General Category > Quadrajet Carb Talk and Tips

Primary throttle shaft side play

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kjvforme:
What is to much side play on the throttle shaft before it needs to be bored and bushings installed?  I have a dial indicator wondering the readings that you go by.

Cliff Ruggles:
They all need bushings, as the factory clearances are simply too great and can allow unfiltered air to enter the engine, not to mention are a slight vacuum leak at idle and effect tuning, etc.

Our kit reduces primary throttle shaft play to less than .001".....Cliff

kjvforme:
Wouldn't less than .001 be concidered an interference fit?  How do you keep the shaft lubricated when it's that tight?

Cliff Ruggles:
The bushings we use are self lubricating, some sort of oil impregnated bronze material....Cliff

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