1994-2002 [Subscribe to Daily Digest] |
According to the saab tech training book for the B234, which was the first balance shaft engine, the shafts reduce vibration above 2800 rpm. Motor mounts reduce vibration below that. The larger the displacement of the engine, the more it vibrates (inline 4 versus v6 or v8.) If Volvo used a 2.3 with no balance shafts, how much did saab need them? They were always engineering theirs to be the best car, and wanted to compete with BMW in terms of smoothness. Do they make a difference, YES. How much of one? After working at the dealership in the late 90's and seeing how many failed, I thought they were pretty crappy. Now that the cars are not worth 25000 bucks, can I justify selling a customer a new chain for $2500? If it fails, it usually falls into the real timing chain and breaks that too, then valves and pistons hit and you need an engine! If you ever look at how flimsy that chain is compared to the timing chain, you won't want it in your motor. It looks like something that belongs on a garage door, not an engine
I got the suggestion to cut it from a friend who is held in very high regard in the Saab community around here. I have cut at least twenty, one person thought they noticed more vibration at idle (impossible according to what the engineers who designed the engine said.) When my NG 900 needed an oil pan, I cut it. I can't notice any difference, and I have been fixing Saabs for fifteen years.
If the oil pan is off and you want to save yourself trouble down the line, cut it. If your worried about the vibration, leave it, you can always remove the pan and cut it later. I just don't like loosening the subframe if I don't have to. It creates no problems if it's not there....
Any questions, drop me a line-
posted by 71.222.10...
, Thu, 7 Jun 2007 08:41:25, Thu, 7 Jun 2007 13:55:01
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
