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By skidoorulz - Last Month
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What would the symptoms be on a 292 if by some chance when we assembled the motor, we got one pin off on the timing chain. Set it at 13 pins or 11 pins.
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By Ted - Last Month
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11 pins would likely show the cranking compression to be much higher than expected. The engine would probably start up and idle just fine though but would peak out early under throttle. 13 pins might have the engine slow to start up and the cranking compression would be low. Overall performance of the engine would be sluggish.
Easy enough to check if the timing set is a tooth off without pulling the timing cover though. With the passenger side valve cover removed, rotate the engine so that the #1 cylinder intake and exhaust valves are on the overlap cycle. As the exhaust valve is coming up (closing) and the intake valve is just starting down (opening), place a short straight edge on both valve retainers and rotate the engine clockwise looking from the front so that both valves are level with each other. Then look at the damper and take note where the pointer is in relation to TDC. If the cam timing is correct, it should be no more than 6° from TDC. Preferably before TDC. If you find the pointer ~18-20° or more from TDC, then odds are good the chain is one tooth off.
If pulling the driver's side valve cover, then the same as above would hold true for the #6 cylinder. Both the #1 and #6 cylinders share the same TDC on the damper.
Other comments are welcome.
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