I made a point of taking the Jupiter out today ( DRIVE IT DAY ). Did not see one classic or old vehicle actually being driven. Only a A40 Farina parked in Kirkcaldy. So took the car home and started to get it ready for its MOT. Only 1600 miles this year. Thought it felt like more. The major job recently was a) fitting the new rack and pinion and b) trying to sort out the torsion bar setting on the front O/S. This will be a full topic for JOWETT TALK.
Drummond
DRIVE IT DAY
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Drummond Black
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- Given Name: Drummond
- Location: Kirkliston, SCOTLAND
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The last few weeks has seen many classics on the road in Hertfordshire. The Jup has been out lots of times in an effort to cure what I thought was overheating.
Long story.... Two months ago, took the Jup up to Rugby and noticed the head temperature was 110C; header tank was its usual 75C. Stopped immediately and luckily was carrying the mechanical fan blades, so fitted them. Temp then was too cold, so took them off. Temp went up again, checked the rad level and it seemed as though the water was indeed boiling as it bubbled up, fitted the fan again..... Attention then turned to the recently fitted cabin heater. Thought that might be upsetting the circulation; so turned the tap off. Then back on again. No change.
Back home; then found the electric fan had become disconnected, probably when fittting the heater. However still no change with mech fan off.
One month ago: The thermosat had come out of its housing, perhaps it had blocked the flow. Perhaps the boiling had blown it out. Checked it opened at 75C. It did; put it back. More tests. Took thermostat out. Still no change.
Two weeks ago:Checked the calibration on the header tank with thermometer and the the head temp sensors with electric kettle in the road. Some adjustment with different resistors in series. Still no change on test run
Left it another week. Attention focussed on the head temp gauge. Much checking of earths and voltages and currents. Decided it was probably not well. So took the Jup for a long drive around the country lanes and did not look at the temp gauge. PERFECT. Yes and I did see lots of other classics on all these test runs.
Long story.... Two months ago, took the Jup up to Rugby and noticed the head temperature was 110C; header tank was its usual 75C. Stopped immediately and luckily was carrying the mechanical fan blades, so fitted them. Temp then was too cold, so took them off. Temp went up again, checked the rad level and it seemed as though the water was indeed boiling as it bubbled up, fitted the fan again..... Attention then turned to the recently fitted cabin heater. Thought that might be upsetting the circulation; so turned the tap off. Then back on again. No change.
Back home; then found the electric fan had become disconnected, probably when fittting the heater. However still no change with mech fan off.
One month ago: The thermosat had come out of its housing, perhaps it had blocked the flow. Perhaps the boiling had blown it out. Checked it opened at 75C. It did; put it back. More tests. Took thermostat out. Still no change.
Two weeks ago:Checked the calibration on the header tank with thermometer and the the head temp sensors with electric kettle in the road. Some adjustment with different resistors in series. Still no change on test run
Left it another week. Attention focussed on the head temp gauge. Much checking of earths and voltages and currents. Decided it was probably not well. So took the Jup for a long drive around the country lanes and did not look at the temp gauge. PERFECT. Yes and I did see lots of other classics on all these test runs.