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valve cover screw oil leak

 
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eschlanser



Joined: 08 Apr 2010
Posts: 60

PostPosted: Fri Jun 01, 2012 4:59 am    Post subject: valve cover screw oil leak Reply with quote

Four or five valve cover screws are leaking oil on my C85. It has the red silicone gaskets. The screws are really tight now and still leak a fair amount. It's on a certified plane. Is there some thing legal that can be used to halt the leak? I have Tight Seal on hand.
Eric in SW Michigan


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BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 738

PostPosted: Fri Jun 01, 2012 5:15 am    Post subject: valve cover screw oil leak Reply with quote

Eric:

You answered your own question and I quote: " The screws are really tight now and still leak a fair amount."  REALLY TIGHT is what is causing it.
Start by:
1 - Removing the cover and the gasket
2 - Cleaning the cylinder face and cover face well, use SCOTCHBRITE and MEK
3 - Wipe down the silicone gasket with a QUICK wipe of MEK.
4 - By pulling on the gasket as you go all the way around - LOOK - for nicks and tares, especially around the screw holes.  If found replace that gasket.
5 - Install the gasket on the cleaned surfaces of the cylinder & cover.
6 - MY TRICK - Totally legal - Use RED Loctite on the threads of the screws.  Yes, RED Loctite.
7 - Tighten the screws in a STAR PATTERN - Tighten the cover to a uniform height - Just enough to show compression of the gasket.  
8 - Unfortunately torque values do not work because the gasket squishes.  But, do not go "really tight".  It's a case of experience.  You now have the experience of what NOT TO DO!  I'm sure you will figure out the rest.


Barry
On Fri, Jun 1, 2012 at 8:59 AM, eschlanser <eschlanser(at)yahoo.com (eschlanser(at)yahoo.com)> wrote:
[quote]--> Continental-List message posted by: "eschlanser" <eschlanser(at)yahoo.com (eschlanser(at)yahoo.com)>

Four or five valve cover screws are leaking oil on my C85. It has the red silicone gaskets. The screws are really tight now and still leak a fair amount. It's on a certified plane. Is there some thing legal that can be used to halt the leak? I have Tight Seal on hand.
Eric in SW Michigan




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