Temp Issues in High Country - Defender Source
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  #1  
Old February 20th, 2011, 10:20 PM
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saber6
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gh
97 D90 SW
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Question Temp Issues in High Country

So I left from the coast and into the High Sierra's today with my 97 D90. When I was in the 5k foot (altitude) range I noticed my temp gauge plummeted to the very bottom (exactly what it looks like when you start it in the morning). Obviously alarmed I pulled over within minutes and checked all fluids, coolant, oil, trans, master cylinder, etc..., all was where it should be but the engine was very cool to the touch. In fact when I opened the radiator cap it hissed for a second but not to the extent that the engine was really hot and potentially out of coolant which is why the gauge could have read COLD. In the last couple of hours the gauge will get to the 1/4 mark but never to the 1/2 mark where it typically runs.

Thermostat is fairly new

outside tem is 30 or colder

altitude is 5k or greater

truck is serviced regularly and all up to date

What do you guys think, what is wrong with my engine temp or gauge, or is it just the area I am in... Thanks in advance!!
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  #2  
Old February 20th, 2011, 10:25 PM
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Kevin Buckley
1973 coiler
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Thermostat stuck fully open?
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'73 SeriesIII coiler,"The Goat", Daihatsu 2.8TD,Santana,Ashcroft,ARB's,etc., now SOLD
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  #3  
Old February 20th, 2011, 10:43 PM
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How do I close it?
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  #4  
Old February 21st, 2011, 09:31 AM
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Chris Snyder
1994 D90 #614 | '07 L322 SC
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Take it out and check in water with a thermometer. If it's stuck open or opens prematurely (which is probably is) replace it.
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  #5  
Old February 21st, 2011, 11:17 AM
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Roger that! Thanks Gentleman.
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