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Originally Posted by Fred Demara
yes, of course.
but if you're rotating the crank, and you're off by 1degree, it's possible to rotate the crank several times before the valves met the piston and feel any kind of resistance...so knowing how many times you turned the crank will allow you to return to the starting point.
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OK... we mostly agree. I just would not personally tell anyone who suspects a timing problem to rotate the crank, esp. on the net where I'm not able to see for myself how far off it may or may not be.
Another thing occurs to me though. If installing a belt, has the lister checked valve for adjustment? If not, and the car uses the old inverted bucket-type tappets (lots of Brit cars, SAABs etc. use this), it's necessary to pull the head to rotate the cams to check the valve clearances, then mic the shims to determine which have to be swapped and by how much. It's an ugly job which basically needs to be done twice to be sure everything's correct. If this is the case, your manual will give you an OK range for the valve clearances. If such, you want to set the valves to the most generous setting within the OK range because as the mileage piles up, the valves get pushed deeper and deeper into their seats closing the gap between the tappet and the cam lobe. Setting the clearances to the maximum allowable spec prolongs the time that the valves will remain in spec before needing to do the procedure again. I'm not certain the FIAT Twin uses this method, but if so, it's worth doing this work before installing the T-belt.
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