6.0L Power Stroke Maintenance Buyer's Guide (2003-2007)

2003-2007 Ford F-250 F-350 6.0L Power Stroke

The 6.0L Power Stroke has the worst reputation of any modern diesel, and most of it traces back to a handful of root causes: debris in the cooling system, high pressure oil leaks, and weak electrical supply to the injectors. Find and fix those, keep up with fluids, and a 6.0 will tow hard for a very long time.

This guide walks through what to check, what to replace, and what order to do it in, with the parts we carry for 2003-2007 Ford F-250 and F-350 Super Duty trucks. Every product card lists the fitment as it appears on the product page, and the product page has the final word on fitment for your exact truck. Trucks built early in the 2003 model year have the 7.3L, so check your engine before ordering.

Quick answer: what to do first on a 6.0

Get data before you buy parts. Log engine oil temperature (EOT) against coolant temperature (ECT), FICM voltage and fuel pressure. Those three numbers tell you what the truck actually needs.
If EOT runs 15°F or more above ECT on the highway, the oil cooler is restricted. Service it before it takes out the EGR cooler.
Flush the cooling system and add coolant filtration to keep casting sand and debris out of the new parts.
Check FICM voltage and battery health. Weak batteries kill FICMs, and a weak FICM causes hard starts and injector problems.
Fix high pressure oil leaks (STC fitting on 2005-2007, standpipes and dummy plugs) if the truck stalls or will not start hot.
Change both fuel filters and confirm fuel pressure never drops below 45 psi.

Know your 6.0: early vs late trucks

Ford made running changes to the 6.0 throughout its life, and several of them change which parts fit. Before you order anything, know whether you have an early or a late engine. The engine build date on the valve cover sticker, or your VIN run through a parts counter, settles it.

Area	Early engines (built before about October 2003)	Later engines
High pressure oil rail	Straight "log" style rail with screw-in standpipes	"Wavy" style rail. Standpipe and dummy plug kits for these engines do not fit early engines built before September 30, 2003
ICP sensor location	Behind the turbo on the high pressure oil pump cover, next to the IPR valve	Passenger side valve cover
HPOP to branch tube connection	Bolted fitting	STC (snap to connect) fitting on 2005-2007, a known leak point
EGR cooler	Round cooler on engines built before about September 22, 2003 (2003 and some early 2004), less prone to failure	Square cooler on later 2004-2007 engines, more prone to failure
Turbo oil drain tube	Early tube (2003-2005)	Improved tube on 2006-2007
Front suspension (4x4)	Leaf springs through 2004	Coil springs with radius arms and a track bar from 2005

The 2003-2005 Ford Excursion uses the same 6.0 and is covered by the same Ford service bulletins, so most engine content here applies. Chassis, suspension and many bolt-on parts are different, so check each product page.

6.0L Power Stroke service schedule

These are Ford's intervals plus common specialist checks, with the severe service column most 6.0 owners should follow. Towing, idling, short trips, dusty roads and stop and go driving all count as severe service.

Item	Spec	Normal	Severe / towing
Engine oil and filter	15 quarts with filter. 15W-40 above 30°F, API CK-4 or CJ-4 meets the original spec	7,500 miles or 6 months	5,000 miles or 6 months
Fuel filters (frame and engine)	Replace both together. Drain water from the frame-mounted HFCM at every oil change	15,000 miles	15,000 miles, or 7,500 miles on biodiesel blends above B5
Coolant	Motorcraft Gold (VC-7-B 50/50, or VC-7DIL-B premix), about 27.5 quarts	First change at 100,000 miles / 5 years, then every 45,000 miles / 3 years	Test coolant condition every 15,000 miles
Degas cap	Should hold and release at 12-18 psi	Replace at every coolant change	Replace any time coolant loss is diagnosed
5R110W automatic	Motorcraft Mercon SP only. Replace internal and external filters	30,000 miles	30,000 miles
ZF6 manual	Mercon V ATF, about 6 quarts	60,000 miles	60,000 miles
Air filter	Replace by the restriction indicator, not by mileage	Inspect every oil change	Inspect every oil change
EGR valve	Clean carbon buildup	Every other oil change (common shop practice)	Every other oil change
Batteries and alternator	Both batteries at least 12.6 V at rest	Load test yearly	Load test before every winter
Front end inspection	Track bar, ball joints, tie rod ends, drag link	Every oil change	Every oil change

Capacities are approximate. Fill to the dipstick or the cold fill mark and confirm specs in your owner's manual.

Step one: put a monitor on it

Nearly every expensive 6.0 failure gives a warning in the data first. The trouble is that the factory gauges do not show it. A plug-in monitor that reads engine oil temperature, coolant temperature, FICM voltage and injection control pressure (ICP) turns a major surprise repair into a smaller planned one. If you buy one thing for a 6.0, make it this.

EOT vs ECT: on a warm truck at steady highway speed with no trailer, Ford's service bulletin says a difference of 15°F or more means the oil cooler needs service. Heavy towing can widen the gap on a healthy cooler, so judge it unloaded.
FICM voltage: should sit around 48 V at key on, while cranking and while running. Ford's minimum is 45 V.
ICP: roughly 500 psi is needed to fire the injectors. A slow climb while cranking, or a big drop when hot, points to a high pressure oil leak.

Start here

Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor

Edge Insight CTS3 monitor. Reads EOT, ECT, FICM voltage, ICP and more on a color screen, with alerts you set. Monitor only, no tuning. The single most useful tool a 6.0 owner can buy.

Listed fitment: Universal

Check price and fitment

Cooling system, oil cooler and EGR cooler

This is the 6.0 failure chain, and understanding it is the key to owning one. Coolant flows from the water pump through the engine oil cooler and then on to the EGR cooler. Casting sand left in the block from the factory, plus gel from broken down or mixed coolant, slowly plugs the coolant side of the oil cooler. As flow drops, the EGR cooler downstream gets less coolant, overheats, boils, and eventually cracks. A cracked EGR cooler pushes coolant into the intake and exhaust, which can lead to overheating, pressurized coolant blowing out of the degas bottle, and in the worst case a hydrolocked engine or blown head gaskets.

That is why replacing a failed EGR cooler without fixing the oil cooler so often leads to a second failure. Fix the cause, then the casualty.

1. Oil cooler

If your EOT/ECT gap is 15°F or more, replace the oil cooler. Plan on a full cooling system flush at the same time so the debris that clogged the old cooler does not go straight into the new one. If oil or other contaminants got into the coolant, Ford's flush bulletin calls for repairing the source first, then following its multi-step cleaning procedure.

Safety: never open the degas cap on a hot engine. Let it cool fully first.

Best value

PPE 314030310 Heavy Duty Oil Cooler & Gasket Kit

Heavy-duty PPE oil cooler with the gaskets you need for the swap.

Listed fitment: 2003-2007 Ford F250/F350

Check price and fitment

Mishimoto MMOC-F2D-03 Replacement Oil Cooler

Mishimoto direct-fit replacement oil cooler.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SD-OC-6.0 Oil Cooler Kit

Sinister oil cooler kit with the related gaskets and hardware.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

2. Coolant filtration

A bypass coolant filter sends a small stream of coolant through a filter element and catches casting sand and debris before it reaches the oil cooler. It will not unclog a cooler that is already restricted, but it is the best insurance for a new one. Change the element often for the first few thousand miles after a flush, since that is when it catches the most.

Recommended

Mishimoto MMCFK-F2D-03BK Black Coolant Filter Kit

Mishimoto bypass coolant filter kit. Catches casting sand and debris before it reaches the oil cooler.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SD-COOLFIL-6.0-W Coolant Filtration System

Sinister coolant filtration system for 2003-2007 6.0L trucks.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

3. EGR cooler

Ford's list of EGR cooler failure symptoms includes coolant venting from the degas cap, coolant loss with no external leak, white vapor from the tailpipe (steam), loss of cabin heat, and overheating with reduced power, usually under load. The 2004-2007 square coolers fail more often than the round 2003 cooler. Replacement with a new OEM-spec or upgraded cooler restores the factory system and is commonly paired with oil cooler service. Clean the EGR valve while you are there.

Sinister SD-EGRC-6.0-SC-BLUE Replacement EGR Cooler 50 State Legal

Replacement EGR cooler for 2004-2007 trucks, listed as 50 state legal. Restores the factory EGR system.

Listed fitment: 2004-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SD-EGRC-6.0-04-IK Upgraded EGR Cooler Kit

Sinister upgraded EGR cooler kit for 2004-2007.

Listed fitment: 2004-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SD-EGRC-6.0-03 Ford Upgraded Round EGR Cooler

Sinister upgraded round EGR cooler for 2003 trucks.

Listed fitment: 2003 Ford F250/F350 6.0L Power Stroke

Check price and fitment

PPE 316129505 EGR Cooler Installation Kit

PPE EGR cooler installation kit with the gaskets and hardware for 2004-2007.

Listed fitment: 2004-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

4. Degas bottle, cap and water pump

Do not overlook the cheap parts. A degas cap that will not hold 12-18 psi, or a cracked degas bottle, causes coolant loss and pressure problems that look like a cooler or head gasket failure. Replace the cap at every coolant change. Water pumps fail at the seal (look for drips from the weep hole), the bearing (grinding near the belt) or the impeller.

Mishimoto MMRT-F2D-03BK Black Degas Bottle

Mishimoto aluminum degas bottle. Replaces a cracked or swollen plastic factory bottle.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SDDCFORD94 Billet Coolant Reservoir (Degas) Cap

Billet degas cap. Replace the cap any time you change coolant or chase a coolant loss.

Listed fitment: 1994-2016 Ford F250/F350 7.3L/6.0L/6.4L/6.7L Powerstroke

Check price and fitment

Mishimoto MTS-F2D-03CL Low-Temp Thermostat & Housing

Mishimoto thermostat and housing. Replace thermostats during any cooling system service.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Mishimoto MMRAD-F2D-60 Aluminum Radiator

Mishimoto aluminum radiator for 2003-2007, for a radiator that is leaking or contaminated after a cooler failure.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Coolant type

Ford specified Motorcraft Gold (VC-7-B concentrate mixed 50/50 with distilled water, or VC-7DIL-B premix). The system holds about 27.5 quarts. Never mix coolant types or colors. Some 6.0 specialists convert to a silicate-free extended life coolant after a thorough flush, believing it reduces oil cooler deposits. That is a specialist opinion, not a Ford recommendation, so if you switch, flush completely first.

Shop all 2003-2007 6.0L cooling upgrades.

Head gaskets and head studs

The 6.0 holds each cylinder head down with four 14 mm torque-to-yield bolts per cylinder. When cylinder pressure gets high enough (usually from tuning, heavy towing, or an EGR or cooling problem raising heat), those bolts can stretch past their yield point and lose clamping force. The head lifts slightly, combustion gas gets into the cooling system, and coolant gets pushed out of the degas bottle.

A stock, well maintained 6.0 usually keeps its factory head bolts. But torque-to-yield bolts cannot be reused, so if the heads come off for any reason, install head studs. Independent shops treat that as standard practice.

ARP 250-4202 Head Stud Kit

ARP 2000 head studs, the long-standing standard for 6.0 head jobs. Torqued in three steps to 210 lb-ft with ARP Ultra-Torque lube.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Gator Fasteners HSK60 Head Stud Kit

Gator Fasteners head stud kit for 6.0L, a popular alternative.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

PPE 318034400 Head Stud Kit

PPE head stud kit for 6.0L.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Powerstroke Products PP-HGS-6.0/18 18mm Head Gasket Set

Head gasket set for a 6.0 head job. Confirm 18 mm or 20 mm dowel size for your engine.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Symptoms of a head gasket problem include coolant puking from the degas bottle under load and a heater that blows cold once the truck is warm in cold weather. Ford's diagnostic process checks the degas cap, the EGR cooler and turbo overboost first, so rule those out before pulling heads.

FICM, batteries and the electrical system

The fuel injection control module (FICM) sits on the driver side valve cover and boosts battery voltage to about 48 volts to fire the injectors. Heat, vibration and, above all, weak batteries wear it out. Low FICM voltage first shows up as a hard start, especially in the cold, then rough running and lost power. Many 6.0 owners have replaced injectors that were fine because the real problem was the FICM.

Check FICM voltage with a monitor or scan tool at key on, while cranking and while running before you replace any injector.
Load test both batteries every year, ideally before winter. Each should read at least 12.6 V at rest. Replace them as a pair.
Test the alternator. A weak charging system starves the FICM just like weak batteries.

BD Diesel 1059700-A 58V FICM Fuel Injection Control Module

BD 58V FICM for 2003-2007. Higher output voltage gives the injectors more margin, especially in the cold.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SDFICMFORD0358V 58V Reman Arctic PowerVolt Fuel Injection Control Module (FICM)

Sinister 58V remanufactured FICM for 2003-2007.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

High pressure oil leaks: STC fitting, standpipes and dummy plugs

The 6.0's HEUI injectors are fired by engine oil at high pressure, roughly 500-700 psi at idle and 3,000 psi or more under load. Below about 500 psi, the injectors will not fire. Any leak in that system shows up as a long crank, a stall without warning, or a truck that starts fine cold but will not restart hot.

STC fitting (2005-2007)

On 2005-2007 engines, the high pressure oil pump connects to the branch tube with a snap to connect (STC) fitting. Its seal and locking ring wear and it can leak or separate. Ford released an updated fitting kit with a support bracket that keeps the branch tube from moving. If your 2005-2007 has hot no-start or stalling problems, this is a prime suspect.

Standpipes and dummy plugs

Standpipes connect the pump to the oil rails under the valve covers, and dummy plugs seal the ends of the rails. Both rely on O-rings that eventually leak. Common codes include P2284, P2290 and P2291. Shops test for these leaks by pressurizing the system with shop air through the ICP sensor port and listening under the valve covers.

ICP sensor

On early engines the ICP sensor sits behind the turbo, where heat cooks the connector. A leaking sensor also soaks its connector in oil. A quick test: unplug it. The computer then defaults to about 750 psi. If the truck starts and runs normally with the sensor unplugged, replace the sensor and its pigtail together.

2005-2007

Sinister SD-HPOP-FK-04 STC HPOP Fitting Kit

Updated STC fitting kit with support bracket. The fix for leaking or separating STC fittings on 2005-2007 trucks.

Listed fitment: 2004-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Fuel system

The 6.0 uses two fuel filters. The primary filter lives in the horizontal fuel conditioning module (HFCM) on the driver side frame rail, along with the electric lift pump and water separator. The secondary filter is on top of the engine, just ahead of the oil filter housing. Change both at the same time every 15,000 miles, and drain water from the HFCM at every oil change.

Fuel pressure must stay above 45 psi at all times, including full throttle under load. A healthy system usually shows 55-65 psi with very little needle bounce. Low pressure starves and damages the injectors. The two usual causes are a collapsed regulator spring in the engine filter housing and a stuck or damaged regulator poppet. An upgraded regulator spring raises pressure about 10 percent. The housing threads are aluminum, so do not overtighten the cover screws.

Recommended

Sinister SDFUELBLK60ADJ Blue Spring Kit with Adjustable Billet Spring Housing

Upgraded regulator spring kit with an adjustable billet housing. Raises fuel pressure to protect the injectors.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

FASS TSF14180F140G Titanium Signature Series 140GPH 55PSI Fuel Lift Pump

FASS frame-mounted lift pump with added filtration and water separation, for owners who want more than the factory HFCM.

Listed fitment: 1999-2007 Ford F250/F350 7.3L Powerstroke/6.0L Powerstroke

Check price and fitment

AirDog A7SABF593 II-5G 165GPH Lift Pump

AirDog lift pump with air separation and filtration for 2003-2007 6.0L.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Mahle GS33711 Victor Fuel Injector Seal Kit

Injector seal kit. Replace seals any time an injector comes out.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Injectors on the 6.0 are oil fired, so dirty or broken down oil causes injector stiction (sticking). Regular oil changes are the best injector protection there is. Shop all 2003-2007 6.0L fuel system parts.

Turbo, intake and charge air

The 6.0 uses a variable geometry turbo (VGT). A ring of vanes inside the turbine housing, moved by a unison ring, changes the turbo's behavior with engine speed. Trucks that spend their lives at steady highway speed or idling never sweep the vanes through their full range, so soot and rust build up and the vanes stick. Depending on where they stick, you get lag off idle or a truck that pulls hard down low and falls flat up top.

Rule out the cheap causes first: a clogged EGR valve, leaking intercooler boots, and a plugged exhaust backpressure sensor line.
Exercise the vanes: a scan tool can command them fully open and closed, and an occasional full throttle pull, where it is safe and legal, keeps them moving.
If they are stuck, the turbo comes off to clean the vanes and unison ring. A stainless or billet unison ring resists the corrosion that caused the problem.

Intercooler boots on the hot side are a known leak point. Ford's bulletin calls for rebuilding them with new clamps tightened to 9 lb-ft. A boost leak raises exhaust temperatures and costs power and fuel economy, so check the boots at every oil change.

No Limit Fab 60CBS Complete Hot & Cold Side 4 Silicone Boot Set

Complete hot and cold side silicone boot set. Replaces every intercooler boot in one job.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SD-BK-6.0 Intercooler Hose & Clamp Kit

Sinister intercooler hose and clamp kit.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Mishimoto MMICP-F2D-03BK Intercooler Pipe and Boot Kit

Mishimoto intercooler pipe and boot kit for 2003-2007.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Garrett Turbos 792593-0001 VGT Solenoid

Garrett VGT solenoid. Check its resistance before replacing a turbo for vane control problems.

Listed fitment: 2003-2007Ford 6.0L Powerstroke & 13-17 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Check price and fitment

Sinister SD-TDF-6.0-KIT Turbo Drain Tube & Feed Line Kit

Turbo oil drain tube and feed line kit. Worth doing when the turbo comes off, especially on 2003-2005 trucks.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Transmission

5R110W TorqShift automatic

The 5R110W is a stout five speed when it gets clean fluid. Use Motorcraft Mercon SP only, never a universal ATF, and replace both the internal filter and the external spin-on filter (on the passenger side frame rail near the cooler) every 30,000 miles regardless of how the truck is used. Total capacity is about 17.5 quarts, but a pan drop takes much less, so fill to the cold fill zone on the dipstick.

Early units had a few weak points that Ford revised over the run, including the overdrive one-way clutch, rear planet pins and the low/reverse snap ring. On a high mileage truck that tows heavy, a quality rebuild with updated parts is the right move when the time comes.

SunCoast 5R110W-SK Transmission Shift Kit for 5R110

SunCoast shift kit for the 5R110W. Firmer shifts reduce clutch slip and heat when towing.

Listed fitment: 2004-2012 Ford F250/F350/F450/F550 6.0L/6.4L Powerstroke

Check price and fitment

Mag Hytec F5R110 Transmission Pan

Mag-Hytec deep transmission pan. Adds fluid capacity for better cooling.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

SunCoast 5R-GUARDIAN-6 Guardian 5R110 Torque Converter 6-Bolt

SunCoast billet torque converter for 6.0L trucks that tow heavy or make more power.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

ZF6 six speed manual

The ZF S6-750 six speed was available behind the 6.0 in every year. It takes Mercon V ATF, about 6 quarts, changed every 60,000 miles. F-250 and F-350 trucks used a dual mass flywheel through 2006, which is the common failure point. Many owners replace it with a single mass flywheel and clutch kit. A little gear rattle at idle is normal with a single mass setup.

Valair NMU70432-01 HD Organic Clutch with Flywheel Rated at 400HP

Valair heavy-duty organic clutch with a flywheel included. A common replacement for a failed dual mass flywheel.

Listed fitment: 2003-2010 Ford 6.0L/6.4L Powerstroke

Check price and fitment

South Bend Clutch HYDX-F6.0-6.4 Hydraulic Assembly for Manual Transmission

South Bend replacement clutch hydraulics for 2003-2010 6.0L and 6.4L.

Listed fitment: 2003-2010 Ford F250/F350 6.0L/6.4L Powerstroke

Check price and fitment

Steering and front end

Death wobble on 2005 and newer Super Duty trucks is almost never one bad part. It is wear stacking up across the track bar, ball joints, tie rod ends and drag link until a bump starts an oscillation the front end cannot damp. Bigger tires and lifts speed that wear up. A new steering stabilizer can hide the symptom, but it does not fix it.

With the engine running and the truck on the ground, have a helper rock the steering wheel side to side while you watch the track bar ends, tie rod ends and drag link. Any visible slop is a worn part. Set the parking brake, put the transmission in Park, and keep hands clear of moving parts.
Check the ball joints with the front end raised.
Replace worn parts as a set, then align the truck. Install a fresh stabilizer last.

2005+ 4WD

Kryptonite KRFSK05 Death Grip Steering Kit

Kryptonite Death Grip steering kit for 2005+ 4WD Super Duty. Replaces the tie rod and drag link with heavy-duty parts.

Listed fitment: 2005-2025 Ford F250/F350 Super Duty 4WD

Check price and fitment

Kryptonite 9920BJPACK Upper And Lower Ball Joint Package

Kryptonite upper and lower ball joint package for 1999-2022 4WD Super Duty.

Listed fitment: 1999-2022 Ford F250/F350 Super Duty 4WD

Check price and fitment

ICON 611020 Track Bar Bushing & Sleeve Kit

ICON track bar bushing and sleeve kit for 2005-2016 4WD. A cheap fix for the most common source of slop.

Listed fitment: 2005-2016 Ford F250/F350 Super Duty 4WD

Check price and fitment

Kryptonite KR500262 Track Bar Ball Joint

Kryptonite replacement track bar ball joint for 2005+ Super Duty.

Listed fitment: 2005-2021 Ford F250/F350 Super Duty

Check price and fitment

USA Standard ZSG7621 Power Steering Box

Replacement power steering box for 2005-2008 Super Duty.

Listed fitment: 2005-2008 Ford F250/F350 Super Duty

Check price and fitment

Axiom Supply AX515081 Lifetime Warranty Wheel Bearing Assembly

Front wheel bearing assembly for 2005-2010 4WD.

Listed fitment: 2005-2010 Ford F250/F350 4WD

Check price and fitment

The 6.0 reliability upgrade order

People call it "bulletproofing," but there is no single kit that does it. These are the jobs that matter, in the order we suggest doing them. Use your monitor data to decide which ones your truck actually needs.

Order	Job	Why
1	Monitor and baseline (EOT/ECT, FICM voltage, fuel pressure, degas cap test)	Tells you which jobs your truck needs
2	Oil cooler, coolant flush and coolant filtration	A restricted oil cooler starves and kills the EGR cooler
3	EGR cooler replacement	A cracked cooler pushes coolant into the engine and exhaust
4	FICM test or upgrade, batteries and alternator	Low voltage causes hard starts and injector problems
5	High pressure oil sealing (STC kit on 2005-2007, standpipes, dummy plugs)	Leaks cause stalling and hot no-start
6	Fuel regulator spring and both fuel filters	Keeps fuel pressure above the 45 psi minimum
7	Head studs and gaskets	When the heads come off, or before adding power
8	Water pump, degas bottle and cap	Cheap parts that cause expensive symptoms

Shop parts for your truck

Shop all 2003-2007 parts and accessories

Not sure which parts your truck needs?

Alligator's sales team helps 6.0 Power Stroke owners sort out these jobs every day. Tell us your year, mileage, what your monitor shows and how you use the truck, and we will help you build the right parts list and confirm fitment before you order.

Call 208-719-7400 Send us a message

Frequently asked questions

How much oil does a 6.0 Power Stroke hold?

About 15 quarts with a filter change. 15W-40 is the common choice above 30°F, and API CK-4 or CJ-4 oil meets the original spec.

How often should I change the oil on a 6.0?

Ford calls for 7,500 miles under normal use and 5,000 miles (or 6 months) under severe use. Towing, idling and short trips count as severe, so most 6.0 owners should use 5,000 miles. The HEUI injectors run on engine oil, so clean oil is also injector protection.

How do I know if my 6.0 oil cooler is clogged?

Log engine oil temperature and coolant temperature on a warm truck at steady highway speed with no trailer. Ford's service bulletin says a difference of 15°F or more means the oil cooler needs service.

Why is coolant blowing out of my degas bottle?

Ford lists a leaking EGR cooler, a head gasket leak and a failed degas cap among the causes. Test the cap first (it should hold 12-18 psi), then check the EGR cooler before suspecting head gaskets.

What fuel pressure should a 6.0 have?

Fuel pressure should never drop below 45 psi, including at full throttle. A healthy system usually shows 55-65 psi with very little needle bounce.

How often do I change the fuel filters on a 6.0?

Change both filters (frame and engine) every 15,000 miles, or every 7,500 miles on biodiesel blends above B5. Drain water from the frame-mounted module at every oil change.

What voltage should a 6.0 FICM put out?

About 48 volts at key on, while cranking and while running. Ford's minimum is 45 volts. Check FICM voltage and battery health before replacing injectors for a hard start.

Why won't my 6.0 start when it is hot?

The most common causes are high pressure oil leaks: the STC fitting on 2005-2007 trucks, standpipes, dummy plugs, or an ICP sensor problem. Low FICM voltage can also cause hard starting.

Do I need head studs on my 6.0?

Not necessarily on a stock truck that is maintained well. If the heads come off for any reason, or before adding power, install head studs, since the factory torque-to-yield bolts cannot be reused.

What coolant does the 6.0 use?

Ford specified Motorcraft Gold (VC-7-B concentrate mixed 50/50, or VC-7DIL-B premix). The system holds about 27.5 quarts. Do not mix coolant types.

What transmission fluid does the 6.0 use?

The 5R110W automatic takes Motorcraft Mercon SP only, changed with both the internal and external filters every 30,000 miles. The ZF6 manual takes Mercon V.

What causes death wobble on a 2005-2007 Super Duty?

Accumulated wear in the track bar, ball joints, tie rod ends and drag link. A steering stabilizer alone hides the symptom without fixing it.