Re:Update- Jack Lawrence's Advice - Saab Sonett Bulletin Board - Saabnet.com
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Re:Update- Jack Lawrence's Advice
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Posted by eric in vermont [Email] (#2058) [Profile/Gallery] (more from eric in vermont) on Tue, 28 Nov 2023 12:06:37 Share Post by Email
In Reply to: Re: Intake Manifold Gasket Sealant, eric in vermont [Profile/Gallery] , Tue, 28 Nov 2023 04:46:16
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It took awhile, but I found Jack's advice on intake manifold installation. My memory wasn't quite complete.

Jack's notes on intake manifold installation are detailed towards installation of a ported intake and ported heads, but I'll relate it here exactly as he wrote it in his instructions to me on assembly of my engine:

"I have had very good luck with cheap clear silicone by Dow Corning caulking tube 732 and use the high temp brown only on exh. flanges. When ready to install intake manifold try this. Clean all contact surfaces and apply a tac coat of clear silicone to all surfaces on heads and block. Put an amount the size of a match head in the 4 lower corners. Set the new gasket into the valley in the proper position. Install manifold and torque in position and aligned. Leave overnight if possible, then remove the manifold. If the valve gear was left off all valves will be closed and the gasket can be cut using an inward cutting motion and pieces vacuumed out after. Treat the manifold with a tac coat plus the blobs in corners and reinstall. A light will show your port alignment thru carb. flange holes."

Clearly, the intent here is to shave away any excess manifold material from the intake path. That's a big deal when you've paid a pile of money/put in a lot of hours for ported heads and matched ports on the intake. It's not such a big deal on a stock engine where the ports are smaller than the holes in the gasket!

eric in vermont


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