1040023 Killer Frost Plug Plate

Features:

• Seals leaking or blown frost plugs
• No need to remove old frost plug
• Installs with or without TCC crossover tube
• Large #333 O-ring ensures reliable seal
• Five flanged bolts secure coolant containment
• Ideal during transmission removal or service
• Supports high coolant pressure at high RPM
• Compatible with 2003-2018 5.9L and 6.7L Cummins
• Legal in all 50 states without EO number
• Helps prevent rear engine coolant leaks
• Requires bellhousing bracket removal on 6.7L
• Durable and proven for long-term performance

Stop Coolant Leaks Before They Start

Every Cummins owner knows how frustrating a rear frost plug leak can be, especially when you’re staring down a big tow or planning a long haul. That’s where the BD Diesel Killer Frost Plug Plate comes in to save the day. This easy-to-install solution allows you to seal a leaking or blown frost plug without the hassle of punching it out. It's designed to work whether your frost plug is still intact or already leaking, giving you peace of mind and preventing coolant from sneaking out the back of the block. Whether you’re in the middle of a build or just pulled the transmission for service, now is the perfect time to install this kit and keep your cooling system locked down. Built with a rugged O-ring and secured by five flanged head bolts, this plate stays tight even under high-pressure conditions. It’s a smart insurance policy that helps protect your engine from heat-related damage and unexpected breakdowns. If you want a no-nonsense fix with long-term benefits, this BD plate is the upgrade you’ll thank yourself for.

Engineered To Withstand Extreme Coolant Pressure

The BD Diesel 1040023 Killer Frost Plug Plate is purpose-built to tackle a critical weak point on 5.9L and 6.7L Cummins engines from 2003 to 2018. Inside these blocks, coolant pressure can spike over 70 psi at high RPM before the thermostat opens, often causing the factory rear frost plug to leak or blow out completely. BD’s design doesn’t require removing the old plug and instead seals around it using a large #333 O-ring for a clean, leak-free fit. The plate mounts with five flanged head bolts to distribute pressure evenly and hold firm under heavy load. It’s compatible with or without the TCC crossover tube, adding flexibility during installation. On 6.7L applications, the bellhousing bracket needs to be removed, but for both engines, installation is easiest when the transmission is already out. While the plate can be installed with the transmission in place, the rear surface finish must be inspected to ensure a proper seal. This component is built with durability and simplicity in mind, giving diesel owners a proven solution that performs under pressure.

Fitment: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Notes:

• Can be installed without removing the existing frost plug
• Ideal time to install is during transmission removal
• Surface behind the engine must be inspected before install
• Works with blown out or leaking frost plugs
• Seals coolant leaks without punching out the old plug
• Compatible with or without TCC crossover tube
• 6.7L applications require removing bellhousing support bracket
• Helps prevent future coolant pressure failures
• Includes five flanged head bolts for strong clamping force
• Installation time is approximately 6 hours
• Legal for sale and use in all 50 states
• Covered by a 12-month parts-only warranty