Rare fault.
Posted: Mon Dec 07, 2020 5:48 am
Some years ago I was on a 50 mile trip in my Minor when it started running roughly, and hunting up and down.
I looked under the bonnet at the usual suspects, but could see nothing wrong.
As I only had a few miles to go, I decided to try to get to my destination. The car ran very strangely to the destination, but did not cut out. When I got out and checked under the bonnet again, half of the coolant was gone, and I was concerned that I might have damaged the fairly newly fitted unleaded head.
What do you think the problem was?
I had recently fitted a new vacuum unit to the distributor. The part with the diaphragm in it was badly knurled on manufacture and pushed into the part with the screw thread and spring going through it. This part had pulled out, so the advance and retard was sometimes working, and sometimes not.
I superglued the diaphragm part back in and it gave no more trouble, until I replaced it recently. It lasted about 12 years.
Tip. Always carry super glue in your Minor.
And if you get a fault, stay calm and try to think outside the box. It was only by looking in detail at each component that I noticed the diaphragm unit sticking out a bit, and than wobbling it showed that it was loose.
I looked under the bonnet at the usual suspects, but could see nothing wrong.
As I only had a few miles to go, I decided to try to get to my destination. The car ran very strangely to the destination, but did not cut out. When I got out and checked under the bonnet again, half of the coolant was gone, and I was concerned that I might have damaged the fairly newly fitted unleaded head.
What do you think the problem was?
I had recently fitted a new vacuum unit to the distributor. The part with the diaphragm in it was badly knurled on manufacture and pushed into the part with the screw thread and spring going through it. This part had pulled out, so the advance and retard was sometimes working, and sometimes not.
I superglued the diaphragm part back in and it gave no more trouble, until I replaced it recently. It lasted about 12 years.
Tip. Always carry super glue in your Minor.
And if you get a fault, stay calm and try to think outside the box. It was only by looking in detail at each component that I noticed the diaphragm unit sticking out a bit, and than wobbling it showed that it was loose.