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John Deere Tractors Discussion Forum

MT with watery oil

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Jolly

05-13-2006 20:25:24

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Hey guys...

Pride and joy is an ugly (natural rust color), but loving '47 MT. Went to check the oil the other day, before doing some disking. Oil was about a quart and a half higher than what was in there the last time I checked back in December. Drained the oil and its grayish in color and really thin, almost watery. Checked the level of anitfreeze, was still very green, no apparent containiments.

Would this be a cracked block or blown head gasket? Not sure how to determine either instance. Are the vertical two-cylinders prone to problems like this?

Could gas somehow dilute oil like that?

Thanks...

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Jolly

05-14-2006 17:13:30

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Re: MT with watery oil in reply to Jolly, 05-13-2006 20:25:24

I did some further investigation today. The Touch-O-Matic level seems about right. I pulled the valve cover off (a little bit of white foam junk on the top of the cover). No obvious cracks that I could see. Tomorrow I'll probably pull off the head and HOPE to see a blown head gasket. I think the oil was definitly too "milky" to be from a leaky hydraulic pump seal.

I thought maybe the water could be from condensation. We run a 4ft snow blower off the back to clear the driveway of snow. We used it once in Nov. just for kicks. Other than that it sat most of the winter. Is it possible that much water could accumulate from condensation over a warm winter?

Just curious, how would you pressure check a coolant system that doesnt rely on pressure in the first place? Just for kicks I put my mouth on the radiator filler cap and blew. Air just escaped from the boil over line (or what ever it is).

Anybody know how a head or block would crack, or how a head gasket would blow like that? The tractor barely ever gets to operating temp. And it never sees hard work. I finally got a disk and was looking forward to really making her work, what a great sound!

Thanks for everbody's input!!!

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Sam S.

11-03-2006 19:59:52

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Engine Shop in Mpls? in reply to Jolly, 05-13-2006 20:25:24

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LFN

05-14-2006 05:52:40

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Re: MT with watery oil in reply to Jolly, 05-13-2006 20:25:24

These little tractors had a nasty habit of heads cracking. I bet if you remove the valve cover you will see the crack, right next to the middle two valve springs. I tried to weld a couple times but back then didn't have nickle rod as is available now.

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leon

05-14-2006 13:27:09

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Re: MT with watery oil in reply to LFN, 05-14-2006 05:52:40

You're probably right. In the wee hour of the morining I didn't see the part about the grayish color of the oil. I too would sure look for a coolant leak into the crankcase before tearing the hydraulic pump off.

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Henry M

05-14-2006 04:55:38

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Re: MT with watery oil in reply to Jolly, 05-13-2006 20:25:24

Was the antifreeeze low?

Is the touch o matic low?

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johns48b

05-14-2006 04:36:50

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Re: MT with watery oil in reply to Jolly, 05-13-2006 20:25:24

some water condenses sometimes when a tractor has been sitting, but thats to much in this case. can you get a pressure tester for radiators and see if it will hold a set pressure. that will tell you if you have a crack block, head or blown head gasket. you'll probably have to pull the head if you do. any auto machine shop should be able to check your head and block for cracks. did you have fresh anti-freeze in it?

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leon

05-14-2006 03:32:34

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Re: MT with watery oil in reply to Jolly, 05-13-2006 20:25:24

If the engine oil still looks normal, not milky, could it be that you've lost a seal and are getting Touch-O-Matic hydraulic oil into the engine? Most likely and not real uncommon.

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