oliver88 gas to diesel

hrRoss · Oct 21, 2016

hauling wagons today with 2 88s, one gas(old style) one diesel(99 motor) having carb troubles with gasser, started thinking about converting to diesel. change head, front cover and pump rest of fuel system, should be a done deal as have most of the stuff, right, or am i missing something?

oliver90owner · Oct 22, 2016

Hardened crank?

Different grade crank bearings?

Clutch diameter (torque rating)?

Starter motor?

Cams the same lift and timing?

Don't forget swapping spark plugs for injectors! (Probably not missed, but included to make the list a bit longer)

Tramway Guy · Oct 22, 2016

You'd be better off buying an 88-880 diesel with everything already on it. Including the fuel tank. I thInk the battery compartment might be different also; but that could be overcome.

Kirk Norlin · Oct 22, 2016

I am pretty sure that with the bigger diesel starter, a diferent flywheel is used. Seems like I ran into that a few years ago. Also there should be a soft plug/blockoff to plug the distributor hole.

brutus49DC · Oct 22, 2016

I think it would be a lot easier to just clean/fix the carb. If you want another dsl. there should be some around to buy. Personally I always thought the 77/88 diesels were dogs compared to the gas models but the diesels were very easy on fuel.

J. Schwiebert · Oct 22, 2016

Oliver 90 owner mentioned the larger more important items, but small items like air cleaner, bell housing, flywheel, head bolts ( there are more of them) etc that have not been mentioned yet. Also if this is a K100 A or B block the valve lifters are also different!

MIKE FRENCH · Oct 22, 2016

heck just sell me that gas old style and go buy another diesel. I would be interested though.

T-bird · Oct 23, 2016

Diesel cranks have exact same part number as gas cranks. I and T manual botched that one up by saying diesel engines come with tocco hardened cranks, so now the word on the street with everyone is the cranks are different. Think about it, tocco hardening is very easy and why would they go through the expense of handling some cranks and not the other. Cranks are the same and as far as that goes, Motor oil today is far superior compared to oils in the 50s anyway so the lubricating properties are excellent. I converted my 770 and my gas tank is larger than the diesel tank,,,,with no return port. I drained the tank, left it open for over a year and then drilled out the top side. After I drilled it I put a 1/4 inch npt pipe coupling and welded it in so I can return unused fuel.

J. Schwiebert · Oct 23, 2016

Wait a minute! When new the gas and diesel engines did have different crankshafts. That is why on a diesel crank the forging number has one stamped number. To make things easier only the diesel crank was furnished for repairs. Late in the production of the super's since a high percent of the tractors were diesel the gas cranks were dropped. Also the early fleetline tractors rods had shims for bearing adjustment. They found out real quick that did not work in a diesel engine. In the 60's Oliver miss boxed some bearings where they had gas bearings in a box with diesel bearing part numbers. We had a customer that got a set and they hammered out in less than a week!

hrRoss · Oct 23, 2016

more head bolts is something i didnt think of, eaverything else would be doable

ejr-IA · Oct 24, 2016

Up front on timeing gears and idlers will have to change a bushing to let oil get to the one gear.

WGM · Nov 1, 2016

I've found I and T manuals provide enough information to get a guy in trouble.

oliver88 gas to diesel

hrRoss

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oliver90owner

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Tramway Guy

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Kirk Norlin

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brutus49DC

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J. Schwiebert

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MIKE FRENCH

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T-bird

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J. Schwiebert

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hrRoss

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ejr-IA

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WGM

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