Stuck yanmar 165D

[millard762]

I tried that the other day and can try it again tomorrow. I had a bad angle and couldn't perceive any movement but can try that again

 

[careyo63]

Just beat The Hoye out of it! That works all the time. Metal hammer it what I'm talkin about!

 

[millard762]

I might even dump a can of coke in each cylinder

 

[bmaverick]

I might even dump a can of coke in each cylinder

Other than the head removed, have you split the tractor? I only say this since splitting the tractor would remove any doubt the transmission is preventing the engine from spinning.

You have only peeked into the bell housing where the clutch sits. It could be possible something there is truly sized up preventing the engine to freely turn.

 

[millard762]

I think it looks pretty darn good in there.

 

[LouNY]

That all looks very clean and good.
I have to wonder if there is something else locked up in that engine.
In or under the flywheel, maybe the wrong bolts used in a pressure plate or something in the front gears.

 

[millard762]

I will say that the fluid mixture in cylinders is hardly moving.....just little drips. So, for sure the rings are seized.

 

[bmaverick]

That all looks very clean and good.
I have to wonder if there is something else locked up in that engine.
In or under the flywheel, maybe the wrong bolts used in a pressure plate or something in the front gears.

You and I have the same hunch about something else not letting the engine to freely turn. Splitting the tractor is the only way to eliminate the question. And if this is the case, the repair can be way cheaper to fix overall.

 

[millard762]

That may be the case, which I hope it isn't. That will be outside of my ability

 

[ponytug]

That may be the case, which I hope it isn't. That will be outside of my ability

I would not be so pessimistic. It seems to me that you have already demonstrated quite a bit of competence. People here can help if it is necessary, at least with advice.

All the best,

Peter

 

[millard762]

Not saying I couldn't do it, I just don't have the resources for splitting it. If the loader wasn't in the way, I would consider it, but dealing with that has me not willing to do it. I have someone lined up if need be

 

[careyo63]

Don't blame you! That bottom end looks super nice from what I can see. Cylinders also from what I can tell. I had to send the Ford 2000 out! Sure did absolutely no way I was splitting it with a FEL. also. Lost the use of my Right Arm and hand. I have the equipment but I'm glad I sent it out! The man that did it knows his tractors! Ended up more than just the 2 stage clutch that had problems. He took care of pretty much everything. No doubt about it even with the extra cost I'm sure glad I went that way rather than doing it myself. Which I could have done but the shifter I couldn't of taken care so it was going to a shop anyways. Try to weld that just wasn't going to happen. I'm terrible at it! Type L. handed a lot so if or when you see Typo's now you know why. I really like the pics. Well worth repairing it. JMO....

 

[millard762]

I am kinda curious though, how fast (typically) should this fluid move past the rings? In an unstuck engine, how fast would the cylinders empty their contents?

 

[careyo63]

With nosigns of the rings being broken or a Broken Piston is a good thing. And the drip of oil on the Rod bearing is a good sign. No big Breaks or Gouges from the looks. The piston has Oil Rings and let a small amount of oil pass. Lubricates the Cyl. wall.

 

[etpm]

I think it looks pretty darn good in there. View attachment 877503View attachment 877504View attachment 877505

Is there any way you can pry gently on one of the crank eccentrics to see if it will rotate at all? Put the tractor in neutral first of course.
Eric

 

[careyo63]

Put that head back on and pressure up a Cyl.. Then with all that pressure plus trying to to pry on something should do it. If the cylinder is good it's going to hold pressure and a huge amount of force.If that doesn't loosen it up your pulling Rod caps and Main crank bearings until you do find it. My guess from the looks of the Pics it might not even be the pistons I don't see any signs of a problem to lock it down. Bad thing about not being at the tractor. I guarantee you I would know for sure in Few minutes or a couple hrs. at the most!

 

[millard762]

How would I pressure up the cylinder?

 

[California]

I'm not convinced splitting the tractor will help and it sure adds complexity. At most, maybe loosen a few bellhousing bolts at a time to see if one was jamming something.

In-frame additional investigation might solve the mystery - such as pulling the rod caps and pushing each piston up a little to confirm this is a stuck rings problem. Then if the crank won't rotate the slightest amount with the rods loose or detached, and you have checked inside the front cover, it's time for a specialist. The crank slides out the back of the block on most of these so I think working with that is getting into specialist territory.

 

[careyo63]

I am kinda curious though, how fast (typically) should this fluid move past the rings? In an unstuck engine, how fast would the cylinders

How would I pressure up the cylinder?

Air pressure. While you have the head off set up a way you can go through the Inj. Port. How it gets Fuel to the Cyl.. Diesel will hold a huge amount of Pressure. My Ford when I was bought the Pressure was 115 PSI gas. On a Yanmar Here is what you should be.
The cylinder pressure for all models of Yanmar is 390-470 p.s.i. (2700-3800 kPa)1. A good rule of thumb is 15 - 20 times compression ratio, which translates to 225-300 PSI for 15:1, 270-360 PSI for 18:1, and 330-440 PSI for 22:12. Gauge accuracy is critical, which is why cylinder variation should be considered2. The oil pressure gauge normally sits at 40, and at 2200 rpm's the gauge is dropping to about 25-303.
Gives you a good Idea. I don't see a big problem with the piston or Cylinders that I can see Pics. So if that Cylinder holds pressure It's most likely not the one locked down. If it drops Pressure Quick or won't hold any at all? Bingo there's your problem and I don't see it. Doesn't mean it's not true!

 

[millard762]

Took the starter back off and tried advancing flywheel....no go. Here is a look inside