Date: Wed, 20 Aug 2003 13:04:33 GMT From: 'nuther Bob <norealaddynopsamphonydomain.com> Subject: Saab TSB - Retorque your head !
Saab has issued a TSB regarding re-torquing the head. It covers some specific years but those of us with earlier motors may want to take note and consider it. Read on, see the TSB below. For those not familiar with the issue, some Saab 2.0 and 2.3 head gaskets sometimes develop leaks. Some theorize that the bolts are too tight and that the movement (expansion) of the iron block against the alum head causes wear. The solution would appear to be less torque on the bolts and Saab did in fact issue a TSB for the NG900 years suggesting that a (if/when) replacement gasket be install with _less_ torque. Other theorize that the bolts were simply left too loose in manufacturing. There's some evidence of that. I and others have checked and found that a couple head bolts were too loose. I myself had a very minor seepage at a corner and sure enough, that bolt was very loose. I took a risk an re-torqued the head. The danger is that tighter is worse. So far, so good for me. Saab has now issued a TSB suggesting re-torqueing. I don't pretend to know if you should do it as a preemptive strike or if you should do it on engines in the '95-'99 model years. Make your own decision. At least the TSB settles the question of whether or not you need to replace the head bolts when you do this. TSB: http://www.genuinesaab.com/psi/headretorque.htm Bob