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 Pontiac V8 dumping oil on startup

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Civilian Posted - 17 May 2016 : 11:23:31 PM
Hey all,

Please forgive if this is an incredibly simple question. I fired up my 455 for the first time the other day. It ran for 15 seconds and I was so excited, I didn't see the oil gauge until then. It had no oil pressure so I immediately turned it off. I looked under the car and pretty much the entire contents of the engine oil was on the ground. There is oil all over the top of the transmission and pulled up on the back of the valley pan. There is no oil leaking around the front of the engine or oil pan. I assumed I missed an oil plug between the transmission and engine. I removed the transmission only to see that it was dry near the flywheel. I did notice, however that there was a 3/8 inch threaded hole next to the distributor that I did not plug. My question is: could that have dumped that much oil that quickly? I had expected that it would shoot up all over my distributor and maybe even windshield, but it did not. Did I just have the right RPMs to make it bubble up and not shoot out the top? Does someone else have an idea of where my oil went out of?
4   L A T E S T    R E P L I E S    (Newest First)
Civilian Posted - 19 May 2016 : 6:51:48 PM
That was it; running great now! It sounds mean! Thanks guys!
Blued and Painted Posted - 18 May 2016 : 12:46:42 PM
I normally use both pressure access locations and have the warning/idiot light in the dash operational and a pressure gauge.
Civilian Posted - 18 May 2016 : 10:31:50 AM
That's so good to hear! I have put a plug in it and will clean things up and put the transmission back on. This is a new build and I used a ton of assembly lube, so fingers crossed. I'll let you know how it goes.
cortcomp Posted - 18 May 2016 : 09:50:17 AM
You bet it could have, that's one of the main oil journals near the pump, and a good spot to tap for a mechanical pressure gauge. I would put a pipe plug in there, refill with oil and clean up, and start it back up. If you don't have any noise, then you're likely just fine. Assuming this was a new build? If so, then assembly lube likely saved you.

Side story: My dad told me a story of a guy he worked with who build a motor, used lubriplate as assy lube. He put the bearings in wrong so the oil holes weren't lined up, and drove it about 60 miles round trip. It wasn't until the ride back where he started having issues, and i forget how the motor died (knock, locked up, etc.)

So, even without good oil pressure, just some making it in there and assy lube will get you quite a way.

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