JohnInSeattle
Member
- Joined
- Apr 18, 2018
- Location
- Seattle, WA
- TDI
- '04 Beetle, '04 Jetta Wagon, '05 Beetle and another '04 Jetta Wagon
My 2005 Jetta TDI BEW has never warmed up quickly but over the last few months it has been getting worse to the point it never gets over 120F at any time now.
I've read all the threads on this I can find and have already:
1) Replaced my timing belt and water pump, made no difference.
2) Replaced my thermostat twice with name brand ones, one before the water pump and one after, the second one seems to have made it worse.
3) Verified that the engine is actually not warming up by putting my hands on it after driving, there is nowhere that is too hot to touch except the exhaust and turbo.
4) Verified there is coolant flow in the reservoir at idle.
The upper radiator hose and tank is hot and the lower is cool, I assume this means that coolant is circulating and must in fact, be getting past the thermostat somehow, yes?
Outdoor temps around here range between 40F and 60F.
When I took out both thermostats I inspected them in place before removing them and they appeared to be completely closed, I tested the last one in hot water and it seems to only start to open about 180F.
I also inspected them looking for light leaking around the valve seal, they looked tight.
I have on order, yet another thermostat, Mahle seems to be the best brand I can find TX1587D 87C, and also a new temp sending unit because I can't think of anything else to do.
Any Ideas what else to check.
John.
I've read all the threads on this I can find and have already:
1) Replaced my timing belt and water pump, made no difference.
2) Replaced my thermostat twice with name brand ones, one before the water pump and one after, the second one seems to have made it worse.
3) Verified that the engine is actually not warming up by putting my hands on it after driving, there is nowhere that is too hot to touch except the exhaust and turbo.
4) Verified there is coolant flow in the reservoir at idle.
The upper radiator hose and tank is hot and the lower is cool, I assume this means that coolant is circulating and must in fact, be getting past the thermostat somehow, yes?
Outdoor temps around here range between 40F and 60F.
When I took out both thermostats I inspected them in place before removing them and they appeared to be completely closed, I tested the last one in hot water and it seems to only start to open about 180F.
I also inspected them looking for light leaking around the valve seal, they looked tight.
I have on order, yet another thermostat, Mahle seems to be the best brand I can find TX1587D 87C, and also a new temp sending unit because I can't think of anything else to do.
Any Ideas what else to check.
John.