AD with dooc mtr.

[Crux]

Got mtr. running but poorly. found a rag sucked into the head from air intake. After getting mtr started with the help of alot of starting fluid, I discovered excessive crankcase pressure. This was evedent by oil being forced  from front crank seal and oil filler cap on side of the engine. My thought is stuck rings. Any other ideas. I haven't done a compression test on the mtr yet. I don't have a testor for injector hole. Does this take a special adaptor to hold in place? Thank You, Crux.

[RAB]

Could be. these tractors are all old and you haven't told us much about it.  Could also be a blocked breather - probably another rag stuffed tight in it or just clogged up.
RAB

[Crux]

I don't believe there is any more rags in the head. I checked it out real good. The Engine was stuck but was able to free up with alittle effort and patience.The engine never ran on all cyclinders that I can recall. I attributed the dead hole to a fuel problem. There is way to much pressure being developed in crankcase. You can feel it at the oil filler cap. Any other possibilities besides stuck rings? Any tricks to free them up if they are stuck? Thank you, Crux.

[Blake Malkamaki]

If the engine was frozen, you probably have some valves that are stuck open.

Blake

[Crux]

I've never experienced stuck valves creating excessive crankcase prssure, just no compression. Please explain. I'll pull the valve cover and take a look. The stuck valves would certainly explain the hard to start issue.Tannks for your support, Crux

[Blake Malkamaki]

I've never experienced stuck valves creating excessive crankcase prssure, just no compression. Please explain. I'll pull the valve cover and take a look. The stuck valves would certainly explain the hard to start issue.Tannks for your support, Crux

The stuck valves would not create crankcase pressure, but would cause hard starting and cause it miss on some cylinders. The crankcase pressure could be from stuck rings or broken pistons. You'll probably have to pull the head to find out what's wrong.

You said the engine was frozen. How bad? And what did you do to free it?

The cylinders may be all glazed from rust, causing extreme blowby too.

Blake

[Crux]

I think stuck valves will be found on this mtr. The way the exhaust stack cover bounces while running might be another indication of a cyclinder not firing or lack of compression. Knowing the engine ran less than 2 years before I put a wrench on the crankshaft with a mild helper bar. By working gently both directions it freed up to where the starter could take over. I should have checked the valves then. If I pull the head will the gasket be reusable? Whats a good way to check injectors? Can I pull one and hook it again to see if it sprays ? Is this a speciality issue? Thank you,Crux.

[RAB]

Crux, I didn't mention the head.  I was refering to the engine breather.  If someone had blocked off the induction side of the head, while in store to keep out moisture and/or livestock, they could also have sealed off the engine breather in the same way?  Oil leaking like you describe is eiter: (1) seals shot;  (2) oil level much too high; (3) excessive crankcase pressure due to (a)excessive blow-by or (b) blocked breather.  Excessive blow-by is favourite but you did ask for any other ideas.
RAB

[John Schwiebert]

Crux: You are making hard work of this. First thing I would do it drop the exhaust manifold and then start the engines. Put you ear plugs in and see which ports emit the white smoke. Those are your problem cylinders. Then while it is running get  can a of starting fluid and spray it in a very light mist through the air cleaner. See if the smoke goes away from any of the cylinders. If it does those cylinders are low on compression. Yes your nozzle test idea will work. Oh maybe before you start make sure that governor if it has a Timken unit has oil in it. Any more  questions? John

[Crux]

John,I like that identification method and look forward to using it. After finding the problem cyc. I'll check for stuck valves and if ok figure on pulling the head to inspect the piston as siggested by Blake, right? I don't know how else crankcase pressure would build but by a ring or piston problem. Thanks for sharing your knowledge and support, Crux.

[Bob]

I had trouble with my AD at first. I finally pulled the head to find all the valves were shot. Fixed that put it together still the same. Pulled the engine down only to find 1&2 pistons broke and rings, #3 rings stick, #4 ristpin keeper out of place and scored cylinder wall because of it. Even if I did get it to run it would have ruined it even more. I found pistons, rings, sleeves and put it together and it runs like a swiss watch.

What I'm trying to say here is sometimes you are better off just tearing it all down and finding the problem. Bad rings are my guess.

Best of luck,
Bob