volvo t5 overheating

Seeing as coolant is obviously circulating the heater, but apparently not the radiator, first port of call would be the thermostat.

Tim.

Does the radiator get hot? If it's cold its the Sticky thermostat.

-- Chris

Fan switch? Can be easier to change than a stat and caused my Golf to overheat in traffic.

does the radiator get hot? If it's cold its the Sticky thermostat.

Sort of located the problem.Top hose hose clip was rusty at the radiator and the fins of the plastic radiator had traces of wet.Tightened up the top hose clip and went for a spin ran fine until I used the turbo at 4000 revs-temp went up.Got back home and there are tell tale signs of wet on the radiator under the top hose but now starting below the turbo coolant pipe take off I find it difficult to believe the coolant pipe joint is leaking.The top hose is less than a year old-its a Volvo part-but-Ive never been happy with its appropriateness for the job. There is very little coolant loss and the top hose is pretty hot-the radiator is just warm. The thermostat is looking pretty suspect.

We wouldnt expect the gauge to rise above normal whilst driving along though. Stationary yes perhaps.

On the 800/70 series, the gauge is driven by the ECU from a single CTS. The gauge doesnt deviate from mid position unless temp rises very high, inwhich case it goes to the red in two stages.

The cooling fan is also controlled by the ECU and has two speeds. Low at ~105 c and high at ~110deg c.

Tim..

I ve discovered the radiator is much cooler than the top hose.The hose feels rather empty so I am changing the thermostat tomorrow and replacing the top hose and jubilee clips as a precaution.

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