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1995 Chevrolet Lumina Question: RTV SILICONES FOR SEALING INTAKE MANIFOLD OUTSIDE SIDE-WALL

 

Question

carzen, Moorpark, CA, May 30, 2013, 10:45
 Rookie

Could someone recommend me a good sticky RTV silicone for sealing Chevy GM 3.1L 95, lower intake manifold outside side-wall to engine block? GE RTV IS803, Loctite RTV, or Permatex?

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  • Answer #1

    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 30, 2013, 12:40
     Master

    USE DEALER GASKETS AND SILICONE

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    carzen, May 30, 2013, 13:15
     Rookie

    Thank yoy for reply. There is no gasket needed though, this is a lower-intake sealing without removing it from the top of engine block and sealing the ridges. It is a sealing at the outside side-wall between lower intake bottom and the engine block.

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    pushrod, May 30, 2013, 14:00
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     Master

    How are you going to seal it without removing it? Wiping RTV on it aint going to work! Figured you had this problem solved by now!!

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    carzen, May 30, 2013, 14:14
     Rookie

    The current recently-applied lower intake RTV sealant is not leaking quite a lot of oil. So, I like to try seal it from outside along the side-wall, with a higher viscosity (very sticky) RTV, which can make a thick RTV wall (throwing lot of RTV at the leak!). Some RTV like GE IS803 is stated to be able to seal vertical metal surface with sufficient thickness, but I never use it. So, I am soliciting for recommendations, Thanks!

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