Date: Sat, 15 Aug 1998 10:31:36 -0700 From: Justin VanAbrahams <jvanabranopsamnet> Subject: Re: Water Vapor from Exhaust 85 900S
johnny.herrera wrote: > > Hi everyone, I need help, I think it is the head gasket, but I need more > opinions. Yesterday I replaced the pilot bearing on the flywheel, it all > came out good (I should of done that when i did the clutch change a few > months ago). Today I noticed that the car was getting hot and there was no > water in the reservoir and there has been water vapors coming out of the > exhaust and the end of this is getting very hot (near the rear bumper). I > had this car since 91 and it wont quit. I think it is the head gasket but > not sure. I did a compression test and got this results: > cyl # 1---- 180 psi > cyl # 2---- 180 psi > cyl # 3---- 175 psi > cyl # 4---- 176 psi > Is that a good reading? I don't know what the values are. I am not sure, but I think those are a little low for a 900S... They are about right for a 900 turbo, but the 900S's compression ratio is roughly a full point higher (10:1 instead of 9:1) so you might wanna double chek... Oh, y'know what? I have a haynes manual for my 9k right behind me ... lemme look Yep, 10:1. If there is steam/water vapor coming from the exhaust, it's pretty likely you've got a bad head gasket. There really isn't anywhere else that coolant comes into contant with the fuel/exhaust system.... Power Steering Fluid will also cause white smoke, but that never interacts with the engine... When my '88 900T developed a problem with its head gasket, it compression checked almost perfectly, but would burn through a full fill of coolant in about 40 miles. Wasn't pretty. A small rupture in the head gasket between the #1 cylinder and one of the coolant passages was enough to suck coolant in but not enough to seriously upset engine running... One evening and a new head gasket fixed everything... It's really quite easy... ~$100 will get you a full gasket kit at any dealer, which includes the head, intake, and exhaust gaskets. It's worth doing... > Now the Saab just developped an oil leak from the belts area after my wife > hit and killed a cat (a black one by the way- what a luck for the cat). I > wonder if it is coming from the oil pump and the seal at the crankshaft, any > ideas where to start checking and what I have to do to get it repaired. I do > my own repairs. The oil leak could be anything. If it's coming from the belt area it could be your crankshaft seal, which will eventually go bad. It's not too bad to replace if you've got facilities to pull the engine. I would take it to some cheesy garage somewhere and have them diagnose it, then fix it yourself. Putting it up on a hoist would allow you to pinpoint the oil leak a lot easier. The steam from the exhaust Good luck... -Justin
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