| Re: [GMCnet] Engine oil control. There's alot more then just opinions [message #277860] |
Fri, 15 May 2015 09:22  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Getting oil to drain back to the pan has nothing to do with the oil pump delivery system. Yes, getting that oil back to the pan is important. But for our application in a motor home engine that's running at under 3200 RPM. That isn't an issue. Running in the 6 to 7000 RPM range. That another story. As to the .055 hole in the galley. That's too big. .008, to .011 is the general size in some applications. That is done. And I've done it in track cars that run at high RPM's with vary radical cam profiles. That's a high load application.. Guy's that have heard of the galley hole idea. So then do it. Just get the smallest drill they have. Most don't have the proper size drill bit. When I checked my bearing clearance in my 403 with about 125,000 miles on it. My timing chain was in great shape. And that was without any hole in the galley plug. Our engine's really run under close to ideal condition's for a long, and healthy life. They don't get subjected to vary much cold run ti
mes. We get in them, and drive for long distances at normal operating temps. My 403 is at 153,000. In this application. I see no reason to add a hole in the galley plug. As to what harm it does. That's really the wrong term to use. I'll explain that tonight. Bob Dunahugh
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