vw polo water leak

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Fri 30 Jan 2004 14:15
vw polo water leak - rustbucket
Hi all, have tracked down the water coolant leak that has been evident only by the small drop in the expansion tank on the k reg 1 litre polo.The leak is around one of the temp sensors fitted to the thermostat housing (the leak is such that when engine is hot any trace of coolant evaporates). Is the sensor just a push fit, held in by the 'C' type clip or is it threaded.
Is there some kind of seal or O ring to form a seal? I do not want to disturb the sensor until I know I can seal the leak with any parts needed to hand.

thanks for any advice.

rustbucket (the original)
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Fri 30 Jan 2004 15:28
vw polo water leak - Peter D
Yes C Clip and O ring. Leak sometimes caused by the moulding having a slither of plastic not trimmed off where the o ring sits. Remove clip, sensor and O ring clean and if you do not have a new O ring smear the old one in silicon Gasket sealer and reassemble. Top up the header with neat anifreeze and away you go. I would probably take this opportunity to empty, flush and refill with new clean antifreeze as per VW spec. Regards Peter
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Fri 30 Jan 2004 20:48
vw polo water leak - rustbucket
Thanks for the advice Peter.

rustbucket (the original)
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