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'94 850T-Temp gauge dropping slightly. Seems random.

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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1997 - 2000 V70, V70 AWD
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rspi
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rspi

Re: '94 850T-Temp gauge dropping slightly. Seems random.

Post by rspi » Sat Feb 27, 2016 8:46 pm

Wahler. Probably 80,000 miles.

I'd just order one.
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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IG-88A
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IG-88A

Re: '94 850T-Temp gauge dropping slightly. Seems random.

Post by IG-88A » Mon Mar 07, 2016 5:42 am

I wanted to report back in, as I don't like to leave loose ends on here. No matter how trivial the issue. Over the weekend, I drained all the coolant to replace every coolant hose on the car, including the firewall coupler and heater core. This was the perfect time to drop in the new thermostat. My temps are now reading constantly in the 190s while driving, according to the scan gauge. And once up to operating temp, the factory gauge never leaves the 3:00 position. So, even a thermostat with around 10,000 miles on it can go bad.

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regent
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regent

Re: '94 850T-Temp gauge dropping slightly. Seems random.

Post by regent » Mon Mar 07, 2016 11:22 am

Yes,

You might just get a bad one once in a blue moon...
The needle does not have a "linear" behaviour with changes in temperature for a very good reason: driving while staring at the gauge would be too risky :shock:
Thanks for posting back!
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