Date: Tue, 29 Apr 2003 08:11:42 +0100 From: "Andy Hookins" <andrew.hookinsnopsamamnopsamodata.co.uk> Subject: Re: Need the wear limit for a '93 SAAB 9000 CSET timing chain
"SimonJ" <Menopsam.net> wrote in message news:b8k01k$10f$1nopsamules.btinternet.com... > > "Fred W." Aedra.7177$Jf.3701013nopsam1.news.adelphia.net... > > I have the engine torn down for a head gasket and when I took the timing > > chain tensioner out I have exactly 11mm of distance between the tensioner > > body and the back side of the pusher. I found a web site which says that > > for SAAB 900's with the same type of tensioner the wear limit is 11mm. It > > doesn't say what years it applies to. > > > > Does anyone have a spec for this or know where I can find it? I've > checked > > in my Haynes manual and also the AllData CD-ROM I have for the car. One > of > > my concerns is that if the timing chain has worn too much that the > balancer > > shaft chain may be in the same shape. This means I would have to remove > the > > timing cover (means pulling the crankshaft pulley off) to get at all that > > stuff. > > > > Otherwise, I suppose I could just stick in one of the new chains with the > > masterlink as a prophylactic and hope for the best... > > > > TIA, > > Fred > > > > > Last on I did (1992 9000 Carlsson 2.3T) Had about 11mm on the tensioner, but > the timing chain looked OK. When I stripped it, the teeth on the balance > chain sprockets were very well worn, and in urgent need of replacement. > If the timing chain is worn, you can pretty much bet that the ballance chain > will be far worse. > I second that - 11mm is the upper limit for the timing chain tensioner. Also the balance chain and sprockets tend to wear much more than the timing chain. Since you're half way there I'd seriously consider taking off the timing cover. Replace both chains and the sprockets for the balance chain. If you can afford it, also replace the chain guides. The chain tensioners should be fine. Check and replace as necessary the plastic pulley wheels and serpentine belt whilst you're there. AndyH '94 9000 CDE
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