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Old 05-01-2005, 05:29 PM
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piston to valve clearance

on a 302 ford..actally its a 347 now..how much clearance is needed on the piston to valve clearance

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Old 05-01-2005, 06:57 PM
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It depends on your valve reliefs and what type of head used.
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Old 05-01-2005, 06:58 PM
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0.100" at any point is safe.

Larry
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Old 05-02-2005, 04:52 AM
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clearance

.080" intake / .100" exhaust on a steel rod engine with normal piston to wall clearance. If you have excessive piston to wall clearance the piston will "rock" in the bore a reduce the p/v clearance. If you can be 100 percent positive that the engine will never go over 6500 then you can reduce those numbers by .015" each......

If you are close make sure you check your clearance in running condition... Do not use the light checker springs....

Keith
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