oil pan- is this a problem?
#1
Staging Lane
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oil pan- is this a problem?
just got this oil pan, has a small chunk broken out of this hole that appears that it should be blocked off. i don't know what the purpose is for these two holes and why one (the one that has a chunk missing) should be blocked.
what to do? is this junk that i need a refund for?
[IMG][/IMG]
what to do? is this junk that i need a refund for?
[IMG][/IMG]
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#8
12 Second Club
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it was cast with a bottom in it, but it was drilled out during final machining. its typical machining and casting flaws, the entire engine is littered with them. if it bothers you that much, get in there with a dremel or something and clean it up. but do NOT block it off.
#9
Not a problem. The oil flows through those two holes and also through that hump between the two bolts in the oil-cooler block off plate as it goes to and from the oil filter.
#10
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bww, i owe ya. it sure looks like somebody knocked out part of that aluminum!! why not just drill out the whole thing in the casting/machining process???? crazy. but i really appreciate the help!! glad to know it is normal and not busted.
#11
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A lot of the time, an engine builder looking for every last bit of HP, will take a die grinder and other tools similar to what they'd use on cylinder head ports, and port everything where anything flows, oil/coolant/air/fuel...anything that the engine needs to pump, is a parasitic loss...anything that can help it pump it easier, is essentially more efficiency/horsepower.
GM most likely knows that the gain would be minuscule, so the part is good enough for a production vehicle...when you're looking for every last individual horsepower on an all out NA build though...you don't care how minuscule a gain is...a gain is still a gain.