Need to change the Head Gasket on my Yanmar 1610 Tractor-Engine 3T75U-Need advice

[pokemahoney]

I just noticed my Yanmar 1610 Tractor overheating. I figured I had a leaking hose or something, but when I checked the coolant reservoir there was oil in it and it's getting into the radiator as well. I checked the oil dipstick, and there isn't water in the oil pan. I figure I must have blew a head Gasket, but the tractor runs fine except it bogs down when I use the FEL to curl up on a load. This old engine is getting tired. I've changed Head Gaskets on my cars. They were all gas engines. Is there anything I need to know , or should check when changing the Head Gasket on this engine? Thank you.

 

[BravoXray]

I just noticed my Yanmar 1610 Tractor overheating. I figured I had a leaking hose or something, but when I checked the coolant reservoir there was oil in it and it's getting into the radiator as well. I checked the oil dipstick, and there isn't water in the oil pan. I figure I must have blew a head Gasket, but the tractor runs fine except it bogs down when I use the FEL to curl up on a load. This old engine is getting tired. I've changed Head Gaskets on my cars. They were all gas engines. Is there anything I need to know , or should check when changing the Head Gasket on this engine? Thank you.

It's pretty straightforward, I rebuilt a 3TNA72UJ Yanmar a few years ago, and it was pretty simple. Do you have a manual for it? My manual might cover that engine too, I'd have to look at it.

 

[pokemahoney]

Thank you! I have a service manual. Haven't dug into it yet. I noticed Hoyes have the Head gasket for around $42.00
You rebuilt the whole engine? Where did you get your parts? I helped my father rebuild a 66 mustang a long time ago. Sounds like a good project!
I deadheaded the hydraulic pump on this tractor and it sheared the bolt with the keyway off. Got a couple of backhoe hoses crossed up. Hasn't run right since I fixed that problem. Might be time for a rebuild, but for now, just a head gasket.

 

[Williy]

You should have a parts list make life easier for
you when you can see how every thing goes together

willy

 

[pokemahoney]

You should have a parts list make life easier for
you when you can see how every thing goes together

willy

Thank you Willy! I found a thread on Hoyes of somebody who has done this complete with parts list.

 

[ROUSTABOUT]

It's just like any other engine. But with a Yanmar I'd check for a crack in the head. So look for a bad place in the head gasket and if no bad place, look for a crack.

 

[BravoXray]

Thank you! I have a service manual. Haven't dug into it yet. I noticed Hoyes have the Head gasket for around $42.00
You rebuilt the whole engine? Where did you get your parts? I helped my father rebuild a 66 mustang a long time ago. Sounds like a good project!
I deadheaded the hydraulic pump on this tractor and it sheared the bolt with the keyway off. Got a couple of backhoe hoses crossed up. Hasn't run right since I fixed that problem. Might be time for a rebuild, but for now, just a head gasket.

Yes, I rebuilt it, new rings, bearings, gaskets and valve job. Got the parts from JD, the engine was a warranty job out of a JD compact tractor with only ~50 hours on it, and it's identical to the engine in my JD430.
I used it to build a 10KW genset, and it works and runs great.