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Originally Posted by mrprogrock
Yes, I had been reading in this forum about how a bad timing belt tensioner could cause a knock like that. Would that cause the smoking too?
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No, it wouldn't. You should do a compression test on it to rule out a worn piston, rings, bore or all of the above.
How many miles does it have?
Valve guide seals cause engine smoking after the morning startup:
http://www.automotiveforums.com/vbul...d.php?t=196724
Dale