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intake manifold gasket problems?

Old 05-07-2003, 07:08 AM
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Default intake manifold gasket problems?

I cant keep the rubber front gasket from squeezing out when I torque down the bolts 30ft.lbs I tried several times and it just keeps pushing out. Has anyone else had this problem?
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Old 05-07-2003, 07:22 AM
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Throw it away and put a nice thick line of black RTV in its place. Then go a head and torque your manifold. No leaks!
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Old 05-07-2003, 07:31 AM
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Before you place any gaskets on the block or manifold, pre fit the intake on the block. Make sure you have sufficient space for the front and back gaskets. This will tell you if you have room for gaskets or just sylacone sp.

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Old 05-07-2003, 08:49 AM
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THRILLSEEKER,

BLACK RTV IS THE ANSWER
 
Old 05-07-2003, 10:46 AM
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Originally posted by Scott
Throw it away and put a nice thick line of black RTV in its place. Then go a head and torque your manifold. No leaks!
I totally agree. Just make sure you don't need to run it that day. It will take it a couple days for silicone to set up properly. I usually dry assemble to see how thick a layer of silicone I need so as to not have to little or to much and have it come loose and end up in oil pickup screen. Until I went to the one piece pan gaskets I used to use silicone on the ends there also.

If you insist on using rubber end seals glue them in place on one side. I used to glue them to the block. DO NOT use silicone it will just act as a lubricant and they WILL slide out.
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Old 05-07-2003, 04:13 PM
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The trick to a bead of silicon working is cleaning both surfaces with laquaer thinner before applying. I use High temp RTV or Dow 732. Both work well.

BT
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Old 05-07-2003, 04:25 PM
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Ultrablack is it, and, yea, clean well and dont touch it till its completely cured.
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Old 05-07-2003, 05:50 PM
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Clean and Ultra Black or equivalent. I have dynoed engines with this sealing method 30 minuits after assembly with no problem.
Do prefit the manifold and be SURE you have some clearance at the manifold ends for the silicone-if the manifold sits in contace with the block, you will have many problems!!!
 
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