Date: Fri, 29 Sep 2006 09:43:36 -0400
From: Fred W <Malt_Houndnospamm-me-not*>
Subject: Re: replacing Crank Position sensor

Saab1993 wrote: > The car does seem to run a little hot, with a lot of range on the > gauge. This might be normal, the car is new to me and it is my first > Saab do I'm not sure what is normal. I did replace the coolant > thermostat with a new OEM Saab one. This did not make much difference > in the temp. The car does usually die at a normal operating temp (half > way up the gauge). These cars were notorious for running hot and over-heating. In the event they do overheat you can eventually expect to have to replace the head gasket, which is a chore. To prevent that from happening, you want to replace the thermostat (again) with a lower temperature one. The stock SAAB t-stat was an 89 degree C (192F) type. There are replacements (even OE SAAB) 82C (180F) degree ones available. The second, perhaps even more important modification is to replace the fan thermostatic switch with a lower temp model. The problem here is that when the car is not moving, or only moving slowly, there is not enough air to keep the coolant in the radiator cool. The original switch doesn't turn the fan on (or to high speed on 2 speed fans) until too late, when the coolant is already hotter than the temp we want to cool the engine down to. There is a bunch of good info on the cooling systems for these cars (including the lower temp switches) here: I made these mods to 2 9000's of this vintage and they both had zero cooling problems afterwards. -- -Fred W

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