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I have a p reg corsa turbo diesel and the temp gauge runs high especially when idelling. normal running it drifts slightly need advice if this is fan switch, or temp sensor switches or something else. had new pump fitted, head gasket done and dnot wont any more damage to engine. please advise. has isuzu engine in it Errol

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Hi errol,try loosening the highest hot hose clip,to vent any trapped air,(make sure the plastic bottle is full).
to test the fans, run a wire from the battery to the fan and if fans run then it could be the sensor or the relay.....relay cheapest.

Posted on Jul 30, 2010

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