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Registered
Join Date: Nov 2001
Location: San Antonio, TX
Posts: 250
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Intake manifold gasket/ sealant?
Replacing the intake gaskets on my 85 this weekend. Are these installed dry or with a sealant?
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02-22-2002, 06:15 AM
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Registered
Join Date: Jul 2001
Location: Woodbine, Maryland USA
Posts: 251
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Mike
When I converted to Webers, I used no sealer on the gaskets. I have had no leaks since then and that was quite a few years ago!
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John 1972 911T Coupe PCA- Potomac Region |
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02-22-2002, 04:58 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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No sealant. Just remember there's twelve gaskets. One on each side of the plastic spacer block.
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Kevin L '86 Carrera "Larry" |
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02-22-2002, 06:36 PM
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Registered
Join Date: Nov 2001
Location: San Antonio, TX
Posts: 250
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Manifold is off now and I have been busy scraping off 17 year old gaskets. Using single edge razors, gasket scraper, and putty knife I have scratched the aluminum surface of the heads no matter how slow and careful I was. I am now wondering if the new gaskets (OEM Porsche) will effectively seal the surface with these new scratches. Scratches are not gouges, but they are visible and the surfaces are not like the beautifully milled surfaces they were before. The new gaskets seem pretty stiff, so I am wondering.... still put in new gaskets dry, no sealant?
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02-28-2002, 03:22 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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I'd smooth the surfaces with a 3M Scotchbrite pad. Put a shop rag in the port to keep the debris out. When you're ready to remove the rag, give it a quick yank to keep the stuuf from falling in.
If you've still got some more surfaces to clean, try a solvent that'll reduce the amount of heavy scraping. I know Permatex makes a gasket removing spray. I'm sure there's others. http://www.permatex.com/auto/autouh.asp?f_call=get_item&item_no=80646 I'd still install them dry.
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Kevin L '86 Carrera "Larry" |
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02-28-2002, 05:32 AM
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Registered
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Mike,
If it were my engine, I would reseal the manifold gaskets with GMS sealer...probably the commonly overlooked and critical areas of lost performance. (tightening is not enough!) In time they will harden, get loose and eventually leak without sealer. What I particularly like about GMS sealer is designed for intakes so it never hardens to the point where you would not be able to separate from the manifolds easily and yet forms a very effective barrier against vacuum leaks. Cheers, Joe |
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02-28-2002, 09:50 AM
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