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brucek
40C crawler
40C crawler
Posts: 10
Joined: Sun Mar 22, 2015 3:49 pm
Location: Upstate NY

Need help

Post by brucek » Sun Jan 15, 2017 4:45 pm

My jd 350 straight diesel is getting coolant into the oil. I pressurized the radiator and took the oil pan off and see no air or water leaking from the piston sleeves. Took the head off and the gasket and surfaces look good. So I am unsure how the water was getting in there. Engine ran fine even with the milky oil but that would not last long so I tore it down thinking this would be an obvious issue to spot. Where else could it be coming from

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gregjo1948
350 crawler
350 crawler
Posts: 1000
Joined: Mon Aug 30, 2010 5:58 am
Location: Newark Valley,NY,USA

Post by gregjo1948 » Mon Jan 16, 2017 4:32 am

Can it be leaking past the o-rings on a sleeve?
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17, 1620 Ford

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jsal
1010 crawler
1010 crawler
Posts: 363
Joined: Sun Oct 28, 2012 6:27 pm
Location: armada Michigan

Post by jsal » Mon Jan 16, 2017 5:22 am

the way that happens could be pitted liners or deteriorated seals just pulled my
350 apart for low compression removed liners and seals were very pour I also
have an issue with a crack between cyl 2&3 hoping head gasket will seal enough to keep water where it belongs as their are no seals in the counter bores . you need to inspect your liners.


JIM

brucek
40C crawler
40C crawler
Posts: 10
Joined: Sun Mar 22, 2015 3:49 pm
Location: Upstate NY

Post by brucek » Mon Jan 16, 2017 5:40 am

Engine was rebuilt just befor I purchased it. I was told the head was also rebuilt. Maybe 3 to 4 years ago when the motor was gone through. If needed I will pull the sleeves to inspect but can they be reused? Is my hope of a simple head gasket replacement a poor guess as to repairing this? The machine did always make coolant slowly disappear since I owned it. But I never found where it was going. Not like now it is obvious. Radiator was removed and pressure tested in the past and was good. I would think if a sleeve seal/ o ring failed that there would be a test method in lie of removing them? Thanks for the help guys!
Jd 350 crawler loader 4 in 1 with backhoe/ John Deere MT/ MF 175/ Ford 800

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Stan Disbrow
350 crawler
350 crawler
Posts: 2894
Joined: Fri Jul 15, 2005 3:13 pm
Location: Raleigh, NC

Post by Stan Disbrow » Mon Jan 16, 2017 7:17 am

Hi,

Before I pulled anything apart, I would pull the oil drain plug and leave it out with an empty pan under it. Then, I would put a modified radiator cap on and hook it to a portable air tank with cooling system operating pressure on it. See where the cold coolant comes out.

Stan
There's No Such Thing As A Cheap Crawler!

Useta Have: '58 JD 420c 5-roller w/62 inside blade
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Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)

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jsal
1010 crawler
1010 crawler
Posts: 363
Joined: Sun Oct 28, 2012 6:27 pm
Location: armada Michigan

Post by jsal » Mon Jan 16, 2017 7:32 am

you have the head off and the pan off take the pistons out and pull the liners your that far along go for it !

JIM

brucek
40C crawler
40C crawler
Posts: 10
Joined: Sun Mar 22, 2015 3:49 pm
Location: Upstate NY

Post by brucek » Mon Jan 16, 2017 8:23 am

Well it sounds like the experts here think the sleeves need to come out for further investigation. Although I saw no visible sign of leak with the coolant system pressurized.... I will yank the sleeves tonight and let you know what I see. Thank you all!
Jd 350 crawler loader 4 in 1 with backhoe/ John Deere MT/ MF 175/ Ford 800

original possum
1010 crawler
1010 crawler
Posts: 258
Joined: Wed Sep 11, 2013 3:34 pm
Location: Shiner, texas

Post by original possum » Mon Jan 16, 2017 9:59 am

Magnaflux the head, looking carefully around valve ports.
Early 40C w/Yakima toolbar and homebuilt ripper: 350 w/6-way

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