Oil & Fuel YM2500 Pushing Coolant Out the Radiator

[careyo63]

Pressure up checked the cooling the Sys.. How high did it Get ? Hopefully just the water Port. Until he pulls the head and checks it for cracks or even warped May not even be repairable. The apparent damage doesn't look good.? I would of Checked that Piston Cyl. pressure Esp. on the bad one and see if it stayed up. He's pulling the Head and Injectors lines anyways. Not much to it, Alls good then that would be a big plus factor.

 

[Travis_R]

***UPDATE #2 07-17-2025***

Look at all the copper!!

I spoke with my mechanic and he sent me a few pictures. He thinks the head gasket wasn't sealing because there was so much copper applied!
He said it was very thick on there and doesn’t know why the mechanic at Fredricks put so much copper.
My mechanic doesn’t use copper at all.
He’s going to remove the studs, clean everything up, and make sure the block is flat then go from there.

 

[ponytug]

***UPDATE #2 07-17-2025***

Look at all the copper!!

I spoke with my mechanic and he sent me a few pictures. He thinks the head gasket wasn't sealing because there was so much copper applied!
He said it was very thick on there and doesn’t know why the mechanic at Fredricks put so much copper.
My mechanic doesn’t use copper at all.
He’s going to remove the studs, clean everything up, and make sure the block is flat then go from there.

Hmmm... in the last photo, there are what look to me like hair line features that start on the block mating surface and continue down into the block; one from the stud with the pool of oil, down into the tappet channel, and one from near the stud to the right, which I think is the same area of concern from your exterior photos.

If there aren't visible cracks once the block is clean, I think crack testing by dye or magnaflux might be prudent. Again, this is just armchair quarterbacking from a long way away.

All the best,

Peter

 

[careyo63]

***UPDATE #2 07-17-2025***

Look at all the copper!!

I spoke with my mechanic and he sent me a few pictures. He thinks the head gasket wasn't sealing because there was so much copper applied!
He said it was very thick on there and doesn’t know why the mechanic at Fredricks put so much copper.
My mechanic doesn’t use copper at all.
He’s going to remove the studs, clean everything up, and make sure the block is flat then go from there.

Prev. post #114 and it pretty much proves it. Somebody Rolled it on with a rolling Paint brush. Seriously though that's a lot!! Wish I was at that shop to hear all the comments. IMO. the shop doing his best! eventually they're get it all straightened out. Good thing is at least you have parts for that model.

 

[Travis_R]

***UPDATE 07-18-2025 Friday***

I received a call from my local tractor repair shop this morning.

He got the block and cylinder head all cleaned up.
He tried to explain to me what he done to the top of the block where the head gasket sits, but I didn’t quite understand what he was talking about. I believe it had to do with making sure the surface was flat. He has a tool or something that he uses. He said the block is in good condition though.

He said everything looks good, but is sending the cylinder head to a machine shop to have it checked out and make sure it’s “true.”
I completely agreed with him on sending the head off because it’s the right thing to do and we will know that it’s good to go.

I sent an email to Danny and Stephen at Fredricks Equipment explaining to them what was going on and requested all the parts that my mechanic needs to put the engine back together.

(1) Engine Oil Filter……………OF-4085
(1) Head Gasket…………………HG-150
(3) Exh. Manifold Gaskets…MG-150
(1) Intake Gasket………………IMG-1150
(1) Muffler Gasket……………..MG-1450
(1) Valve Cover Gasket……..VCG-1150
(1) Water Pump Gasket…….WPG-4450

I’m waiting on them to reply back at anytime now.

 

[bmaverick]

To check the block and the head, this is the typical Yanmar and Deere method,

 

[bmaverick]

He did something with the block (decked it?) and said it was good. I know he checked it out real good.
Sending the head to the machine shop to make sure everything is good like it’s supposed to be.

Read this to understand decking an engine block.

https://enginetech-ca.com/services/engine-block-decking/