LS2 Monaro Oil Leak

[throwyourbike]

Last week when I moved the Monaro out of the garage I noticed a little spot of oil on the ground but since I had moved the car I was unable to find where it was coming from.

I parked her back in the garage and put some cardboard underneath so that if it happened again I'd be able to trace it.

The next morning I went out to take a look and there was a fresh drop on the cardboard. I checked back again today(5 days later), no more on the cardboard but I was able to spot where its coming from.



Having been floating around this forum for a few years I have an idea what it's likely to be but I am no mechanic so wanted to get your opinions.

[Pete G H]

I'd say rear crank seal is the culprit

[snowwolf]

Quite hard to tell from the photo, may just be the sump gasket seepage, you need to get it a can of good spray solvent and give it a good clean, you may be surprised how little oil that is if its seeping from sump gasket, sometimes its not always the worst case scenario, what I can see in the photo I doubt very much if that is rear seal.

Edited by snowwolf on Wednesday 24th September 20:56

[throwyourbike]

Thanks Pete, that was what I thought too. I've heard its fairly common.

Just as I am about to put her away for the Winter. Typical.

[throwyourbike]

snowwolf said:

Quite hard to tell from the photo, may just be the sump gasket seepage, you need to get it a can of good spray solvent and give it a good clean, you may be surprised how little oil that is if its seeping from sump gasket, sometimes its not always the worst case scenario, what I can see in the photo I doubt very much if that is rear seal.

Edited by snowwolf on Wednesday 24th September 20:56

Sorry for the bad photo, it didn't help that it got flipped when I uploaded it for some reason either.

All fluid levels are 100% and it hasn't dripped in almost a week now so it doesn't seem to be losing much. As you can see there is another drip forming though.

[snowwolf]

I would put money on it that its not crank case seal, get it up on a ramp and clean it off, any good local garage will help you do it, that could be a cup of oil over a very long period, will look worse than it actually is.

[YME]

hi,

Another thought / place to check is the oil pressure sensor at the back of the engine at the top. I have had this twice now and its a B! to change now that a S/C is in the way, but they either leak between the metal and plastic top or through the connection to the plug at the top.

As said, a little oil goes a long way here due to the air speed when moving, it's covered my lower engine and gearbox.

hope this helps as its a quick fix.

Paul

[Black VXR]

my car has leaked from the rear crank case seal for 3 years or more. Hardly shows any loss on the stick - smells a bit funny in heavy traffic when the block gets hot or a drip gets on to the exhaust. I would wait until you have to do the clutch, gearbox or spigot bearing and do it then, not worth the hassle of taking it apart otherwise