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'52 B head problem

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jim fleter

07-07-2007 13:49:10

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Good morning all, thanks in advance for the forum.
Recently bought a project tractor that has me stumped. the tractor was drained of water prior to purchase -i assume it has set for a couple of years. I add water and it leaks out of the bolts that secure the in/out manifold under no pressure.
the head had been reworked and had new gaskets. I take the head to the head shop and it tests ok for pressure and its flat. The manifold sits flat on the head. there appears to be a little milkiness in the oil upon draining. The head guy says that maybe the studs need locktight or dope and try radiator sealand to seal it all up, or both - I'm skeptical. Have no info on the condition of the block. Any ideas would be helpful. Thanks

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Jason Z in MO

07-09-2007 14:19:58

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Re: '52 B head problem in reply to jim fleter, 07-07-2007 13:49:10

You said the head was checked under pressure. I assume you were talking about the intake, exhaust valves and mating surface but did you check the push rod sleeves? Machine shops not familiar with two cylinder Deere heads probably won't know this.

I think in your head there should be two sleeves pressed into the head. 2 of the 4 pushrods pass through them. These tubes were made of steel at the factory and will rust away causing water to enter the engine. New brass ones are available from Deere. I would replace if they haven't been, cheap and easy.

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johns48jdb

07-08-2007 04:50:18

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Re: '52 B head problem in reply to jim fleter, 07-07-2007 13:49:10

i'd buy new bolts to put in and you need to look at the bolts. they are flat on one end. that end goes into the block. the jd mechanic that put mine on had 50+ years as a jd mechanic and told me to really torque them down. i have heard others say not to set the hard because it will crack through into the block, but he set down on mine for all he was worth. i'd be tempted to retap the threads down in the block if i had it to do over and he didn't put any sealer on them, but i wish he had, but then i don't have any leaks after 7 years.

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johnlobb

07-07-2007 16:50:46

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Re: '52 B head problem in reply to jim fleter, 07-07-2007 13:49:10

On all the late model B's, you MUST install lead washers under the head nuts when installing the head. I found out the hard way, guy I bought mine from said he had the head redone, put it back together, never knew about the lead washers (avail from JD dealer)and I had milky oil too. The JD dealer also told me that the torque spec on B's had changed, it was now 105 foot lbs. Good luck!!!!!

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P Browning

07-07-2007 17:37:20

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Re: '52 B head problem in reply to johnlobb, 07-07-2007 16:50:46

johnlobb - - - For the second time - - -

NO- THE HEAD TORQUE SPEC ON B'S IS NOT CHANGED!!!!! !

The cylinder head torque call out went from 96 to 105 ft-lbs ONLY with factory installation of heat-treated studs which started at B-248284 -- or for what one may call the "late model B tractors".

This IS NOT A CHANGE! This spec has been on the books since August of 1949 per Field Service Bulletin 163-S.

And you can quote me to this dealer who is telling you the spec has changed. HE IS WRONG.

(PatB)

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Bob

07-07-2007 16:05:57

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Re: '52 B head problem in reply to jim fleter, 07-07-2007 13:49:10

Drain the coolant. Remove the bolts or studs. Dry the threads in the head with compreseed air. Maybe wouldn't even hurt to clean them with a shot of carb cleaner, and blow dry.

Then, put pipe dope on the threads, and put it back together.

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