It will probably be the water pump
the plastic impeller on the back of the pump brake off stopping the water from circulating
very common fault on vw's, audi's and skodas
Hallo
without termostat, start the car. in one minute ideling, both hoses from cooller should be warm.
If only top one is warm, check if the hose from front wather cooller to expansion tank is
blocked (small one on top). usualy it is blocked on wather cooller
itself .if OK, change wather pump.
also check if presure is bildinh inside wather sistem. that indicate head gasket or head itself should be checked
If you had remove the termostat, there can be no air inside the engine
(if wather is inside).Even with termostat present, VW has no problem
with air pockets.If your temp.go pass half when car is standing still,
that is ok, but when driving must drop down.
Marko
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