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- #61
Since I have a 5.7 engine and it has the normal GM layout....of one side 5/8 and the other 3/4 heater hose (hoses that feed the heater core , intake & return), I'm going to later on see about changing the one side on the engine to 5/8 since I have an adapter in the OEM style heater hose at the enigne to adpat down from 3/4 to 5/8. As I recall the hose feeding the water pump is 3/4. Not sure the impact but it would put me only dealing with 5/8 hose and no adapters. The 5.7 votec has an unusual fitting at the water pump in comparison to the old school 5.7 stuff. Plus I'm not a fan of how the heater hose comes over and gets rather close to the exhaust manifold.