timing chain cover oil leak - Team Camaro Tech
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post #1 of 5 (permalink) Old Mar 30th, 03, 03:56 PM Thread Starter
Join Date: Oct 2002
Location: Hansville,Wa. USA
Posts: 11

I just replaced my cam with a larger one. I used new timing cover gaskets, upper, lower(pan) and the wiper seal that fits in the chain cover hole.I installed the wiper seal as per directions with the open side of the seal towards the block. The engine runs fine , lots of power but I now have an oil leak from the wiper seal. I have replaced these gaskets and seals twice and still have a leak. Oh yeah, I also replaced the wiper surface on the balancer with a new chrome sleeve. Is it because the wiper seal needs a little time to settle against the balancer sleeve? Am I correct to think that there is only oil windage behind the timing cover?
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post #2 of 5 (permalink) Old Mar 30th, 03, 09:07 PM
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Join Date: Nov 2002
Location: Aiea, Hawaii
Posts: 571

You might end up using some of the gasket seal stuff in a tube. Many colors to pick from for their heat and type of use range.
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post #3 of 5 (permalink) Old Mar 31st, 03, 05:07 AM
Join Date: Mar 2003
Posts: 298

Strange, It shouldn't leak. Was your balancer seal surface grooved from wear? Those balancer sleeves usually work good. They say to put a little silicone on the balancer before installing the sleeve. Maybe your PCV is plugged and causing higher crank case pressure and blowing it out there. I guess you need to pull the balancer and put a new seal in the front cover again. Put some grease on the balancer seal surface so your not dry on start up. And a little silicone on the crank snout before installing the ballancer to seal there too.
Good luck,
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post #4 of 5 (permalink) Old Mar 31st, 03, 06:18 AM Thread Starter
Join Date: Oct 2002
Location: Hansville,Wa. USA
Posts: 11

Thanks for the hint. No I didn;t put any silicon grease on the seal or the shaft. I'm going to try and get some on the crank end and seal today and see if that cures thye problem.
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post #5 of 5 (permalink) Old Mar 31st, 03, 02:45 PM
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Join Date: Nov 2002
Location: Vancouver, USA
Posts: 10,512

I replaced the plastic timing cover on my ZZ crate motor with a steel cover from GM when doing a cam change. A seal was installed in the cover when I got it. It leaked. I pried it out, and found the rubber on the seal to be hard as a rock an un-pliable. Installed a new seal - problem solved. My guess is that it was old.

It is also possible for oil to leak past the keyway in the balancer. A small dab of silicone in the keyway when installing the balancer is advisable.

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