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Discussion Starter · #1 ·
Hey! the head basket on my 99 Saab 93 blew and i took it to the machine shop recently got it back. I install the head back in the car. with the camshafts mark align and the crankshaft as well, but when i put the timing chain tensioner on the crankshaft move of the mark. Now i am kind of concern don't want to start and mess up the valve. Any help getting the right timing will be appreciated thanks
 

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Hello, I did the same repair on my 99 9-3. Are you saying that the crank shaft marks moved when you put the chain tensioner in?
 

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Its extra work, however I think I did the same thing, but the head was still off. I noticed that my pistons were not completely at TDC. So while the head was still in the shop, I held the chain straight up, to keep tension and not let fall, and then turned the crank to the correct mark. As long as the timing chain is not mounted to the head yet, then you can adjust the crank pulley mark. I was worried, however once bolted back, the car was fine.
 

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Discussion Starter · #5 ·
Its extra work, however I think I did the same thing, but the head was still off. I noticed that my pistons were not completely at TDC. So while the head was still in the shop, I held the chain straight up, to keep tension and not let fall, and then turned the crank to the correct mark. As long as the timing chain is not mounted to the head yet, then you can adjust the crank pulley mark. I was worried, however once bolted back, the car was fine.
my concern is that after i lined everything to their prospective mark(camshaft, crankshaft). when i put the timing chain tensioner on they move. I will double check everything again before i start it up hopefully everything turn out fine.
 

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Discussion Starter · #7 ·
How much do they move? One chain links' worth or less?
more then one chain link. i want to know if that is normal? i lined everything up to their mark and they move when i put the timing bolt tensioner in, so i am guess that's normal.
 

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I have no personal experience yet with Saab engine innards, but a chain links' worth of movement of the cams compared to stationary crank is in my book too much. No idea why, unless the chain wasn't taut upon refitting between crank sprocket and exhaust cam sprocket.
I'll have to hand the baton over to more knowledgable minds at this point
 

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You might want to pull the chain tensioner and see how far it's extended. IIRC, 13-15mm is the limit, which means the chain is worn/stretched... Ron
 

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Make sure the tensioner is removed while installing chain and Ron's 15mm figure is correct.

The last 2 chains I've installed I was able to move the crank pully about 3/4" inch to the right before the chain pulled/moved the cam gears so I had to start over.
 
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