Date: Sun, 20 Sep 1998 23:01:14 +0100 From: chrisnopsammum-bhp.u-net.com (Chris Wilson) Subject: Re: Removing balancer shaft chain on 9000 turbo
[As well as this reply in alt.autos.saab a copy was also e-mailed to Ywan Mason ,the cited author.] In article <3605685C.B86A405Fnopsamsouth.net>, ymasonnopsamsouth.net apparently said in alt.autos.saab > The oil pan is sealed with only sealant. breaking it in the front may > bring leaks. I have done the job successfully by only removing the > timing cover and applying locTite 518 anaerobic sealer to both the > cover, lower part of head gasket that is exposed when the cover is > removed and the oil pan. Any excess of this sealer will not dry and > plug oil passages. If you have a worn balance chain, chances are the cam > chain is worn as well. There have been reports of gear wear in these > engines, though I have not seen that. When its apart, make sure the > gears are ok. If I had the timing cover off an engine, I would > definitely replace at least both chains. > > We overfill the 2.3 engine to the X in MAX on the dipsticks. This > doesn't cause any aeration, leakage or other problems. Our regular > customers and our own cars do not have timing chain or balance chain > problems as the overfill allows a bit more oil on the chain. Stick with > a factory filter and use 10w30 oil, preferably synthetic, especially in > turbos. Other viscosities don't work as well and when you go to the ones > with a wider range, like 15-50 or 20-50, the oil is too thick and > contains more additives to bring about the increase in viscosity range. > The additives are what break down and lead to sludge formation and turbo > coking. OK,thanks for the tips,cover now off,and as you rightly say,no sump gasket,just the remains of the liquid gasket used at the factory.Same for the timing cover to block interface.I'll get some Loctite as recommended. Fairly severe wear on the front balance shaft sprocket,and also on the crank balance shaft drive sprocket.Will heed the warning and replace cam chain,and at least the cam crank drive sprocket. The tensioner guide slipper for the balance shaft chain is also badly grooved.Not at all impressed at the state of this area,in what is a genuine 40 K mile car,serviced by Saab main agents until it came to us a couple of weeks back. It came apart pretty easily.Here's hoping it re assembles as straightforwardly....Strikes me both cam and balance shaft chains should be duplex,and maybe one pitch bigger in size.Especially as Saabs are thought of as good for high mileages.Hmmm.. Thanks for the info Ywan and Tim. -- Best Regards, Chris Wilson http://www.maximum-bhp.u-net.com
 |
 |
 |
 |
 |
