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IH DT466 engine faults

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Hayman

04-02-2005 10:52:22

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Been looking at a lot of IH single axel trucks with the DT466 in it. Now everyone I talk to pretty much likes the engines and comments on them being very economical to rebuild etc.

Heard more that once on the back 5&6 cly. the bottom "O" rings like to let go.

Now is this a weak spot or just the normal type of "O" ring failure that can happen on liners in diesel engines?? That typically don't have their antifreeze changed regularly or are maintained like they should???

Anything esle on these engines one should be aware of?

thanks

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Don Montgomery

04-03-2005 18:03:31

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

The 300-400 series engines are now far along enough in the evolution that they have most of the problems worked out. The oil pump is and has always been a geroter style, located on the front of the crankshaft. The injecton pump started out as an American Bosch style and wasn't very reliable. They are still a weak sister in the earlier engines, although now more reliable as a result of many changes. The earliest engines, in the 70's started out with rod problems because of the angle that the rod cap was designed to split. I personally researched the failed engines and as a result of the work, the cap angle was changed. There were many changes to the DT466 in crawler tractors which was the toughest application. They now are good engines and most versions with the Robert Bosch injecton pump are good. The 530 is a outgrowth of the DT466 and I hear is a good engine, but will have to be proven.

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Davis In SC

04-02-2005 19:18:49

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

Any truth to the rumor that DT466 is really built by Perkins ?????

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cadet trooper

04-02-2005 18:02:06

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

Hayman, the only thing I can say is that o-rings can be an issue for any thing. The problem is with all the technology that this country has accomplished we cannot foresee all the chemical changes that take place when you add your own water to anti freeze along with heat and metal reactence. When you add an unknown such as water from a well which is probably better than city water which has chlorine if mixed with an acetic acid can make a mild HCL (hydrochloric acid) that can eat up just about anything known to man.This discuussion can go on for days.A water conditioner on your cooling system might be a good idea. My two cents.

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thejdman01

04-02-2005 16:12:01

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

I dont know what yoaur using it for i know you said single axle but alot of miles round town etc. are you driving it or not. i have driven many dt466's some in single axles like for the township i plow for in the winter some in tadem dump trucks. in the single axle thats geared super low for plowing it does ok for its purpose. its for subdivisons and plowing snow you arent trying to get a load up to any considerable speed so for that its ok. I personally say and think it has a lot to be desired in a tadems and in a single axle that you are trying to maintain any speed with they just dont have any power. also its what your acustomed to. way better then a 318 detroit but way less then a 855 cummins. if your used to 318 detroits a 466 will be a powerhouse caddy if your used to 855 cummins youll be very disappointed

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J. Schwiebert

04-02-2005 12:46:11

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

They are good engines. Remember the first DT-466 (A) series are different from the latest DT 466. There were many different versions of the DT-466 in fact they do not all even have the same bore & stroke or if you are talking electronic DT-466E engines the older ones have the Cat HEUI fuel system while the new ones hava 24 valve head and a Siemans fuel sytem. They are a tough engine.

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I Like Case

04-02-2005 12:09:41

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

I have one with 540,000 miles on it. I rebuilt it 2 years ago for a scored liner. An Eistien associate decided to help me out and turned the pump up so far it washed down the cylinders. I put in new liners, pistons, rings and bearings, belts and hoses and had the pump O/H for under $1500 doing the labor myself.

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Allan in NE

04-02-2005 12:31:24

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Re: IH DT466 engine faults in reply to I Like Case, 04-02-2005 12:09:41

Hey Case,

Odd you should bring that up. I was just in town talking to the "Red Mech" who has lived and breathed these old IHs all his adult 70-some years.

I asked him if he had a dyno so that he could break in my new motor on my 966.

He told me that he wished he knew who had started that silly rumor about breakin' in a diesel under a hard and heavy load. He went on to say that the first 10 hours or so, the engine needs to "loaf" and "breathe".

I asked him why? Is it hard on the bearings or what? He says, "No, under a heavy load, a new piston will try to 'sweal' due to the extra pressure of that heavy load and the resultant heavier "fire" and things are just too darned tight in there. The piston and liner will then score."

Says he has seen it more than a few times on new diesel engines.

Dunno,

Allan

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Allan in NE

04-02-2005 11:16:20

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Re: IH DT466 engine faults in reply to Hayman, 04-02-2005 10:52:22

Hayman,

Just talking about one of those engines about 30 minutes ago in at the Red Shop.

Don't know about the trucks, but the word I hear is that the oil pumps are the stinkers. The original ones had a piston pump and they were later replaced by a gear type oil pump?

Dunno, but they sure look like one heck of a monster engine, that's for sure.

Allan

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J. Schwiebert

04-02-2005 12:48:32

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Re: IH DT466 engine faults in reply to Allan in NE, 04-02-2005 11:16:20

Are you talking the piston pump for the diesel fuel system? Remember there is 3000 psi of hydraulic oil pressure in the cylinder head. Engine oil pump is a G-rotor pump.

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