My exhaust push rod tube has leaked a little oil for some years and because I have had to have a repair done to the head, I have naturally changed the bottom seals for the push rods in the expectation of curing the slight leak when I replaced the cylinder head.
I checked the push rod tube for circularity, correct diameter and damage before I replaced it and it was a tight fit in the seal.
It still leaks a little and now I have no idea why.
Presumably to do a proper fix, I will have to remove the head again - though I seem to remember an owner saying that he had managed to cut a new seal and then fit it round the tube with some sealant. I do not think however that I could get the seal into the crankcase on my bike - it is too tight a fit onto the pushrod tube.
For the moment I have put some special silicone type seal round the tube seal and then a thin layer of Araldite and this seems to have worked.
This must be an old problem - and I know for a fact that some old aluminium push rod tubes as originally fitted to my bike (I have had it since 1956) were 25thou undersized in diameter which leaked for years until I fitted stainless ones.
Has anyone got a good fix without taking the head off again or any ideas please on what the problem might be or special instructions on how the seal should be fitted ?
Matty
I checked the push rod tube for circularity, correct diameter and damage before I replaced it and it was a tight fit in the seal.
It still leaks a little and now I have no idea why.
Presumably to do a proper fix, I will have to remove the head again - though I seem to remember an owner saying that he had managed to cut a new seal and then fit it round the tube with some sealant. I do not think however that I could get the seal into the crankcase on my bike - it is too tight a fit onto the pushrod tube.
For the moment I have put some special silicone type seal round the tube seal and then a thin layer of Araldite and this seems to have worked.
This must be an old problem - and I know for a fact that some old aluminium push rod tubes as originally fitted to my bike (I have had it since 1956) were 25thou undersized in diameter which leaked for years until I fitted stainless ones.
Has anyone got a good fix without taking the head off again or any ideas please on what the problem might be or special instructions on how the seal should be fitted ?
Matty