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Muleman: I have a master guide showing bolt torque taking into bolt tensile strength, fine or course threads, metric or US standard, integral washer head, and oiled or dry threads. It came in at 28 ft lbs so I feel perfectly fine with 25 ft lbs bolt torque, especially since I used mystic JT6 on...

Follow-up: I ordered the top end gasket set and had the head professionally shaved. It took almost .020" to get it flat. There are signs of serious overheating but there doesnt appear to be any internal problems with the pistons or rings (I didnt remove them but the cylinder walls are almost...

Would anyone have the correct head bolt torque value for this engine (GZ460F)?

The head is at the machine shop now. I still dont know the root cause of the blown head gasket. I dont know if the engine overheated and then blew the gasket, or if the gasket blew first then overheated. Knowing Kubota's rock solid reputation throws a wrench in the works, as no one I have...

Well, the 5% got the better of me late Saturday afternoon and I pulled the head. This engine has two free-standing cylinders, also called a wet-deck block. The head gasket is made from two metal shims with what appears to be a sealing coating and a raised ring that seals the cylinder to the...

That is where the remaining 5% of doubt is. The amount of scale that was inside the filler neck is hard to explain, easily enough to reduce the radiator's capacity by 50%, if it made its way down there. The radiator is not that easy to access so I'm not going to pull it just for grins. I'm...

I installed the new filler neck and some Prestone Super Flush (about 1/3 of the bottle) and clean water. I then ran it for about 1 hour and operated it hard. The temperature cycled up and down, from just above the cold mark to just under the hot mark, and the cooling fan came on periodically...

The filler neck is seriously eroded and warped. If it overheated, it was bad enough to warp the plastic. In 43 years of automotive work, I have never seen one this bad. Also, the inside of the neck is coated in what looks like cement or calcium, about 1/16" thick, like someone poured...

I did a very thorough inspection today and found that the plastic radiator cap neck, mounted in the upper radiator hose, was severely deteriorated, to the point where the radiator cap could not seal properly. A new neck is a couple of days away when I will continue the diagnostic process.

Thanks, thats the first thing I will check. What worries me the most is how fast it begins blowing coolant out of the bottle. The temp gauge never got over half way and it was blowing a steam geyser about 2 feet out from the right side of the ATV.

We just purchased a used 2009 RTV 500 with just over 1000 hrs at an auction. We werent able to perform a thorough inspection of the RTV but we were able to start it and move it back and forth. When we got home and started using it, it overheated very quickly, blowing coolant from the overflow...