Go over all the bolts and and see if there loose , Be carefull not to over titen them just nip them up
Hi Everyone
My LS1 Calais is leaking a bit of oil from the LH rear corner of the sump. Leaks when engine is running. Guessing is going to be a new sump gasket. Noticing the flange underneath the leak area. Is their an oil pressure gallery in that spot
Go over all the bolts and and see if there loose , Be carefull not to over titen them just nip them up
Those bungs above you mention should be checked, cheap & easy to replace too.
My 2004 WL Caprice 5.7 has the same oil leak.
Several mechanics have told me it's the rear main.
But when I clean all the oil away with degreaser and then check it after a few days driving I start to see drops of oil forming on the left last and the 2nd last rear sump bolts , and maybe a bit of oil above near where the gasket is.
The sump bolts appear to be tight, but I guess it could be the sump gasket ?
Does the engine have to be removed to replace the sump gasket ?
Where are these blanking plugs you mentioned ?
Can they just be screwed out and sealed with thread sealer and screwed back in ?
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