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kaiser · 25th March 2009, 18:08

I would not go to the trouble of changing a functioning thermostat (and the associated pipes), unless you have to go in there in any case. Based on the age of your car, the belts could well be due for a change, in which case the thermostat and the water pump as well as the belt tensioner should be replaced, without hesitation!.
However the plastic will fail sooner or later, and you must just bear that in mind. As long as you keep a close eye on the water level, you usually get a small leak developing over time, and should get enough warning, if you are alert.

25th March 2009, 18:08	#3
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	I would not go to the trouble of changing a functioning thermostat (and the associated pipes), unless you have to go in there in any case. Based on the age of your car, the belts could well be due for a change, in which case the thermostat and the water pump as well as the belt tensioner should be replaced, without hesitation!. However the plastic will fail sooner or later, and you must just bear that in mind. As long as you keep a close eye on the water level, you usually get a small leak developing over time, and should get enough warning, if you are alert.