trevorbrady
Active member
I have an AFN with a blown head gasket. I pressure tested the system and I have coolant weeping out of the head gasket just below the injectors. The coolant bottle was getting pressurised by compression gases but there's no oil in the coolant or coolant in the oil.
I also have a donor AFN engine with a good head. So I'm going to buy a new head gasket, new bolts and use the donor head.
My question relates to head gasket thickness. I understand the thicker ones are to compensate for material removed from the head during skimming/decking. If I am to use a good original cylinder head I presume I'm supposed to use the thinnest gasket?
Now, while I'm replacing all this stuff, is there any advantage to using a thicker gasket than normal? It will lower compression ratio but I'm using a bigger turbo/injectors/pump head already so is there any performance benefit to using a thicker gasket, lowering the compression ratio to maybe allow more boost?
I'm competent enough to do the work myself but the theory behind the performance aspect is an area I'm just learning about. Any advice appreciated.
I also have a donor AFN engine with a good head. So I'm going to buy a new head gasket, new bolts and use the donor head.
My question relates to head gasket thickness. I understand the thicker ones are to compensate for material removed from the head during skimming/decking. If I am to use a good original cylinder head I presume I'm supposed to use the thinnest gasket?
Now, while I'm replacing all this stuff, is there any advantage to using a thicker gasket than normal? It will lower compression ratio but I'm using a bigger turbo/injectors/pump head already so is there any performance benefit to using a thicker gasket, lowering the compression ratio to maybe allow more boost?
I'm competent enough to do the work myself but the theory behind the performance aspect is an area I'm just learning about. Any advice appreciated.