YM155D issues: maybe head gasket, maybe radiator, maybe?

[Neat 1500]

As a collective on this forum we can solve almost anything anyone can come up with due to the knowledge of many individuals that make this a great forum to be a part of. This is the best forum for constructive help and knowledge that I am a part of and I'm on many forums and groups :thumbsup:

 

[winston1]

I think this might fit it in this thread pretty good. New radiator screen from Hoye some might want to take advantage of. New Product - Radiator Screens - Yanmar Tractor Support Message Board

 

[normde2001]

Tstats can just be tested in water. Usually, (at least on autos), the opening temp is stamped, 170-190*. If not open by boiling time, pitch it. Temp gauges and temp lights require different sensors.

 

[clemsonfor]

I was thinking I hadn't seen that item yet. Then looked at his posting date!!! It's today!! No wonder why I had not seen it. And I was even on their website yesterday!

 

[graysonh]

Happy to report I had a fantastic weekend with my tractor, finally able to relax and enjoy the ride a little and not worry about things so much. Regarding the overheating, I think the biggest thing has been to just slow down, rely on torque and not power, and not overload the mower/pto (RM42, which after all is a finish mower and I'm kind of using it as a brush hog). Coming uphill in Low-3 instead of High-1 has been a game changer, and there's been very little black smoke and no spit from the radiator overflow. Cetane has also been wonderful in getting the engine started like a dream.

There are likely still some issues that I need to sort out but as long as I don't ask too much of the machine for now I've got time to sort it all out. Over the next few weeks I'll check valve clearance, t-stat, and keep looking for signs of a leaking head gasket. But it's a great feeling now that I'm not convinced my engine is about to crack anyday now :thumbsup:

Thanks for the all the help, this place is great!

PS have NOT hooked up the temp gauge. Maybe mine will stay in the box too. But I do need to test the temp warning light still! And change that darn hydraulic fluid.

 

[California]

See Winston's post #15 above. That's a simple tractor, there's no thermostat.

It is a good idea to check valve clearance (and head bolt torque while you are in there).