Cooling Issue

[Paul Campanis]

Is there coolant in the base pan/oil?

No, just oil. Also no oil in the antifreeze.

 

[oldtimer 66]

Knowing that new John Deere parts are extremely expensive, the Yanmar rebuild kit maybe be cheaper in the long run. There you would have all of the parts you would need but you could just pick and chose which ones you would want to use. Just a thought.

 

[Paul Campanis]

Knowing that new John Deere parts are extremely expensive, the Yanmar rebuild kit maybe be cheaper in the long run. There you would have all of the parts you would need but you could just pick and chose which ones you would want to use. Just a thought.

I love your idea. Where would I find such a kit for a Yanmar 3T80UJ engine? I tried searching the Internet with no good results.

 

[Paul Campanis]

Isn't this a Yanmar engine. You should be able to cross reference your engine model to a comparable Yanmar engine. From a quick look on line there seems to be plenty of Yanmar new parts available. A complete rebuild kit $469, sleeves, pistons, rings, bedarings, gaskets etc. Overhaul Rebuild Kit Fits for Yanmar Engine 3T80 3T80LE 3T80LE-HP 3T80

Thank you !

 

[Paul Campanis]

Isn't this a Yanmar engine. You should be able to cross reference your engine model to a comparable Yanmar engine. From a quick look on line there seems to be plenty of Yanmar new parts available. A complete rebuild kit $469, sleeves, pistons, rings, bedarings, gaskets etc. Overhaul Rebuild Kit Fits for Yanmar Engine 3T80 3T80LE 3T80LE-HP 3T80

Thanks, that looks great.
Is it difficult to remove the cylinder sleeves?

 

[etpm]

Before you remove the sleeves maybe determine if you need to do so. Your original complaint was overheating and a pressurized coolant system. Now it looks like a blown head gasket is the culprit. Find out first why the engine overheated and then determine which components need replacing. Find out why the head gasket failed. Talk to the folks checking the head and ask them about the sleeves. Please make sure you can do the work required so that it doesn't need to be done again.
Eric

 

[stephanadams]

Does tractor have thermostat?

Speed Test​

 

[Paul Campanis]

You will need to replace the head gasket anyway but it looks to me, from the pictures, like a blown head gasket, especially the center cylinder. I dunno what the part is you are showing but it should be pretty easy to find out where it goes as there are probably two more of the same part. In any case the head needs to be checked for flatness. Might as well check the block too. This can be done by yourself with a good straightedge and feeler gages. But you need to be using a known good straightedge and know how to use feeler gages. Not rocket science by any means and anybody can do it you just need to learn how. I have good straight edges and can check them for straightness within .0001" in 3 feet, but I have a machine shop. You can take the head to any decent diesel shop and they too can check for flatness and if not flat enough they should be able to show you exactly where the head deviates from flatness and how much material needs to be removed if the head is too far out. There YouTube videos, I am sure, that show how to check flatness with a straightedge. In any case don't be tempted by a cheap Chinese straightedge. It may be good, it may not be. If you do go that route then buy two and check them against each other. I have done this for a friend. The straight edges bought for so cheap were not as straight as advertised. I fixed them as a favor.
Eric

Thank you for the input. The head is at an excellent machine shop being checked for geometry and cracks. I am considering getting two of these straight edges in the link below as you suggest. I would like to check the block which is still in the tractor. The head is off at the shop. I dropped the oil pan and pushed the cylinders out of the top. The middle one had aluminum smeared all over the rings. The other two look ok. When I have the head back on I plan on fixing the middle piston by replacing the rings only. Then I will check compression on all three cylinders.

Please advise...
What am I missing?

Amazon.com

 

[etpm]

Thank you for the input. The head is at an excellent machine shop being checked for geometry and cracks. I am considering getting two of these straight edges in the link below as you suggest. I would like to check the block which is still in the tractor. The head is off at the shop. I dropped the oil pan and pushed the cylinders out of the top. The middle one had aluminum smeared all over the rings. The other two look ok. When I have the head back on I plan on fixing the middle piston by replacing the rings only. Then I will check compression on all three cylinders.

Please advise...
What am I missing?

https://www.amazon.com/Anodized-Aluminum-Tolerance-Straightness-Machinery/dp/B08VS7M9FL[/U

Are those straight edges long enou...the surface can be felt and stoned away. Eric

 

[GMIslander]

Thank you for the input. The head is at an excellent machine shop being checked for geometry and cracks. I am considering getting two of these straight edges in the link below as you suggest. I would like to check the block which is still in the tractor. The head is off at the shop. I dropped the oil pan and pushed the cylinders out of the top. The middle one had aluminum smeared all over the rings. The other two look ok. When I have the head back on I plan on fixing the middle piston by replacing the rings only. Then I will check compression on all three cylinders.

Please advise...
What am I missing?

Amazon.com

Why not clean the pistons up, new rings on them all, do a bit of fine emery cloth swirl to break the glaze on the sleeves and there all the same.