Just did a bit of Google digging and found the following on a marine
"The Vortec 8100 is available in either base performance (375 horsepower) or
high performance (415 horsepower). Both versions feature a coated cast
intake manifold that is designed to optimize flow and includes an integral
system (a valve is not required)."
Is this the same for the 8.1L in the trucks? The reason for asking is my Dad
is starting the process of asking why his 8.1L is using almost 3 qts. of oil
over a 3K mile oil change?! We all know why, yup it knocks like a diesel,
but of course Chevy is going through the excuse chain right now. They asked
if the PCV valve has ever been replaced. He hasn't been able to locate it
and like I said, a part number doesn't show. Tough to replace that which is
integrated in the manifold if this is the case!!! Mine is doing the same
piston knock at 17K miles and appears to be using about a quart of oil in 3K
miles right now. His has been getting progressively worse with more miles
than I have.
Any info will be helpful.
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