Date: Mon, 8 Nov 2004 11:32:24 +0000 (UTC)
From: Craig's C900 Site <>
Subject: Re: Running hot

John B <> writes: >On 05 Nov 2004 06:24:53 GMT, LauraK <lkrznospamcomnospam> wrote: >> >> Assuming there is water/coolant in the radiator/overflow tank, it probably >> needs a new thermostat. Check the records to see if it was replaced recently. >> It may be an easy do-it-yourself job, depending on how much you've got to >> remove to get to it. >> >Also might want to check that the radiator fans are working properly, and that >the radiator fan temperature sensor is working. >I used to have a similar hot-running problem, which went away with replacement >of a faulty radiator fan. An interesting observation with my two C900's (1982/83 and 1985). With the 1982/83 one, only the right-hand-side fan (driver's side, right-hand drive) runs when the thermo-switch cuts in, but in the 1985 one, both fans turn on. The right-hand fan is probably the more important one anyway since the exhaust manifold is on the right-hand side of the engine bay. The left-hand fan in the 1982/83 car only turns on when the air-conditioner in operation (haven't worked out if it runs continuously when the A/C is on as yet, or if it's controlled with a thermo-switch). Is that indicative of a problem with the older of the two cars, or is it a design difference that's represented by different wiring of the fan circuits? When I get the chance I'll try to trace the wiring for each in the circuit diagrams printed in the Bentley manual but I'll need to be well-rested to make sure I can trace the circuit paths on the small-scaled diagrams properly. 8-) Regards, Craig. -- Craig's Saab C900 Page --> http://nospam/~c900 Sydney, NSW Australia Craig's Saab 900 Workshop -- For all Saab C900 and NG900 Enthusiasts world-wide! http://www.nospam Come and explore our site, and check out our web-forums, mailing list, etc.

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