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Old 04-05-2023, 04:21 PM
Blackmamba Blackmamba is offline
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Default .004 blower to intake gap

Sorry if I can’t do this but I’m posting a new thread on kind of the same Q..
I had a blower to intake vacuum leak and I checked it out.. I pulled the blower gasket out and I checked the gap between the blower and intake without the gasket and bolted and rebolted the blower down to give an almost real-life-scenario, .004 is the gap I have between the blower case and intake without the gasket and bolted down, I went to .005 and the gauge wouldn’t gap, is this exceptable clearance?… Tia

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Old 04-06-2023, 12:57 AM
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Jack Gifford Jack Gifford is offline
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Not sure I understand. Is there a .004" gap in just one spot, thus indicating a lack of flatness?

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Old 04-06-2023, 07:13 AM
Blackmamba Blackmamba is offline
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Yes, in the very back about an 1” in length from side to side between blower case and intake pretty much in the middle about where the distributor is… this time the gasket did not rip it was leaking air and i looked back on my purchase records to see the thickness gasket is and it’s 1/32 maybe it’s to thin so I ordered one that is 1/16

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Old 04-07-2023, 07:01 AM
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steve25 steve25 is offline
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You will be fine with the thicker gasket and like I posted a light bead of sealer, and yes retorque the 8 bolts after the first heat up and cool down session

I would however like to know if it's the Blower case that has warped or the Intake Manifold back there?

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Old 04-07-2023, 02:50 PM
Blackmamba Blackmamba is offline
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Steve25, I haven’t checked the case yet but I’m going to, I did check the intake with a straight edge and was good..when I check the case I’ll post the results should be a day or two..and by the way thanks for the advice

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Old 04-09-2023, 12:26 AM
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Jack Gifford Jack Gifford is offline
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Quote:
Originally Posted by Blackmamba View Post
... thickness gasket is and it’s 1/32...
Although I never had a problem with 1/32" gaskets, I have a spare that is .046" thick. It says "Interface Performance Materials MP-2N". I think it came from The Blower Shop.
If you do use any sealer, just use it around the blower outlet, not around the perimeter of the blower.

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... or has built a record breaking DOHC hemi four cylinder Pontiac?
... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967)
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Old 04-09-2023, 12:15 PM
Blackmamba Blackmamba is offline
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Jack Gifford, yes. Good point about the sealer…thanks for the heads up

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