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Old 07-09-2012, 12:46 PM
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Idle circuit screws keep backing in and out

Hey guys, got a proform double pumper on my 6.0 LS motor. I am having trouble with the idle circuit screws moving around. I get them tuned just right and then after a couple rides they are in a different spot. One even fell completely out and was laying on the intake.

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Old 07-09-2012, 12:59 PM
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they must be pretty worn. try wrapping some Teflon tape around them a few times.
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Old 07-09-2012, 01:24 PM
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they must be pretty worn. try wrapping some Teflon tape around them a few times.
Its funny you say that. Carb only has around 3k miles.
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Old 07-09-2012, 01:29 PM
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Quote:
Originally Posted by scapegoat View Post
Hey guys, got a proform double pumper on my 6.0 LS motor. I am having trouble with the idle circuit screws moving around. I get them tuned just right and then after a couple rides they are in a different spot. One even fell completely out and was laying on the intake.
Is there a place for the cork seals like Holly carbs use to keep their idle mixture screws tight?

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Old 07-09-2012, 01:32 PM
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Is there a place for the cork seals like Holly carbs use to keep their idle mixture screws tight?

Wondering now if it came with them or not. I will go take a look.
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Old 07-09-2012, 07:43 PM
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Some require springs
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Old 07-10-2012, 03:34 PM
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Some aftermarket blocks take an rubber O-ring instead of the standard Holley cork gasket.

Should be one or the other though, to prevent air leaks and the problem you have of vibration making them move.

No springs are used here
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Old 07-10-2012, 06:19 PM
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Well guys I just checked and all four screws have the cork/paper gasket thing. I don't know why they are moving.
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Old 07-10-2012, 06:28 PM
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Quote:
Originally Posted by scapegoat View Post
Well guys I just checked and all four screws have the cork/paper gasket thing. I don't know why they are moving.
I suppose there's a chance the cork has dried/shrunk, if in doubt, install a fresh set. Might as well get the new screws to go w/the seals if they're the same as yours- it's actually cheaper to buy the idle screws and seals than just the seals!

If there's a NAPA or other good parts store in your area you can look through their rubber O-rings for a suitable replacement for the cork seal. I can guarantee you the rubber O-rings will be a LOT cheaper than buying the cork seals from Holley, you can get a lifetime supply for the cost of the cork ones.
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