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Date: Sat, 1 Dec 2001 12:46:32 -0500
From: "thompson" <>
Subject: Re: Overheating 900S

"Robin Moore" <> wrote in message > My car overheated this fall after losing coolant due to a bad head gasket (see > previous posting). I have also observed that it runs hotter now, apparently due > to the cooling fan coming on later. This is most obvious when stopped at idle. > The garage says that the overheating probably damaged the temp. sensor for the > fan. I have bought a new one which I haven't put on yet. (A cheap fix if you > want to try it). More than likely that's backwards. The overheating caused the head gasket failure. I would change the temp sensor switch but if the fans come on it is probably ok. If the thermostat is ok, the temp switch is working then it's probably your radiator is plugged up. > > Robin Moore > > Don Wiest wrote: > > > Last summer our 900S Convertible threw two belts and overheated, while > > trying to get to a highway exit. Had the car towed to a Saab garage, where > > they replaced the belts (damage caused by misaligned pulley) and replaced > > the thermostat. Since then it runs hot. Not a problem in cool weather, but > > in the summer and with the A/C on it's a problem. Any suggestions? It probably overheated because one of the belts was your water pump. How hot did it get? If it got pretty hot you may have damaged your head gasket (or head). If you are not losing coolant and there is no water in your oil I'd suspect something else though. Check to make sure the fans are turning on when it gets up to temperature. (with the a/c on I believe one fan runs constanly) If the fans are not coming on disconnect the two wires on the radiator thermo-switch and see if they run. If they do not then the fans are faulty, if they do then the switch is faulty (or maybe some wiring too.) If everything checks out then check the following - thermostat, radiator, waterpump (in that order). >

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