Head back on 454 Vortec 1997
The heads back with no cracks and on the block. This engine had two cylinders getting antifreeze in from a head gasket leak in between them. Now the rest of the top of the engine has to be installed a...
Forum Discussion
Way back in the days of pterodactyls and stegosaurus, I learned factory engines had horrid machine work quality of the block and cylinder head mating surfaces.
A machinist would jig the BRAND NEW cylinder block in the milling machine and the first pass cutting "decking" the block .010 made my jaw drop. Same thing for milling the "heads". The factory machining quality control sucked!
Even with a compression ratio of THIRTEEN TO ONE using LPG propane motor fuel in a heavily loaded R.V. I never ever had coolant leakage or combustion gas leakage. For many years.
So this may be something to think about...
A machinist would jig the BRAND NEW cylinder block in the milling machine and the first pass cutting "decking" the block .010 made my jaw drop. Same thing for milling the "heads". The factory machining quality control sucked!
Even with a compression ratio of THIRTEEN TO ONE using LPG propane motor fuel in a heavily loaded R.V. I never ever had coolant leakage or combustion gas leakage. For many years.
So this may be something to think about...
