Hi,
i got a 2002 1.8 tdci with 200k miles.
Some weeks ago my cabin heater did not blow warm air anymore.... so i sarted searching and found that all my water lines in the engine bay stay cold or only medium warm, Radiator is also always ice cold even after fast motorway drive or longer uphill.
Strangely the water themp never got over middle, but it reaches middle temp now much faster then before.
I got some pressure on the cooling system, but when i pull the small lines on the coolant tank while the engine is running, the pressure releases but then no more coolant flow.
So i think my water pump, should be still the first from 2002, is not pumping anymore. What is strange to me that the water temperature newer gets over middle, i am driving since 1000 miles like this. I can go do 10 minutes with 100mph+ and temp gouge stays middle.
I would thought that the engine should run hot, or do this engines run that cold?
I just want to be sure that its the water pump before i start ripping it all appart. If the water pump is really not working this 1.8 tdci engines are absolutely bulletproof.
Best regards