2305 engine needs to be rebuilt

   / 2305 engine needs to be rebuilt #1  

Henri88

Platinum Member
Joined
Nov 9, 2009
Messages
759
Location
Northern N.B.
Tractor
2008 JD 2305, 1000hrs
Well, my girl is apparently very sick. :( Brought it over to my dealer yesterday to replace the tranny fan on the warranty and I mentioned to them about a few issues I been having lately. One of the issues was when the tractor was sitting for a day or so, it would start only on one or two cylinders for a few second before idling normal. During those few seconds it would smoke like a normal diesel starting in cold weather. I thought it was either a glow plug or a bad injector leaking. No lost of power that I've notice and it would run fine after that. The other issue that bug me was I could here a small ticking noise from the engine once in a while but would only last approx. 1 minute and would go away. And last but not least, I notice a small increase in my oil consumption, about a quart between my last oil change. First year no consumption second year half a quart and this year a full quart. I average about 100 hrs between oil change. So the mechanic had a look at it and the first thing he notice was the fuel filter being black. I had change it 3 month prior. :confused: He decided that it was best to look at the injectors and the glow plugs first, and to are surprise when he remove the air intake cover, the inside of the intake was covered with oil which indicate some major blow-by possibly cause by defective rings. :( Regret not having the camera with me. They will have to open it up and will have a better idea of the real cause. It has 300 hrs on the engine and the warranty was past due 3 months ago, but the service manager said not to worry, he would take care of it. :thumbsup: I'm keeping my fingers cross. I would like to pick your brain and tell me if you would know any other reason for the presence of oil in the air intake, also has any one seen this problem before on that particular Yanmar engine. I am now waiting for a call from my dealer with more info. and have all kind of time to kill. By the way, I have been doing the maintenance by the book with JD filters and Castrol GTX Diesel 15w40.
 
   / 2305 engine needs to be rebuilt #2  
Usually don't hear much bad about the Yanmar engines. Sounds like a hair got crossways on yours, as you couldn't have done better with maintenance from what you say.
Good on the dealer to reassure you to not worry. Doesn't surprise me from Deere or their dealer. I suspect they are as surprised as you, and realize it has been happening for awhile and didn't just start from abuse.
But sorry to hear you are without for awhile. That is hard to take.
 
   / 2305 engine needs to be rebuilt #3  
Henri:

Sorry I can't offer any insight into the oil in the air intake, glad to hear your dealer is working with you.

Bad timing with the weather that's coming.

Let us know how it works out.
 
   / 2305 engine needs to be rebuilt #4  
Being a retired JD service manager I beg to differ that bad/worn/broken rings will let oil get into air cleaner. Defective rings lets compression out exhaust &/or crankcase vent tube. A leaking/burnt intake valve on the other hand could allow oil into air cleaner. It's possible the cyl head rocker arms were adjusted incorrectly from the factory or needed adjustment. If engine requires an overhaul at around 300 hrs I'd be looking at the air filtration system for leakage also.
 
   / 2305 engine needs to be rebuilt
  • Thread Starter
#5  
Being a retired JD service manager I beg to differ that bad/worn/broken rings will let oil get into air cleaner. Defective rings lets compression out exhaust &/or crankcase vent tube. A leaking/burnt intake valve on the other hand could allow oil into air cleaner. It's possible the cyl head rocker arms were adjusted incorrectly from the factory or needed adjustment. If engine requires an overhaul at around 300 hrs I'd be looking at the air filtration system for leakage also.

I could be wrong but the reason I have not question the mechanic on the possible bad rings was that I thought the crankcase vent tube was directed back into the air intake cover, which would explain the presence of oil if their was a major blow-by in the crankcase. Also keep in mind that only the air intake on top of the engine was saturated with oil, not the air filter. Jim, if you are familiar with this engine maybe you can confirm the vent tube in the air intake. Thanks! :)
 
   / 2305 engine needs to be rebuilt #6  
I do hope it turns out OK...sounds like the dealer is going to take care of you though!

As you know, most rings (both compression and wipers) are split (so they can be expanded to fit over the piston during installation).
It's important that those splits (maybe better referred to as gaps) do not line up. As an example, in an engine using 3 rings per cylinder, the gaps should be 120 degrees apart.
Although the engine I saw (not a diesel) that had the gaps too close blew a lot of smoke, this may not always be the case. BTW, in this case, it was the engine rebuilder who made the mistake during the rings installation.

So, maybe there was an mistake made during installation...even as good an engine as Yanmar builds can still have an occasional lemon.
 
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   / 2305 engine needs to be rebuilt
  • Thread Starter
#7  
Roy, you are absolutely right as for the gap of the rings being line up and I am positively sure that I have not done anything wrong to cause this problem. No over heating, cool down before shutting it off, clean and change air filter and front radiator screen regularly ect. The ticking noise is whats bugging me as it started at 100 hrs pretty much as the same time as my oil consumption. Broken ring maybe. :confused:
 
   / 2305 engine needs to be rebuilt #8  
Roy, you are absolutely right as for the gap of the rings being line up and I am positively sure that I have not done anything wrong to cause this problem. No over heating, cool down before shutting it off, clean and change air filter and front radiator screen regularly ect. The ticking noise is whats bugging me as it started at 100 hrs pretty much as the same time as my oil consumption. Broken ring maybe. :confused:

I doubt you did anything wrong...sounds like the dealer thinks that too.
 
   / 2305 engine needs to be rebuilt #9  
I thought the crankcase vent tube was directed back into the air intake cover, which would explain the presence of oil if their was a major blow-by in the crankcase. Also keep in mind that only the air intake on top of the engine was saturated with oil, not the air filter.

My thoughts also.
 
   / 2305 engine needs to be rebuilt #10  
Henri88
I was unaware that the crankcase breather hose was routed into air cleaner canister. After viewing the parts schematic that is correct so I will retract my previous statement. Thanks for correcting me.
 
 
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