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Coolant in the crankcase

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JDRegg

01-11-2002 17:32:31




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It has been less than a year since I completed the restoration on my 1941 "B". Upon checking the crankcase oil level, I found the oil was a greyish color. When I drained the oil there was quite a bit of coolant that came out. What could be the problem?
Also this tractor starts very hard in hot weather, or when the tractor is hot. It starts on the second turn of the flywheel in all other conditions. When i have pulled the spark plugs out, they are very fouled. I am using Champion D16s. would a different plug be better?
Thanks for the replies

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mrm

01-11-2002 19:19:50




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 Re: Coolant in the crankcase in reply to JDRegg, 01-11-2002 17:32:31  
I just had same problem with my 1935 B.After two
years after restoration it sat for a year got it out and coolant was low ran it some noticed oil was milky.The only part not replaced was the push rod tubes .pulled off valve cover and it was very easy to see where leak was.Parts are still available at JD dealers.I put all new ones in you
can do it with the head on.I made a puller from
3/8 inch pipe with a all thread welded to it,tap
old tubes and screw in pipe slip bigger pipe 1 1/2
in over all thread,find big washer and nut and draw up and pull tube into the pipe removing it from the head.The holes in my head were not machined very good from new some tubes fit loose I
had to smear some J B weld around them to seal them,Make a driver and drive in the tight ones[their to be snug fit]flush then get something tapered and drive in end to flare out. Look at the old ones and try to match taper.So far it has worked.JD service manual tells about this but they
use JD tool # so and so I make most my own tools
as originals probabaly aren't around.

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Lowell

01-11-2002 19:06:55




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 Re: Coolant in the crankcase in reply to JDRegg, 01-11-2002 17:32:31  
Do you have lead washers under the cylinder head nuts? the factory used them to prevent leakage around the studs.



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Clooney

01-11-2002 18:24:16




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 Re: Coolant in the crankcase in reply to JDRegg, 01-11-2002 17:32:31  
~JDRegg, the coolant could be leaking into the crankcase from a number of places including head gasket, head, block, or pushrod tubes (they let the push rods run through the water jacket of the cylinder head). My money is on the push rod tubes, especially if they weren't replaced during the restoration.
~It might be difficult to determine where the leak is coming from but if you raise the rear of the tractor so the engine is slanting forward then pull the rocker cover & look closely at the push rod tubes you will probably be able to see water dripping from the leaking tube (it the tubes are the cause of the leak)
~If the tube(s) aren't dripping coolant then re-torque the cylinder head while you have the cover removed & see if the leak stops, if not you should probably pull the head & check the gasket, the head for warping & look at the block.
~The hot starting problem could be kind of normal as some old Deere's do tend to start hard hot, or by the sound of your plugs you could be over choking or have the idle set too rich. Try starting with different throttle settings, & no choke. Another problem could be the ignition coil getting weak & heat makes it worse. It wouldn't hurt to replace the plugs & wires if they are old or not solid metal center wires. You might want to push the throttle to wide open after shut down to let the fuel vapor out & see if that helps. Do not shut the tractor down by choking or stalling, shut the fuel off & let it run out of fuel. On those old hand starts try different carb settings, timing settings & idle screw adjustments until you find a set up the allows easier starting, sometimes all it takes is a little change in starting procedure to get them to start easier.

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Gman

01-11-2002 17:55:29




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 Re: Coolant in the crankcase in reply to JDRegg, 01-11-2002 17:32:31  
JDRegg when you restored your tractor,did you install or have someone install new exhaust manifold studs. A lot of times in removing the manigold studs you will accidently drill into the little copper tubes that the push rods go thru,and bingo you got a leak,and those suckers can be a pain to find and replace.If you pull head be sure to check pushrod tubes,Later Gman



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Ted K

01-11-2002 17:40:11




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 Re: Coolant in the crankcase in reply to JDRegg, 01-11-2002 17:32:31  
The leakage into the crankcase must be from either a cracked block or head or a leaking head gasket. Your plugs are fouled from the coolant getting into the combustion chamber or from bad rings letting oil get past. When it starts does it smoke white until it warms up? This would be from the coolant in the cylinder(s). Good luck. Ted K



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Wes

01-11-2002 18:01:22




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 Re: Re: Coolant in the crankcase in reply to Ted K, 01-11-2002 17:40:11  
Have you watched the coolant level in the raidiator? Have you had to add to it? Cast iron will draw a lot of moisture from just setting. It will sweat a lot. Do you get blow by or water bubbles out of the raidator when you have the cap off while it is running? Has the coolant got a oil film in it?



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