My 79 Midget 1500 is overheating to the point where the temp went above 100c
I had a 85c stat fitted so I removed it and ran the car without a stat fitted. Temp dropped to around 60c
I then fitted a 76c stat and went for a run today. After about 1/2 mile the temperature rocketed to above 100c but the engine did not seem to be boiling. After a further mile the temp then dropped to about 80-90c At that point I got home and garaged the car.
Before all of this I bled the whole system, I'm sure there must be air locks in there somewhere but I'm dammed if I can clear them.
I disconnected the header tank and raised the pipe higher than the engine fill point then I added water. The heater is disconnected and bypassed, whether that has something to do with the problem I'm not sure.
There doesn't seem to be any leaks around the head!!
If I remove the expansion tank cap several hours after the engine has gone cold I can feel that the system is still under pressure.
All hoses have been changed for new ones and a new stat is fitted 76c and a new expansion tank cap.
Some time back I fitted a pressure tester to the expansion tank and raised the pressure to 15psi. It held steady.
This issue has plagued me for a long time now. I'm worried I may have done some damage so how can I check the block ?
Clearly I'm missing something.
Help me, where do I start.
Thanks
I had a 85c stat fitted so I removed it and ran the car without a stat fitted. Temp dropped to around 60c
I then fitted a 76c stat and went for a run today. After about 1/2 mile the temperature rocketed to above 100c but the engine did not seem to be boiling. After a further mile the temp then dropped to about 80-90c At that point I got home and garaged the car.
Before all of this I bled the whole system, I'm sure there must be air locks in there somewhere but I'm dammed if I can clear them.
I disconnected the header tank and raised the pipe higher than the engine fill point then I added water. The heater is disconnected and bypassed, whether that has something to do with the problem I'm not sure.
There doesn't seem to be any leaks around the head!!
If I remove the expansion tank cap several hours after the engine has gone cold I can feel that the system is still under pressure.
All hoses have been changed for new ones and a new stat is fitted 76c and a new expansion tank cap.
Some time back I fitted a pressure tester to the expansion tank and raised the pressure to 15psi. It held steady.
This issue has plagued me for a long time now. I'm worried I may have done some damage so how can I check the block ?
Clearly I'm missing something.
Help me, where do I start.
Thanks