I agree with the bad rings, but usually a 4 cycle diesel wonb't run
away with blowing oil due to bad rings. now a 2 cycle (jimmy?)? thats
a different story,and yes, they will run away! But on your tractor,
you'll probably find hints of diesel fuel in your crank case as well.
Not always, but you might find that it's being traded out. Does the
engine have a lot of blow by as well?

Larry wrote:
wrote in news:a05416db-642e-457d-adc5-
:

This diesel is actually in a tractor but I'm sure there's no
difference. There is oil coming out of the exhaust. I was
guessing
that it could be a blown head gasket but not sure.


Worn rings from infrequent maintenance. The oil gets past the
oil ring and up into the cylinder head and is diluted by the fuel
spray that mixes with it that instant before combustion. The
compression is also down. Does it start easy or hard, an
indication of compression in diesels.

Wait until you see what happens when this is left unfixed! The
diesel may start to run on the oil leaking past the
rings...uncontrollably....right up to "terminal velocity"! Very
exciting. Use a metal plate over the intake to cut off its air
supply, which kills compression and PROBABLY will stop it.
A deck-mounted genset started running on lube oil on a
minesweeper I was on. We couldn't stop it. The black smoke
poured straight out the stack up a hundred feet! The captain
ordered us to push it off the stern. It was running very fast
when it hit the water. You could hear it exploding underwater.
Fire on an old wooden minesweeper was more of a worry....of
course.


Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

I did have it in the back of my mind that it would be the piston rings
but I thought that I would listen to a few comments first. Thanks
everybody! I didn't do a compression check and now the head is off,
but there didn't seem to be any loss of power when it was running.
Also, it shut down just fine and hasn't run away. I don't see any
signs of blow by in the intake or filter, but i do think that there is
a hint of diesel in the oil. There is a bit of black on top of the
cylinder heads. I think I'm going to replace the piston rings. I'll
post the results when finished.

wrote:
I did have it in the back of my mind that it would be the piston rings
but I thought that I would listen to a few comments first. Thanks
everybody! I didn't do a compression check and now the head is off,
but there didn't seem to be any loss of power when it was running.
Also, it shut down just fine and hasn't run away. I don't see any
signs of blow by in the intake or filter, but i do think that there is
a hint of diesel in the oil. There is a bit of black on top of the
cylinder heads. I think I'm going to replace the piston rings. I'll
post the results when finished.

Cool! while you have the head off you may as well take it to a shop
and have the valve guides inspected and new oil seals installed. old
valve seals get brittle and can leak oil down though the valves,
especially the intake.

At least that's what I'd do.

wrote in news:9061fc61-99f3-44ed-bdc5-
:

I think I'm going to replace the piston rings. I'll
post the results when finished.


The cylinders should be honed and the pistons replaced if you're
going to do that. The ring grooves in the pistons get wider as
time goes by and the cylinder walls need smoothing into a circle,
again. No need to put new rings on an oblong hole, right?

As long as you've taken it apart, pistons and honing are cheap.

Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
.....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

"Larry" wrote in message
...
wrote in news:9061fc61-99f3-44ed-bdc5-
:

I think I'm going to replace the piston rings. I'll
post the results when finished.


The cylinders should be honed and the pistons replaced if you're
going to do that. The ring grooves in the pistons get wider as
time goes by and the cylinder walls need smoothing into a circle,
again. No need to put new rings on an oblong hole, right?

As long as you've taken it apart, pistons and honing are cheap.

Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

Honing will not true a cylinder hole.

"Calif Bill" wrote in message
...

"Larry" wrote in message
...
wrote in news:9061fc61-99f3-44ed-bdc5-
:

I think I'm going to replace the piston rings. I'll
post the results when finished.


The cylinders should be honed and the pistons replaced if you're
going to do that. The ring grooves in the pistons get wider as
time goes by and the cylinder walls need smoothing into a circle,
again. No need to put new rings on an oblong hole, right?

As long as you've taken it apart, pistons and honing are cheap.

Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

Honing will not true a cylinder hole.


I don't think so either, but I am not a mechanic, that's for sure.
Isn't the cross hatch honing done to produce very microscopic grooves to
hold the lubricating oil?

Eisboch