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Join Date: May 2002
Location: Tioga Co.
Posts: 5,944
Too cool?

Due to a waterpump problem on the wife's Durango, the 944 was pressed into emergency service. It hadn't been driven since October, and had been on stands in anticipation of a belt R&R. The waterpump stymied me (I now hate Dodge), and we needed 2 cars, so I buttoned the Porsche back up and drove it to work today. It never warmed up though. The temp gauge moved, but never went above the bottom mark, and I had hear, but the air never got beyond warm. My oil (a summer weight), always made good pressure, in fact it was at about 4 at idle (normally at 3). I am assuming the thermostat stuck open. Does that sound reasonable? I mean I had plenty of time for the engine to warm up (lots of hills about 45 min drive), and the temp gauge did move, it would fluctuate from very bottom of the fat bottom line to the middle of the line, occasionally to the top of the line. The top radiator hose got warm, but the bottom one was not even warm. It was about 20 F on the drive.

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Old 02-12-2007, 06:56 AM
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Join Date: May 2005
Location: Brentwood, Tennessee
Posts: 376
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It sounds like the thermostat. If the car warms up sitting in the driveway but cools back down when you drive it, it is probably the thermostat. There are a few other items to check: Temperature switch on radiator-were the fans running? (One usually keeps running after the car is off and runs the battery down when the switch fails.) Air lock? Make sure that all of the air is bled from the cooling system. The bleed screw is on the elbow where the upper radiator hose connects to the head. You will need a 12mm wrench or socket. I usually raise the front of the car to bleed this and make sure the heater control valve is open. Also make sure the heater control valve is not leaking. Enough antifreeze?

Old 02-12-2007, 09:23 AM
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