30-07-2024, 04:49 PM
Well. I'm mystified!
I checked over all the various pivot points in the advance mechanism and although they are a little worn nothing seems seized.
I put it all back together and set the engine up using a feeler gauge so that the points just started to open at TDC and the engine started and ran quite smoothly at tick over. On the road it seemed to run OK until I came to even a slight (by Devon standards) incline when I had to change down. Once the revs were up again it was OK but definitely didn't really have much pull at low revs.
I then tried using some timing marks on the camshaft pully and a rather old timing light which works OK but is a bit of a hassle to use as it needs a 12 volt supply to function.
The timing wasn't exactly on TDC but not that far adrift but when I increase the revs there doesn't seem to be any significant increase in the advance. To be honest it's not very easy to see what's happening and the timing does seem to be varying slightly even at a constant running speed presumably due to the wear in the distributor.
I'm sure the advance mechanism isn't seized so either the DKY style cam and toggles are the issue or the springs are too strong, neither of which really seems to be that obvious.
I'm beginning to think I'm just going to have to put up with it until I can afford either a better DK4A unit or even a new electronic one.
John.
I checked over all the various pivot points in the advance mechanism and although they are a little worn nothing seems seized.
I put it all back together and set the engine up using a feeler gauge so that the points just started to open at TDC and the engine started and ran quite smoothly at tick over. On the road it seemed to run OK until I came to even a slight (by Devon standards) incline when I had to change down. Once the revs were up again it was OK but definitely didn't really have much pull at low revs.
I then tried using some timing marks on the camshaft pully and a rather old timing light which works OK but is a bit of a hassle to use as it needs a 12 volt supply to function.
The timing wasn't exactly on TDC but not that far adrift but when I increase the revs there doesn't seem to be any significant increase in the advance. To be honest it's not very easy to see what's happening and the timing does seem to be varying slightly even at a constant running speed presumably due to the wear in the distributor.
I'm sure the advance mechanism isn't seized so either the DKY style cam and toggles are the issue or the springs are too strong, neither of which really seems to be that obvious.
I'm beginning to think I'm just going to have to put up with it until I can afford either a better DK4A unit or even a new electronic one.
John.