Re: Piston to valve clearance.
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Re: Piston to valve clearance.



I'm sure it can be answered better by others but it sounds like your new engine is an interference engine.  Several cars feature interference motors. An interference engine means that the tolerances are so close that if the timing is off even just a hair, the valves will hit the pistons. This could cause damage from a ding in the piston or it could completely destroy the interior of the engine.  I can offer no advice how to measure it or help you set it up so that the valves won't hit the pistons, other than making 100% sure that the cam timing is perfect.  If it's off even 1 tooth it can screw the motor (valves, pistons, connecting rods, crank, heads...etc)
 
Lots of cars and trucks have this kind of motor, it's really not as scary as it sounds.  I'm sure somebody else can better advise you.
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Eric
Tacoma, WA
1962 Chrysler Newport 2 door HT

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