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John Deere Tractors Discussion Forum
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John Deere D- Water in crankcase

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John Elko

09-29-2004 17:19:58




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I have a 1937 D and I am getting water in the crankcase. the engine starts and runs really nice, no blue or white smoke and there is no oil in the radiator just water getting in the oil. i draind a quart of water from the oil plug about 2 weeks after oil change. I thinkk it might be a bad head gasket. Does anyone know what else i can look for. Thanks John




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Bob-Wyo

09-29-2004 20:25:50




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 Re: John Deere D- Water in crankcase in reply to John Elko, 09-29-2004 17:19:58  
John I assume the radiator water level is going down the same amount? before you do anything, pull the valve cover off (6 3/8 bolts) and with a light, look down the valve push rod channel and see if you can notice water driping, this may tell you a little if its coming from gasket, head or block. might even pay to pull the push rods out of the way, just loosen the 4 cap bolts (9/16 wrench) and unscrew the adjustment plugs with big screwdriver, rods will then come out the plug holes. Water on a D can not leak out the back end of the block, has to be up in front area.
Good luck JOhn, hope it's just a gasket, if it is you will have to change it as it is leaking to much to just retourqe the head and you have to pull the radiator to do it, but if you find them a little loose and they are not at 208# you might try to tourqe them up and throw 2 hands full of black pepper in the radiator before you fill it, depends on what you intended use for the D is. If it were me I would pull the head and at least then you can have a look at the valves and bore wear. Gasket is 24.00 from Deere, best deal going.
If we can help you any more just let us know, Bob

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John Elko

09-30-2004 16:40:36




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 Re: John Deere D- Water in crankcase in reply to Bob-Wyo, 09-29-2004 20:25:50  
Bob Thanks for the info, i was also wondering if i have to soak the head gasket in oil before i install it? It is the new style gasket with a new material in between the two metal halves. It is not the old aspestius gasket that they used to use. Also normally one would retork the head hot but it looks impossable to do this as you have to pull the radiator to do this. do you know what cold valve clearences are?Thanks John

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Bob-Wyo

09-30-2004 19:49:47




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 Re: John Deere D- Water in crankcase in reply to John Elko, 09-30-2004 16:40:36  
John just reread your post, do you think that water could have been trapped in the engine some where? like some in the 1st reduction cover etc.
Did it set out in the rain or did you wash it lately,is top cover sealed tight? just shooting in the dark here for easy answer for you. Have you done a second check to see if water is still showing up at the same rate? No don't soak the gasket, I do use copper kote on mine, go heavy just below cyl's but don't get any one the fire rings,( the 1/4th" around the cyl openings)
ON the valves, bring up the LH EXHAUST mark just before case mark, this should leave all valves closed, if not go one more complete turn, then take up push rod slack till you get zero play and back out adjusting screw 1/2 turn + 1/4th flat. this will be good enough for starting and give about .035 clearance. After it warms up do the same only back screw out 1/2 turn from 0 lash, this will give you .030.
Ok on the retorque I know what you mean, bet 7 out of 10 engines have never been retorqued and have run for years, here its 10 out of 10. by the time you drain it and get the radiator and valve train cover off its cooled down some anyhow, just my .02 on that subject, but after 70 years I have never had anyone say hey after you run that a while bring it back in and we will retorque it for you.
Just torque it up in 20# increments, start on the middle bolt and work out even in all directions from it.
Hope this helps some John, if not just post back.
Bob

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john elko

10-01-2004 18:38:14




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 Re: John Deere D- Water in crankcase in reply to Bob-Wyo, 09-30-2004 19:49:47  
Thanks for more info Bob, when I first got this tractor in august i suspected some water got in the crankcase due to sitting outside. so i drained oil flushed crankcase with kerosene and replaced the crankcase cover gasket. the oil seemed good at first but soon started turning milky. after a couple of weeks i loosened the drain plug and got at least a quart of water from it, maybe a little more, Just a few days prior to that i opened the oil level cock and let it drain till it stopped then went back a few days later and it was well above the cock level again. I use a wooden dowel to see if the level in the radiator was going down and it was. It seemed very little but the upper tank holds so much a small level drop could still mean a lot of water. Also there are 9 head bolts but the parts book says 18 lead washers are used. do i need to double up the lead washers on the head bolts or use one?thanks again. John. Email me if you would like to.

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bw in mo

09-29-2004 18:02:42




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 Re: John Deere D- Water in crankcase in reply to John Elko, 09-29-2004 17:19:58  
THERE IS A POSIBILITY THE LEAD WASHERS ON THE HEAD BOLTS, JUST BEHIND THE NUT. CHECK SEE IF YOU SEE A LEAK THERE.



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