Beside the hardenend valve stem seals there could be a stuck ring, or you could have a broken ring?
Run it a bit and then give it a comperssion test - or take the head off to check matters if you think you're going to increase damage to the bore
Here's one for the brains trust:
Just started the 2.25 diesel after three years lying fallow. It is running not-too-badly, and I am checking the timing to see if retarding it a little gets rid of a bit of an ignition knock. While inspecting various bits and pieces, I noticed that the exhaust flange joint had oil weeping out of it. I dropped the exhaust pipe, and sure enough the inside of the exhaust manifold has a fine coating of fresh oil.
This might be linked with the fact that a few weeks ago I vacuumed a small bit of metal out of number one pot via the injector port (long story; there's a thread in the IIA forum) and at the time drew a little oil into the pot past the valve seals. I made sure all was clear on all cylinders prior to start up by cranking with injectors and glow plugs not fitted, then with just injectors fitted and all the compression pushing out through the glow plug ports. I've checked the glow plugs since running, and they are dry as a bone - no oil apparent from inside the cylinders themselves.
I guess it could just be buggered valve stem seals. Or maybe it's related to my vacuuming efforts and it's residue in the head which will slowly disappear.
Thoughts, folks?
Thanks,
John
Beside the hardenend valve stem seals there could be a stuck ring, or you could have a broken ring?
Run it a bit and then give it a comperssion test - or take the head off to check matters if you think you're going to increase damage to the bore
My '76 2.25 diesel was doing exactly that, oil dripping out of the exhaust.
I made up a valve spring compresser, that cylinder needs to be tdc on firing stroke to hold the valve up.
It was only a couple of hours work to replace all the valve stem seals, completely cured the problem.
Mike
Thanks Mike - I have been thinking of doing exactly that. I did wonder if it might improve once it has run a little (hasn't even really been warmed up properly yet since its hibernation), so I will run it a little more, see how it goes and if things don't improve I'll be doing what you suggest.
Cheers,
John
John.
If you want to borrow the spring compressor send me an email on the address below.
I am in northern NSW
email: bushyx2atbigponddotcom
Mike
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