Date: Fri, 28 May 1999 08:58:18 -0400 From: "kwbrewer" <kwbrewernopsams.com> Subject: Re: Overheat
sounds like your thermostat is not opening completely.......if its never been replaced i'd start there. Olivier Templeovski <ollietnopsamo.com> wrote in message news:7ion13$h40$1nopsam009a.netvigator.com... > About a week ago I noticed the temp gauge on my '93 9000 CSE at 2/3. It's > never previously gone above 1/3. I switched on the AC (to ensure the cooling > fan was on) and it didn't get any higher during the rest of my journey > (about 10 mins). Checked coolant level next day and it was fine - and temp > has been normal until today.. > > The gauge again went up to 2/3 (quite suddenly). Didn't switch on AC this > time and a few minutes later whilst parking at home I noticed a lot of steam > coming from the expansion tank area. The gauge was close to the red (though > not in it). > > Switched off and heard it boiling. It was also dumping water onto the floor > (from expansion tank cap). I reckon about 1.5 liters was lost. The fan came > on about a minute later (a tad late) so I'm assuming that the fan switch is > at fault. > > Is it normal though for water to be lost from the expansion tank cap before > it enters the red zone on the gauge? Could it be that the cap is faulty too > or would a fault somewhere else in the system cause it to boil prematurely? > > More to the point how do Saab heads behave at high temperature? Is there any > chance that it could have warped (it's cooling down as I write this). I also > wonder if a sudden dump of water would cause the temp gauge to under-read > (if there is not enough water in the head to surround the sender.) > > Any advice would be much appreciated - I don't rate the local Saab dealer > very highly and would not be at all surprised if he mis-diagnoses it.... > > Olivier Templeovski > '93 Saab 9000 CSE > >
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