Rolled my Yanmar EX3200 and have questions

TDR · Aug 17, 2011

Hi guys, Thanks for contributing. I agree with the minimal risk of mechanical damage being the cause of the poor performance and smoking. I still prefer to believe the relocation of fluids is impacting the operation. However the continuation of the smoke after all of these nights of running gives me worries. It does not appear to be burning away like one would hope. The smoking has almost completely disappeared at idle but at mid throttle it has stayed mostly the same as the first night....very heavy and rich smelling of diesel. It is almost like it is running WAY to rich rather than oil in the cylinders.
Any thoughts on too much fuel rather than oil causing the rich smoke?
What controls the amount of fuel?

I had cracked the injectors earlier which did produce fuel from each line as well as a noticable reduction in RPM from each individual cylinder. Although I had removed the entire air cleaner tube, filters and assembly I did not get into the actual intake itself. I will do so tomorrow night and post the results.

cowski · Aug 18, 2011

how much time do you have on the engine after you rolled it?i would run it a lot before i took anything else off the engine.i would do one thing that is blow the fuel line out back toward the tank.when you rolled it anything like dirt or water was washed off the bottom of the tank and could of been sucked into the fuel line when it was cranked.this can cause the blue smoke problem.

TTTTTT · Aug 18, 2011

Did the same a few years ago. No colatteral damage. No issues for 2 years now. Can't believe in all the panick you didn't get pics and high quality video

These thread detail the fun

'The Big Flip"
http://www.tractorbynet.com/forums/safety/145119-big-flip.html

Starting After 'The Big Flip
http://www.tractorbynet.com/forums/chinese-tractors/145120-df354-starting-after-big-flip.html

Great you got it going without too many issues:thumbsup:

Dave

5030 · Aug 20, 2011

TDR said:
Hi guys, Thanks for contributing. I agree with the minimal risk of mechanical damage being the cause of the poor performance and smoking. I still prefer to believe the relocation of fluids is impacting the operation. However the continuation of the smoke after all of these nights of running gives me worries. It does not appear to be burning away like one would hope. The smoking has almost completely disappeared at idle but at mid throttle it has stayed mostly the same as the first night....very heavy and rich smelling of diesel. It is almost like it is running WAY to rich rather than oil in the cylinders.
Any thoughts on too much fuel rather than oil causing the rich smoke?
What controls the amount of fuel?
I had cracked the injectors earlier which did produce fuel from each line as well as a noticable reduction in RPM from each individual cylinder. Although I had removed the entire air cleaner tube, filters and assembly I did not get into the actual intake itself. I will do so tomorrow night and post the results.

The injection pump and only the injection pump, however, any restriction in the intake of air will cause smoking as well.

Johndeere3720 · Aug 20, 2011

Originally I would think that you had oil seep up into the combustion chamber but now i think that the timing could be off on your injection pump. That or you have a bent valve which is possible.

TDR · Aug 21, 2011

Hi guys, finally had a chance to get back to look at the tractor. I have pulled both the air cleaner assembly and the entire muffler/pipe assembly. It is now pure air in and open exhaust out. When I run the motor it "pulses" the smoke out as if it is one cylinder is the culprit. I do not see where there could be any air intake restrictions. So it must be down to the two final possibilities of too much fuel to a cylinder or that cylinder has a compression problem? Johndeere3720...how do I check the injection pump timing? Also, All of my compression gauges are for gas engines... Is there another way to check compression or do i need to buy a new gauge? What should the gauge read up to?

Short Game · Aug 21, 2011

The pulsing makes me think of the governor. It would probably smoke if it were repeatedly getting spiked with fuel and then alternately starved.

Don87 · Aug 21, 2011

TDR said:
Hi guys, finally had a chance to get back to look at the tractor. I have pulled both the air cleaner assembly and the entire muffler/pipe assembly. It is now pure air in and open exhaust out. When I run the motor it "pulses" the smoke out as if it is one cylinder is the culprit. I do not see where there could be any air intake restrictions. So it must be down to the two final possibilities of too much fuel to a cylinder or that cylinder has a compression problem? Johndeere3720...how do I check the injection pump timing? Also, All of my compression gauges are for gas engines... Is there another way to check compression or do i need to buy a new gauge? What should the gauge read up to?

The pump timing did not change when the tractor tipped.

You need a compression gauge made for diesel engines to check compression. A gauge that reads to 1,000 is needed.

But I would advise against starting that tractor again, because your bent valve is going to snap off and take the piston out also, along with snapping the tip off the injector.

banjodunn · Aug 22, 2011

G'day as posted your inj pump timing CANNOT change due to the rollover:thumbsup: However you may have an issue with compression or valve.
1. Lift the rocker cover and check all the valve clearances an exceesive clearance can mean a bent valve OR it may just mean it was never adjusted properly from new

2. If the clearances are not in spec then adjust

3. If the clearances are within spec then compression test as said earlier you need a proper tester for diesels and i would expect to see around the 350 to 450 psi mark (sorry don but 1000 a bit hi starter would never turn it over

). You want to see no more than a 10 % variance between the cylinders, if you only have 60 hrs on the engine then i would not bother doing a wet and dry test as yous rings should be sealing good at this stage, just do a dry test

Try this and report back

Jon

Don87 · Aug 22, 2011

banjodunn said:
G'day as posted your inj pump timing CANNOT change due to the rollover:thumbsup: However you may have an issue with compression or valve.
1. Lift the rocker cover and check all the valve clearances an exceesive clearance can mean a bent valve OR it may just mean it was never adjusted properly from new

2. If the clearances are not in spec then adjust

3. If the clearances are within spec then compression test as said earlier you need a proper tester for diesels and i would expect to see around the 350 to 450 psi mark (sorry don but 1000 a bit hi starter would never turn it over). You want to see no more than a 10 % variance between the cylinders, if you only have 60 hrs on the engine then i would not bother doing a wet and dry test as yous rings should be sealing good at this stage, just do a dry test Try this and report back

Jon