Mystery O-ring! Help!

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Feb 24, 2013 | 10:21 AM

Jvmun

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Mystery O-ring! Help!

Long story short I messed up and tapped the crank plug while removing the pilot bearing out of my ls1. I dropped the pan and retrieved the plug. While I was cleaning my pan I found this o-ring sunk at the bottom.

Any ideas? From the oil pump maybe?

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Feb 24, 2013 | 10:32 AM

KCS

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From: Conroe, TX

Yeah, looks like oil pump if that is the rear plug for the crankshaft.

Feb 24, 2013 | 10:50 AM

Jvmun

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I wonder how long its been down in there. Never noticed any problems other than a leak from the valve covers.
How would I get it bank on there?

Feb 24, 2013 | 11:01 AM

01_SuperSlow

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Yup, that's an oil pump o-ring.
I bet the previous owner dropped the ring in the pan and just used another one instead of fishing it out.
It doesn't just come off of the pick-up tube.

Feb 24, 2013 | 11:29 AM

Jvmun

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^ Right?
If the o-ring had been missing from the pick up to for a minute I woud have had other problems right?

Feb 24, 2013 | 11:32 AM

badazz81z28

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Quote:

Originally Posted by Jvmun

^ Right?
If the o-ring had been missing from the pick up to for a minute I woud have had other problems right?

If that O-ring was missing you would have very low to no oil pressure. Like mentioned, the way it's installed on the pick-up, impossible to come off let alone in one piece. Are you the original owner?

I also feel the pick-up O-ring is bigger than the diameter of the pilot hole and a darker blue....Is there suppose to be an O-ring in that general area?

What is the diameter of the O-ring you have there?

Feb 24, 2013 | 11:47 AM

studderin

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From: Rochester, NY

ya thats a pick tube O ring, looks new like its never been in the pump, so he droped it and just left it in there

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Feb 24, 2013 | 03:57 PM

dr_whigham

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From: Lafayette, LA

Bingo. Oil Pump O-ring. You obviously have good oil pressure, so as someone already stated, they dropped it in there and never bothered to fish it out.