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Old 06-21-2005, 04:25 PM
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How to reseal timing chain cover to oil pan

I am going to change the cam out in my 70 model 400 SBC and of course I will pull timing chain cover and leave oil pan in place.What is the proper way to re seal to keep from createing a oil leak between oilpan and timing cover?

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Old 06-21-2005, 05:43 PM
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I did this swap on my Big block just this past weekend.
What i did was pulled the old oil pan seal off the timing cover, and took off all the silicon that was on there made sure it was nice and clean
I then ran a bead of silicon on the bottom of the new seal where it will meet the timing cover.
Put the new seal on.
Wait a bit for it to set up.
Depending on the seal you have you may need to trim off a little bit of the tabs on the ends
Clean the lip where the oil pan meets the timing cover.
lay down another bead of silicon spread it out a little so it covers the whole lip.
Put a glob of silicon on the ends of the seal where you trimmed just to make sure.
Then i just had to set it back on and tighten the boltsand i was set, not a leak yet.
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Old 06-21-2005, 09:55 PM
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i usually end up loosening the bolts about 1/2 way back on the pan and pull the timing cover.clean it and take a pair of tin snips or cut off wheel or something and cut the corners off the ends of the lip on the inside of timing cover where they flip up a little.it will be easier from then on to remove and install.make sure when you put it back together you use some silicone in those corners to prevent leak.thats the short of it.of course you have to remove the balancer and so fourth.if you have never done this before go to the knowledge base up top and see there is an article about it.if it isn't good enough,go to chevy high perf. magazine or super chevy or car craft or hotrod,or GM high tech perf.,popular hotrodding and so on.there is literally tons of info in the tech and how to sections of all these mags.
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