thebiglad
Well-Known Member
Hi all, I'm having a cooling problem with my wife's '96 Def 110 TDi 300. She overheats, according to the gauge dramatically after a short drive.
Symptoms:
1. Coolant temp gauge shows overheat very quickly after a short drive;
2. Header tank coolant stays cold, but rubber hoses are hot from the 'stat housing to the rad;
3. Rad is warm at the top but cool at the bottom;
4. No smoke or steam from the exhaust or anywhere else;
5. No apparent loss of power;
6. No loss of coolant;
7. No pressurisation of the header tank;
8. Squealing noises coming from the new water pump, unless I remove the header tank cap and the 'stat housing cap, then they stop. It's as if there is insufficient coolant going through the pump until these caps are removed?????
Up to now I have:
1. Flushed the rad, the heater rad and the block;
2. Replaced the water pump;
3. Replaced the 'stat;
4. Replaced all hoses and clips;
5. Refilled with new coolant ensuring that the rad, the stat housing and the header tank levels are all good.
It feels like an air lock to me, but I'm out of ideas to fix it. Anyone got any inspiration?
Symptoms:
1. Coolant temp gauge shows overheat very quickly after a short drive;
2. Header tank coolant stays cold, but rubber hoses are hot from the 'stat housing to the rad;
3. Rad is warm at the top but cool at the bottom;
4. No smoke or steam from the exhaust or anywhere else;
5. No apparent loss of power;
6. No loss of coolant;
7. No pressurisation of the header tank;
8. Squealing noises coming from the new water pump, unless I remove the header tank cap and the 'stat housing cap, then they stop. It's as if there is insufficient coolant going through the pump until these caps are removed?????
Up to now I have:
1. Flushed the rad, the heater rad and the block;
2. Replaced the water pump;
3. Replaced the 'stat;
4. Replaced all hoses and clips;
5. Refilled with new coolant ensuring that the rad, the stat housing and the header tank levels are all good.
It feels like an air lock to me, but I'm out of ideas to fix it. Anyone got any inspiration?