Date: Sun, 17 Jun 2001 14:49:04 GMT From: Tony <NOSPAMtshiminopsam.com> Subject: Re: '91 Saab 900 overheating
Replace the radiator temp sensor. As to why the left fan is not working, you may want to re-check that you inserted the fuse O.K.; but it also may need some time (minutes) before it restart. And for Sure replace the strait water with good coolant fluid. Brian Dean wrote: > I have a 1991 Saab 900 with the 2100 cc engine, manual transmission and ac. > > Beginning yesterday the engine temperature gauge is indicated "HOT". > It has never done this in the past couple. > When this hot condition was notice, we added about 2 quarts of water to the > coolant reservoir. Since then the coolant level has not changed and their > is no evidence of leaks. So I am assuming the slightly low level is > unrelated. After running about 10 minutes it is "HOT" and I shut it off. > > The v-belt on the water pump is fine. and the pump seems fine. > > The thermostat was my next thought, but the upper return hose on the > radiator is hot ... so I am assuming that the thermostat is open and likely > working fine. > > The fans seems suspect to me. When I first noticed the Hot condition only > the left fan was working (left from the drivers seat position looking > forward at the fans). I assumed the right fan only worked when the air > conditioner was on so I turned it on and it still didn't spin. I check the > fuses (number 6 and number 25) and they are fine. > > Not sure why ... but I pulled out the fan low current relays (both of them) > and they looked fine (???) so I stuck them both back into their sockets. > > When I started it the car ... now neither fan was turning... and the engine > is hot and the air conditioner is on. > > So I jumped out the radiator temp sensor and the right fan starts to spin... > so I am thinking perhaps the radiator is not hot or perhaps the radiator > temp sensor is shot... and I am still wondering why the left fan has decided > to stop running ??? > > Any ideas or know issues that I should be considering??? > thanks, > Brian
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