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856 blowing water out radiator

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Larry B.

05-16-2004 15:24:31

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I need all the help I can get on this one. My 856 diesel pushes water out the radiator. Have changed thermostat,radiator, cap, and the cyl. head three times and still water gushes out the radiator. The head gasket never blowes and no sighn of leaking around it. As soon as you start it and have the cap off, it looks like oldfaithfull. It's a dry sleeve motor so it can not be leaking there. Anything we do , still the same. Could there be anything in the block. No water geting in the oil or oil in the water. Tractor runs fine,no blow by in crankcase. Three different heads and head gaskets and all the samething. About to pull my hair out on this one.

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W. Burt

05-24-2004 12:26:32

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

I own 3 1466's and the last one I bought was doing the same thing. Changed thermostat, radiator cap, checked waterpump, put on a head gasket. Last resort pulled radiator, a third of the flues were stopped up, radiator disintegrated, had to buy one at the salvage yard for 3000.00. Old blackstripe never heats halfway now. Man I bought it from used it to move mobil homes around , probable problem arose from lack of use.

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IHM 46

05-17-2004 20:04:30

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

Have you thought about the injector tubes

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Larry

05-17-2004 06:57:32

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

This may be a long shot, but I have had this happen with a couple of JDs. It turned out to be a bad water pump seal. Apparently air is sucked past the seal. Larry

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Allan

05-17-2004 08:27:06

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Re: Re: 856 blowing water out radiator in reply to Larry, 05-17-2004 06:57:32

Larry,

Pull your waterpump belt off and run it for a few minutes and see if there is any noticable difference.

might save you the cost of a water pump if you don't need it.

Just an idea,

Allan

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steve

05-16-2004 19:43:04

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

i worked on a 856 about 10 years ago and it was doing exactly what yours is. it turned out the block was cracked about 2 inches from the head surface,about the area where the head bolts end we pressure checked with air pressure through injector hole to figure witch cylender and when we pulled the sleeve the crack in the block was very visible.combustion gases went betwine sleave and block and through crack into cooling system
rn

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Redman

05-16-2004 19:28:41

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

did you check the deck on the block?from what you are saying it has to be the area between the head and block as a sleeve would put pressure on both ends.sounds like the head is not seating,do the injector pressure test that should tell you which one is the culprit.

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lee

05-16-2004 18:53:20

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

Rig an air compressor line in some fashion thru the injector port to pressurize the cylinders one at a time should be able to isolate the faulty
cylinder checking for air bubbles in the radiator.
hairline cracked sleeve/block?

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Superman

05-16-2004 17:55:51

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

Larry: Try a pressure test on the cooling system, hot and cold.Do not exceed 18 PSI. Coolant should show up somewhere after a while.

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Allan

05-16-2004 16:31:28

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

Larry,

What happens if you fill it up, put the cap on and then run it for a time? Does the engine actually puke all the water out and then get hot?

I've had four of these diesel sweethearts over the years and every one would "slobber" for quite awhile after filling if it was filled right to the lip.

It is like their "running level" needs to be quite a bit lower than full to the lip.

Just thinkin' out loud,

Allan

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Allan

05-16-2004 16:15:12

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Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 15:24:31

Larry,

What happens if you fill it up, put the cap on and then run it for a time? Does the engine actually puke all the water out and then get hot?

I've had four of these diesel sweethearts over the years and every one would "slobber" for quite awhile after filling if it was filled right to the lip.

It is like their "running level" needs to be quite a bit lower than full to the lip.

Just thinkin' out loud,

Allan

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Larry B.

05-16-2004 16:53:30

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Re: Re: 856 blowing water out radiator in reply to Allan, 05-16-2004 16:15:12

With the cap on, it will go out the over flow and won't quit. There are air bubbles in the radiator so I am thinking compression in the water system but don't know where from. All three heads can't be bad and be do the samething. I know the water level in the radiator has to be lower than the fill neck just above the core. I also have four other IH tractors, a 706-two 806's & 1206. Any other suggestions? Use all the help I can get on this one.

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Allan

05-16-2004 17:41:53

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Re: Re: Re: 856 blowing water out radiator in reply to Larry B., 05-16-2004 16:53:30

Larry,

This is a bummer....sure sounds like compression.

Just throwin' out ideas here: How about if you take one of those other two heads and have it leak tested?

Perhaps that block is warped and when you buckled down each successive head, they were being cracked at that point?

This has gotta be frustrating for you.

Allan

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