Topside Oil Leak - Team Camaro Tech
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post #1 of 6 (permalink) Old Aug 8th, 09, 06:08 PM Thread Starter
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Topside Oil Leak

So I noticed a fair amount of oil on the garage floor when I backed out of the garage, I looked around and it seems to be coming from the rear of the right hand valve cover. A friend told me that camaros are notorious for leaking at the valve covers... Is this true or should I start to think rear main seal???


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post #2 of 6 (permalink) Old Aug 8th, 09, 06:26 PM
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Re: Topside Oil Leak

Wipe with your finger underneath the valve cover to see if it is oily.
If oily, it has a leak. If finger is dry, no leak.

Remove the bellhousing inspection cover and check front side of flywheel.
If wet, could be a leaky rear main seal or leaky oil pan gasket.

Another feat would be to set parking brake, chock wheels, place the front tires on ramps, either layers of 2X10 boards or steel ramps, run engine and crawl underneath and do a visual inspection to see where oil is coming from. Can't find any, shut car off, leave car set overnight, visualize puddle location under car, crawl underneath and look directly above. Oil could travel from front of engine to rear due to airflow while vehicle is traveling.

Check all places. Report back.

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post #3 of 6 (permalink) Old Aug 8th, 09, 06:37 PM
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Re: Topside Oil Leak

Quote:
Originally Posted by Everett#2390 View Post
Wipe with your finger underneath the valve cover to see if it is oily.
If oily, it has a leak. If finger is dry, no leak.

Remove the bellhousing inspection cover and check front side of flywheel.
If wet, could be a leaky rear main seal or leaky oil pan gasket.

Another feat would be to set parking brake, chock wheels, place the front tires on ramps, either layers of 2X10 boards or steel ramps, run engine and crawl underneath and do a visual inspection to see where oil is coming from. Can't find any, shut car off, leave car set overnight, visualize puddle location under car, crawl underneath and look directly above. Oil could travel from front of engine to rear due to airflow while vehicle is traveling.

Check all places. Report back.

what Everet said is the first check, over night put a piece of cardboard under the car, look above the spots, like he said oil will blow back.
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post #4 of 6 (permalink) Old Aug 8th, 09, 06:41 PM
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Re: Topside Oil Leak

If you remove the valve cover you'll see where the puddle of oil settles at the lower rear corner of the cylinder head.....If the valve cover gasket lost it's sealing ability, this is where it would leak out!.....I had a passenger side valve cover gasket leak on my sbc, at first I thought it was a rear main or an oil pan leak because of where the oil spot was on the ground.....The oil was actually leaking from the rear of the valve cover and running down the bell housing and dripping at the lower center of the bell housing which confused me into thinking it was a rear main seal or an oil pan leak!.....Does this writing make any sense as I'm starting to feel a little weird!
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post #5 of 6 (permalink) Old Aug 9th, 09, 10:59 AM Thread Starter
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Re: Topside Oil Leak

Did some research today, and we think it might be the passenger-side head gasket? However, we also found some oil around the oil pressure gauge tap. Removed it and re-sealed it, we'll see if this solves the problem
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post #6 of 6 (permalink) Old Aug 9th, 09, 11:47 AM
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Re: Topside Oil Leak

There shouldn't be any oil coming from the head gasket, oil does not enter the combustion chamber in large quantities to drip, and if it did you would have noticed way sooner.

When we put new heads on my car we used thin .025" head gaskets and for the first few days I always looked underneath because I was ultra paranoid about them blowing out, I saw that the passengers side had oil right between #1-3 and almost had a heart attack, until I traced the leak back to the valve cover. It does look like oil would come from the head gasket, and you can't really see how it does until you pull the motor or remove the exhaust manifolds/headers, oil just runs down the side of these things like nothing and can be very deceiving where it comes from.

Get rid of the cork gaskets that you probably have, get some good blue rubber fel-pro gaskets and don't over torque the valve covers, many people do that.

btw, my oil sending unit has always leaked, no matter what I do to fix it.

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