yanmar ym 2000 won't start

[garyd]

Well here's the latest I've called a few of the local diesel shops to see if they can check the injectors no luck yet seems they send injectors to salt lake city. There should be a shop local that can check them I'll try the Deere dealer monday or tuesday. I feel kind of stupid as part of the problem has been taken care of by adjusting the valves. THANKS SAHTOBULL!! Sorry I need to read the posts fully. Since I could not find a shop over the weekend to check the injectors, I replaced them in the head. Pulled the valve cover and checked the valve lash it was open on all valves closed them down to .008". The fuel could have been suspect so drained the tank and replaced fuel. After adjusting the valves changing the fuel bleeding the fuel system the tractor will start but only idles with still lots of white gray smoke. smoke burns your eyes smells like diesel. while the tractor is running I cracked open the banjo fitting on the injectors on one it seemed to quite it down some on the other it killed the tractor. what do you guys think bad injector low compression, both? How do youu check compression? push in gauge in the injector port? AS all ways thank you guys for the suggestions I know its hard to dignose when you can't see, hear or smell.
Gary<><

 

[mark777]

............ smoke burns your eyes smells like diesel. while the tractor is running I cracked open the banjo fitting on the injectors on one it seemed to quite it down some on the other it killed the tractor.......
Gary<><

I think you've discovered the problem. The injector that killed the engine is the GOOD one...

Mark

 

[1danny]

Well here's the latest I've called a few of the local diesel shops to see if they can check the injectors no luck yet seems they send injectors to salt lake city. There should be a shop local that can check them I'll try the Deere dealer monday or tuesday. I feel kind of stupid as part of the problem has been taken care of by adjusting the valves. THANKS SAHTOBULL!! Sorry I need to read the posts fully. Since I could not find a shop over the weekend to check the injectors, I replaced them in the head. Pulled the valve cover and checked the valve lash it was open on all valves closed them down to .008". The fuel could have been suspect so drained the tank and replaced fuel. After adjusting the valves changing the fuel bleeding the fuel system the tractor will start but only idles with still lots of white gray smoke. smoke burns your eyes smells like diesel. while the tractor is running I cracked open the banjo fitting on the injectors on one it seemed to quite it down some on the other it killed the tractor. what do you guys think bad injector low compression, both? How do youu check compression? push in gauge in the injector port? AS all ways thank you guys for the suggestions I know its hard to dignose when you can't see, hear or smell.
Gary<><

Like Mark said, sounds like you have a bad injecyor nozzle, the valves set on .006.

Danny

 

[SATOHBULL]

If you haven't found a place to test them, you can always swap the two injector nozzles the run the test you did. Loosen each nut until fuel sprays and see if the miss followed the injector. If it did, I would just buy replacements. If not, then the nozzle is not the problem.

 

[Eddie]

If you haven't found a place to test them, you can always swap the two injector nozzles the run the test you did. Loosen each nut until fuel sprays and see if the miss followed the injector. If it did, I would just buy replacements. If not, then the nozzle is not the problem.

Good trouble shooting proceedure.

 

[garyd]

Update, well got in from the shop. I changed the injectors around body and all not just nozzles. The problem did not follow the injector but remained in the front cyclinder. What eles should I try before I remove the head? Thanks Gary<><

 

[spyder2]

I am sorry to have to say this Gary but I think you may have a broken ring on the offending cylinder. First do a compression test before you pull the head. I am afraid that it looks like you may have some work ahead of you. I do not know diesel engines as well as gasoline engines but I think that something caused low compression on that cylinder. It could be wear but then the two cylinders should have roughly the same compression reading. It could be a damaged valve or valve seat also. I hope it is the latter because then you do not need to open the whole engine. Good Luck

Marnus

 

[normde2001]

If I recall correctly, you still don't know if the injector pump is putting out correct pressure. Removing the head will not show a bad ring, so if you remove it and don't find any valve problem, your only recourse will be to remove the oil pan and knock the pistons out, (complete overhaul); thus the reason for troubleshooting everything possible before tearing into the engine.

 

[garyd]

Good Morning TBN
Yes Norm you are correct I dont know what the compression of the cyclinders are or if the injector pump is giving proper pressure to the injectors. How should I check fuel pressure and engine compression? The local autozone has many tools for lending, maybe they have the proper gauges. Thanks Norm
Gary<><

 

[Tom_Veatch]

"How should I check fuel pressure and engine compression?"

Last compression testing I did was on a 1967 Chevy 327 that had a 10.5 to 1 compression ratio. That Camaro was one fun auto - but that's another story. I'm sure it's a whole 'nother world with diesels, but I saw this in the HF flyer that came yesterday (It's gotta be a good one!):

El-Cheapo Diesel Compression Tester