1070 burning too much oil: John Deere Review  -- John Deere Tractors Discussion Forum and Review 1070 burning too much oil: John Deere Review -- John Deere Tractors Discussion Forum

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 06-16-2002, 22:26 Post: 39598
Charles Andrews
2002-06-16 22:26:58
Post: 39598
 1070 burning too much oil

Have a JD 1070 mfwd. Uses about 1 to 1 1/2 quarts per 50 hrs. Using Rotella 30 wt. Last oil change I added a quart of Rislone to get any bad stuff out. That was about 30 hours ago and have had to add a quart of oil already. I use this tractor mostly for bushhog work, mostly my old 5ft doing pretty rough stuff, but sometimes my MX6 for field work. Was wondering if anyone has rebuilt one of these motors and checking to see what their expenses were. Bore and hone, oversize pistons etc. versus deglazing and new rings/bearings. Any thoughts? Thanks, Charles






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 06-17-2002, 07:17 Post: 39606
TomG

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 1070 burning too much oil

I've done the in vehicle ridge-ream, pistons out the top, hone, clean, and new rings and bearing inserts trick on a gas engine that was a serious oil-burner. I also miced all parts to ensure that everything was still within spec.

I knew beforehand that the real oil burning culprit was the valve-guides. At least on gas engines the guides tend to wear before anything else, and the valve heads and seats are the next to go. My Ford engine used rubber boots around the valve stems for oil seals. Around 70,000 miles, the boots crack and there would be enough wear on the guides so oil gets sucked down the intake valve stems.

That sort of thing is common on gas engines, but less so on diesels since there's much less intake manifold vacuum. I figured that it didn't make much sense to tear down the engine without doing the head properly. So I had all the machining done and used new valves, guides and head bolts, which is a major expense in a rebuild. The cylinders, pistons and crank journals were well within spec, but I figured that I might as well put in new standard sized parts as long as the engine was tore down. If the parts were out of spec, then removing the block, a complete tear down and re-machining is required. Using oversized parts without proper machining doesn't work although there are some ‘cheapy' techniques.

All things considered, it's sort of a pain to do a partial rebuild and the results aren't that long lasting. If the tractor has adequate power and isn't making bad sounds, I'd probably keep adding oil, and maybe thicker oil. The reason I did the partial rebuild on the Ford is to pass an emissions test.






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 06-17-2002, 08:40 Post: 39610
Art White



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 1070 burning too much oil

You didn't give the hours of the tractor and that would tell us more as to what procedures might work the best. Maunfacturers have standards that say about a quart in 8 hours acceptable to them for warrantee purposes but that does also change depending on the size of the engine.






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 06-17-2002, 09:13 Post: 39615
DavidJ



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 1070 burning too much oil

I agree with Art, it would be more informative to know the hours on the unit. It would also be helpful to know if it's burning the oil or if it's a leak somewhere. A quart every 50 hours doesn't sound that excessive especially the way you describe using it. But that wasn't your question.

If you do a complete rebuild it'll probably cost you about $1500.00 - $2500.00 depending on what's done. If you do it yourself you should be able to save several hundred dollars on the rebuild.

If you can figure out where the oil's going you may find out that you don't need a complete rebuild.






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 06-17-2002, 21:15 Post: 39634
Charles Andrews
2002-06-17 00:00:00
Post: 39634
 1070 burning too much oil

Tractor has about 745 hours on it now. Notice blue smoke at low load and idle. When I am doing hard work, pto rpm exhaust is clear and sometimes black if I hit a load. Does that help? no leaks, I check it over pretty thorough. Thanks






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 06-18-2002, 05:35 Post: 39637
TomG

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 1070 burning too much oil

I'm assuming that blue oil smoke is what there is rather than gray smoke that would indicate a different problem.

I wonder if the smoke comes from the exhaust pipe, crankcase breather or both. Generally, you to burn more oil under heavy loads if the rings are bad and some of the smoke should be blow-by from the crankcase breather.

If it's burning oil at lower rpm's and light loads, it sounds more like my Ford valve guide problem. I've heard of diesel engines where an oil feed line to the rocker arm was disconnected, which put a lot of oil on top of the head. I've also heard of engines where an oil galley plug on the end of the rocker arm came out with the same results. I didn't hear if it was oil smoke or low oil-pressure that pointed to the problems, but probably both would be present. As noted, the oil consumption might be considered within a normal range. If it’s not, at 750-hours I would expect some sort of part failure rather than engine wear that would required re-building.

Occasionally you hear of stuck, or stacked rings that produce oil smoke and the problem clears after some use and possible with the assistance of an oil additive. However, blow-by usually would be present with this sort of problem.






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 07-15-2002, 23:59 Post: 40413
keoke 2
2002-07-15 00:00:00
Post: 40413
 1070 burning too much oil

Hi, I think the 1070 is a tubro engine. If that is correct, check the tubro bearing oil seals for leakage into exhaust stream.

cheers,
george






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 07-16-2002, 06:50 Post: 40415
Art White



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 1070 burning too much oil

I would suspect with the added info on the low hours for a 1070 that you should just look at deglazing the cylinder walls and could put it back together. I don't believe that you should need more than a deglazing unless like Tom said a part has failed. But there should be a tube coming down from the engine for crankcase ventilation. What are you getting out of there? That could be plugged and causing your problem. By manufacturers standards I don't think they would consider the engine out of spec's.






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 07-16-2002, 12:20 Post: 40422
Peters

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 1070 burning too much oil

Keoke maybe right if there is a turbo on the tractor. It is very easy for the bearing to wear in the turbo and provide excessive oil burn.
I had one turbo rebiult at new England Turbo and updated the turbo with water cooling jackets on the bearing. A place like New England Turbo would replace the bearing for ~ 100$.
Peters






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 07-17-2002, 06:43 Post: 40437
TomG

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 1070 burning too much oil

Yes, turbo seals would sure do it. Living in the compact tractor world, it's easy enough to forget that turbos exist. I don't know but I'm just accepting that a 1070 has a turbo. Assuming that keoke 2 is the same person as Keoke, his previous comments have been accurate.

I haven't been around turbos enough to know if a leaky seal would produce smoke only at low rpm's and loads and also with a lack of blow-by, but it seems like a good explanation. I also find it easier to accept the idea of a seal going bad at 750 hours than the other explanations I've come up with.

I've always heard that cooling down a diesel at slow idle after a hard run is good, but that a cool down is particularly important for turbo equipped diesels. I don't know if inadequate cool downs would contribute to seal failure.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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