Wolf159

Got the better half's xf back on the road about 4 days ago after a 3month rest due to lack of funds for rego, car was running fine, been driving around with no probs until today when suddenly she overheats, i mean really hot within 5mins of leaving the driveway she had coollant in her so i in hoping its not the head or the gasket. When you turn off the motor you can hear air banging in the cooling system. ive tried bleeding the system via the nipple in the thermo housing, I got steam. I've flushed her out. When i run her in the drive with the cap off and rev her and then let it idle i get water coming out of the radiator. There is no water in the oil or coming out of the exhaust... Any ideas

deankdx

i'm no expert with thermostats but one that is stuck closed would be my guess, mine was stuck open and running too cold causing rich mixtures and exessive fuel consumption

davway

try changing the thermostat to start with. add extra coolant thats undiluted. when it gets hot, turn the heater on and see if it goes down. if it does itll be your thermostat.

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MADXF

Yep, thermostat would be first port of call. A cheap way to eliminate one possible problem.

While you're at it, grab hold of the fan and see if there is any play in the shaft of the water pump. Mine had the slightest movement but it was enough to make it cavitate and not pump anything, my temp used to get real high all of a sudden, then suddenly drop again.

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Wolf159

Thnx guys.. yeah it was the thermostat