Medium and Heavy Trucks
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Hi my name is***** will be glad to help. Was the used head sent out to be checked for cracks and milled for straightness? Was the block deck checked with a straight edge? It is either the head head gasket or block deck and in rare cases a cracked block. I recommend sending the head out to be magnafluxed and pressur tested. If it passes then have it milled and check the block deck.what is the complete engine model and serial number?
Who did this engine work? Was this head bought and just bolted on without checking it or machining it? If so then none of the surfaces could be posibly in specs and would cause a head gasket failure. Was the head torqued to the specs in the manual? Incorrect torque could also cause this
the engine info will be on the valve cover tag and the side of the block. Yes this could cause your problem
Any used head should be sent out and checked unless it is a reman
Sounds good Gary
Hi Gary, Thanks for the info. I recommend sticking to the interchange you got from mack as I can not answer without further research what the differences are. I will see what I can come up with for you
I would have to check into this further for you on Monday if that works for you?
Can you still do a pressure test or is it too far disassembled already? You could pressurize the system and with the intake and exhaust manifold removed look for white ash deposits ans coolant leaking in the ports.
Thanks for the update Gary, Send the head out to be pressure tested and magnafluxed. This is inexpensive and will confirm any problems with your head. If it passes have it milled to spec and then we need to look at the engine block for problems