CAT head pressure testing

CAT doesn't do head pressure testing. They usually have the head decked and checked for cracks in side of the exhaust and intake ports. They also should check the valves for stem wear. If the truck has a lot of miles it is better money to get a REMAN CYL head. This way you get a warranty. You don't say what kind of CAT engine but they normally leak because of the head bolts stretching or if it is a 3406E and has a aluminum spacer plate the compression has a tendency to a problem just because of the aluminum compressing. Almost all of the CAT engines fared well with the steel spacer plates. if the block is etched because of the head gasket leaking it may need to have that cylinder removed and the deck cut for a shim.

 

um, yes they do pressure testing. but it is a flawed test. cat reman heads are a shot in the dark anymore for quality.

 

if the cracks are in between the valves and injector area. some cracking is normal. depending on the severity of the cracks. what corrosives are you talking about?

 

Think he's talking about the exhaust gases.

 

I rebuilt a lot of CAT engines for head gasket failures, and never had to take into consideration damage from exhaust gases getting into the cooling system. The problem from head gasket failures is compression getting past the head gasket seals.

 

seams like when they started cutting the relief cuts that all the gasket failures started adding up. got lucky and found a head that didn't have the relief cuts, keepin my fingers crossed!