Pesky rear oil leak
02-21-2019, 03:26 PM
#2
I have a oil leak from what appears to b the rear cover after putting dye in the oil. It does not leak until u start the car. Holds 65 lbs of oil pressure cold. No leaks from above that glowing area. I have put 2 new covers on it and gaskets. I thought it was the pan gasket but the dye shows it up the side of the cover. No oil is on the flywheel. Thanks
02-21-2019, 08:05 PM
#4
TECH Senior Member
Not an indent so much a scuff mark, which would not be unexpected. A plastic part would not indent a metal one. If you want a better barbell, get one of SacCity's billet aluminum ones. Better sealing and oil flow.
02-23-2019, 09:28 PM
#6
Have you looked at the Cam sensor or Oil pressure sensor?
The Cam sensor has an O ring where it goes into the block just above the rear cover. If it shrank, It could push oil past there and leak down the rear cover like that.
Oil pressure sensors some times go bad and leak at the plug. I have had to replace a few of those myself.
The Cam sensor has an O ring where it goes into the block just above the rear cover. If it shrank, It could push oil past there and leak down the rear cover like that.
Oil pressure sensors some times go bad and leak at the plug. I have had to replace a few of those myself.
02-24-2019, 06:44 PM
#7
Have you looked at the Cam sensor or Oil pressure sensor?
The Cam sensor has an O ring where it goes into the block just above the rear cover. If it shrank, It could push oil past there and leak down the rear cover like that.
Oil pressure sensors some times go bad and leak at the plug. I have had to replace a few of those myself.
The Cam sensor has an O ring where it goes into the block just above the rear cover. If it shrank, It could push oil past there and leak down the rear cover like that.
Oil pressure sensors some times go bad and leak at the plug. I have had to replace a few of those myself.
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02-25-2019, 01:34 PM
#8
No oil on flywheel means it's likely the cam sensor o ring or the oil pan gasket.
I've done several cam sensors for oil leaks. I've also had a few leak from the oil pan gasket back there, and a few from the rear main.
When you put it back together put the oil pan on last. I once put an oil pan on first then the rear cover and when I did.. when I slid the rear cover on it pushed the rubber piece off of the oil pan gasket and caused a leak
Order the sac city corvette cover alignment tools too so you make sure and get the covers perfect or they will cause a leak. There's ways around the tools if you're careful. I did covers on these for over 10 years without the tools but I did order them recently because of a problem child vehicle, but the problem vehicle was the one above and the problem was my install.
I have a cool way to tighten the pans and get them perfectly located that I use. I've done a ton of these over the years and I cracked one one time and that made me come up with a new method. If you do the pan last, thread in all oil pan bolts including the through trans bolts. Then push down (edit: push the pan into the block, whether that's up or down) on the pan near the trans and tighten the through trans bolts lightly. This pulls the pan all the way back. Then tighten the two front bolts up by the balancer (if you do the rear ones you can crack the pan) this keeps the pan held all the way back. Now release the ones through the trans so the pan can go all the way up against the block and tighten all pan bolts then the through trans bolts.
I know you didn't ask, just figured I would throw a few extra things out in case it helps.
I've done several cam sensors for oil leaks. I've also had a few leak from the oil pan gasket back there, and a few from the rear main.
When you put it back together put the oil pan on last. I once put an oil pan on first then the rear cover and when I did.. when I slid the rear cover on it pushed the rubber piece off of the oil pan gasket and caused a leak
Order the sac city corvette cover alignment tools too so you make sure and get the covers perfect or they will cause a leak. There's ways around the tools if you're careful. I did covers on these for over 10 years without the tools but I did order them recently because of a problem child vehicle, but the problem vehicle was the one above and the problem was my install.
I have a cool way to tighten the pans and get them perfectly located that I use. I've done a ton of these over the years and I cracked one one time and that made me come up with a new method. If you do the pan last, thread in all oil pan bolts including the through trans bolts. Then push down (edit: push the pan into the block, whether that's up or down) on the pan near the trans and tighten the through trans bolts lightly. This pulls the pan all the way back. Then tighten the two front bolts up by the balancer (if you do the rear ones you can crack the pan) this keeps the pan held all the way back. Now release the ones through the trans so the pan can go all the way up against the block and tighten all pan bolts then the through trans bolts.
I know you didn't ask, just figured I would throw a few extra things out in case it helps.
Last edited by 00pooterSS; 02-26-2019 at 04:37 PM.
02-25-2019, 01:52 PM
#9
TECH Senior Member
That's solid advice Pooter! Good technique to learn, as I know it can be tricky!