The coolant pressure inside the engine block can reach 70+psi at high rpm before the thermostat fully opens. This will cause a corroded frost plug to leak. The BD rear frost plug is able to be seal the leak without the need to hammer out the old frost plug. We recommend installing the rear frost plug plate when the transmission is removed. The plate can be installed with the transmission in place, however the surface finish on the back of the motor is critical and must be checked prior to use.. BD Diesel Killer Frost Plug Plate - 1989-2002 Dodge Cummins 5.9L. Perfect time to install one is when the transmission is removed!. Perfect Time To Install One Is When Transmission Is Removed. BD Cummins Killer Frost Plug Plate - Dodge 1989-2002 5.9L. Works with the frost plug in place, blown out, or leaking. Killer Frost Plug Plate; Incl. Plate/Bolt/O-Ring;. Works W/Frost Plug In Place/Blown Out/Leaking. Works with and without a TCC crossover tube. Works With or Without A TCC Crossover Tube. KILLER FROST PLUG PLATE DODGE 1989-2002. No Need To Punch The Old Frost Plug Out. Utilizes one large #333 O-ring. Utilizes One Large 333 O-Ring. Engine Expansion Plug Kit. Killer Frost Plug Plate. 12 Month Parts Warranty. KILLER FROST PLATE. Freeze Plug Kit

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