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that seems like a good fix for the smoke but for that to happen on the stock position does that not seem that the valve cover is holding to much oil? just guessing did you notice how many or where the oil passages into the block were located maybe there restricted or plugged I would think there should be one on either end so oil would not collect angina just guessing
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David,
It is not intuitive to me that the oil would build up to a level that would cause this issue either. My engine is “immaculate” on the inside as I just completed an in frame refurb only 30 hours ago so it is not an issue caused by sludge etc. It has no noticeable blow-by with the new sleeves pistons and rings.
It had the problem before the refurb as well so it is unrelated to me having the engine apart. My place is very hilly and I may possibly operate my tractor under unusual conditions. It take a while for the symptom to appear when you get it into the situation that will cause the smoking, it recovers very quickly as you get near level.
I did not examine the oil return system in detail but the push rods are on the right side of the cylinder head so that probably explains why it is aggravated by being biased to the left. What is probably happening is that the oil builds up in the front corner if the valve cover and the valve spring splashes the oil enough that a significant quantity makes it into the breather hose.
It would be interesting to see if it is only the TY395E engine that has this breather design. I have no idea how many tractors were built with this engine.
Have a great day,
Jim
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My TY395E3 engine had the same symptoms and I did the same mod to correct it. It should be noted that most engines will lose oil pump suction at about a 20° incline unless fitted with a deep pocket sump or a “marine” sump. Keep an eye on your oil pressure gauge when negotiating those steep slopes.
Nice machine work.
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Bob,
Good to hear that my problem is not unique.
Your advice on monitoring oil pressure is good.
I kept a close eye on the oil pressure when I was evaluating the fix and all was well, I should probably add an audible warning for low oil pressure and high engine temp. When I am operating the machine under extreme conditions my attention may be on things other than the gauges.
Jim B
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Again, I had the same concerns. When operating the backhoe my back was turned to the instrument panel, and the engine in general. I was working the unit late one night when the thermostat gasket blew. I didn't know it until I smelled a really hot engine and was able to shut it down before it seized. Consequently, I installed oil pressure and coolant temperature Murphy Switchgages® and connected them to a piezoelectric horn and a small lashing LED beacon. Also installed a fuel pressure Switchgage because of past issues with diesel bugs.
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My dozer has a worse problem when operating on declines. It starts running on engine oil. Shut off the diesel yet the revs keep climbing then it becomes a race to the nearest flat area before the engine can self-destruct. Scary stuff believe me. It hasn't always done this. I took it down a prolonged steep grade while it was still new and all it did was change tone and spout smoke as others on this thread have described.
The first engine overrun occurred at about 180 hours. I made a mod (pictured) to the valve cover where the breather tube enters but this failed to solve the problem. After that I blocked the tube entirely which delivered no improvement. Thought about the possibility of oil leaking past the valve stems on #1 cylinder but not sure if that alone would be enough to cause a runaway engine. Thoughts anyone?
Dozer YCT306S shuttle shift - root rake, tree-pusher, backhoe
Excavator Hyundai 17 tonQLD, Australia
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