Quote:
Originally Posted by Tomguy
I think 1 crank tooth would be 40° whereas 1 cam would be 20° but I don't have any of the gears in front of me to double-check. Either way I doubt you'd be off a tooth and run reasonable at all since your timing chain, if original, probably has 10°+ of wear / stretch in it. Mine had about 12° and I replaced the chain, leaving the original aluminum-backed rails, and that got it within 2-3°.
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We don't have confirmation from Adv_rider yet, but it does sound like the chain is likely stretched. It the marks on the passenger side camshaft were aligned, and there was say 10deg of chain stretch, it is easy to see that the distributor would not be in design position.
Best to set crankshaft at TDC, then insert distributor. Because of the short piece of chain between the crankshaft sprocket (8) and distributor drive sprocket (3), the distributor should then be positioned approximately correctly even if chain has stretched.
If at this point, passenger cam marks are more than say 5 or 6 deg off, then time for new chain and perhaps sprockets, if they are worn.
Bear in mind, I am no mechanic. Just an owner who has done this once!
This pic shows the chain routing and might help understand why chain stretch would throw the distributor position out.
