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Overheating 1999 volvo v70 tdi

Gauge stays halfway point for about 10 miles or so, then it will rise quickly up to near the red sector on gauge. Stop for around two minutes and switch off, then when restarted the gauge usually goes slowly back down to half way point again over the next couple of miles. When it is running hot the engine loses some power. The heater control valve under the dash decided to expire last week and i have put a temporary bypass on the heater hoses till i can get around to tackling the job.

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Sounds like the thermostat may sticking shut.

Posted on Feb 16, 2012


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Hi, I have a 1999 Volvo S80 2.4 auto. Recently the temperature gauge on the car either has not moved to the halfway mark (it only moves a couple of bars) and will stay there or it will, after a short

Typically a thermostat stuck open will cause the gauge not to move because the water/engine will not heat up. If you havent already, I Suggest you see if the local Advanced auto,dealer or someone who can read the engine temperature with an infrared thermostat so you can see if the problem is the guage/sending unit and also read the fault codes if you have check engine lights of any kind on your dash. With these codes I will be able to tell you exactly what needs to be fixed/replaced. Could be an ECU, sensor, relay, fuse, bad ground etc. My name is Tim, I work for a company called AutoEcu1 we see all kinds of different ecu ecm tcu tcu abs ebcm throttle body climate control etc etc etc from any given vehicle about 1986 up 2011 or newer. I am more then happy to help you resolve this quickly and correctly feel free to post here or call when you get the codes or if you have questions.
800 921 9060

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'96 Honda Civic overheating. temp gauge will rise almost to the red & then after a few seconds drop quickly to where it should be. After about 40/50 miles tends to hover at the high point. water is...

You need to have your system pressure tested. There is obviously a leak which is causing an air pocket. The pocket causes the temperature fluctuations. This could be as simple as a pinhole leak that caused the pocket over time or as complex as a head gasket allowing pressure to build up in the coolant system can cause fluent to leak out the overflow.

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Temp gauge will rise quickly then instantly pin in red and oil light comes on. Continue driving, after couple of minutes it will go down. The rise quickly and do it again, sometimes causes overheat sensor...

If this truck is not overheating, then I would suspect the temperature sensor, if it is overheating then this must be repaired first. The sensor should be mounted in the intake manifold. Hope this helps, let me know

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1999 volvo s70 overheating

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sounds like you could have faulty gauges to meby check them out.... and yes its posible that its pluged

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