6.5/6.2 High Performance Engine Modifications
GM 6.5L turbo diesel Crank Case Depression Regulator (CDR) and engines with high boost turbochargers.
Unmodified 6.5L Turbo Diesels, operated at approximately 6-8 Pounds per Square Inch (PSI) boost pressures. The CDR was engineered to maintain a slight vacuum in the Crank Case (CC) drawing blow...