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Over heating

J

JustHayin

New User
Got a 4230 diesel, started over heating keeps boiling over out of the blue. Changed the water pump and thermostats. Radiator seems to be clean but not sure. Any suggestions?
 
S55's comment is on track. test kits for combustion gasses in the coolant are available at almost all Autoparts stores. Jim
 
"radiator seams to be clean but not sure." the inside of tubes can be plugged up not allowing circulation. the outside of core can be perfectly clean and it will heat.look inside rad with flashlight and see how tubes look. when plugged they will have white calcium showing plugging tubes. what is the heat guage showing? when is it heating? under no load or working load?
 
I bet If you start washing the fins you?ll find a lot of dirt you can?t see . Had a pickup overheating and I pulled the radiator out took it town cost 25$ to get it clean
 
Hello JustHayin,

If you are losing coolant from the radiator overflow you may have a head gasket leaking combustion gasses into the cooling system. One indication would be seeing bubbles in the radiator. Also if would pressurise the cooling system. Have you checked the radiator cap. If does not hold rated pressure it may be the reason of the overheating. Could be as simple as a bad radiator cap,

Guido.
 
Under load, I ran it at pto rmps for 30 minutes or so in the shop. The temp went to normal. Little bit came out of the radiator cap but not much.
 
clean the rad. then clean the rad. and then clean the rad.high pressure works the best also clean with oven cleaner or brake cleaner if any sign of oil or grease
 
I would just about bet that the radiator is NOT clean enough for summer weather. Slide the hydraulic cooler out so you can get at the radiator better. ( The cooler will only slide out if your tractor has a cab and AC.) If it is not that then you will have to work around the cooler. I have often had to totally remove the radiator to really clean them well if they are loaded up with oil/dirt. If the radiator is not plugged then you could have internal issues in the motor. The most common would be a head gasket failure. Even that is not that common unless severely overheated.
 
One of my college professors told us that oil or grease on any heat transfer surface will really reduce the heat transfer coefficient. I believe it. As was mentioned, make sure you clean all oil and grease and ALL OIL / GREASE FILM off. I recommend the local car wash, set the thing on HOT - WASH! Blast away. The other thing, I have been going to O'Reilly's and getting some "hy-per lube diesel coolant" and dump in the correct amount in my radiator. My MF Perkins diesel runs very noticeably cooler with that stuff. VERY much cooler. How does it work? No idea.
 
FBH - You are not kidding! Company I worked for made high production ice cream freezing machines. Places that made many semi-truck loads of ice cream used our machines. One of our bigger customers discovered that after about 2-3 weeks their new machines would not produce as much ice cream per hour, day, week as when they were brand new. We sent them brand new freezing cylinders and they returned their slightly used cylinders. They used synthetic oil in their ammonia refrigeration systems, they had water in the systems too, the water and synthetic oil corroded the outside of the pure nickel freezer cylinder, the cylinder was covered in operation with that oil, and with the corrosion it held even more oil. Which reduced capacity noticeably.

Our engineers kicked around several solutions, think they just told them to service their refrigeration system as the mfg recommended. The oil was fine, the water was fine, the synthetic oil and water was BAD. But it was crazy how much capacity was reduced with .050" of corrosion and oil.
 
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