overheating on a 555 deluxe

[kansas555]

I have a 555 deluxe that I have had a problem with overheating.it is a kubota diesel v1902 I had the water pump umpeller replaced the radiator rodded out and thremostat replaced. I thought it was maybe a exhaust leak and have replaced the muffler. THe radiator is clean. I run it for maybe 20 minutes and the temp gauge gets up to 230 and if I idle it down and open the engine cage it will cool down to around 185-190. My next thought are maybe a compression problem because I have had trouble starting the engine and have used starting fluid and saw on another site that is a no-no. appreciate your thoughts

 

[Tazza]

You have done everything i'd do. The only other thing it could be, is a blown head gasket.
As far as i'm aware, the only things taht can cause it to over heat you have addressed. Water pump, radiator, thermostat, excessive load. If the load was too high, when you throttled it back, it would stall and not cool a little.
Are the cowlings for the blower still intact too? i'm jsut wondering if you don't have enough air flow to cool it efficiently.
Thats about all i can think of, i'm sure others will have ideas too.

 

[kansas555]

You have done everything i'd do. The only other thing it could be, is a blown head gasket.
As far as i'm aware, the only things taht can cause it to over heat you have addressed. Water pump, radiator, thermostat, excessive load. If the load was too high, when you throttled it back, it would stall and not cool a little.
Are the cowlings for the blower still intact too? i'm jsut wondering if you don't have enough air flow to cool it efficiently.
Thats about all i can think of, i'm sure others will have ideas too.

thanks for your response. I do not have a cowling with a blower on my 555deluxe. We did notice the fan blades seem to push air from the hot engine to the radiator rather than pull air from the radiator across the motor. As far as a head gasket leak there is no water in the oil. Are you familiar with any sources I can research kubota motors online without having to buy a manual?

 

[skidsteer.ca]

thanks for your response. I do not have a cowling with a blower on my 555deluxe. We did notice the fan blades seem to push air from the hot engine to the radiator rather than pull air from the radiator across the motor. As far as a head gasket leak there is no water in the oil. Are you familiar with any sources I can research kubota motors online without having to buy a manual?

Check the engine temp with a infared guage or try another guage just to be sure yours is not faulty.
That will have a pusher fan and needs a proper shroud. Pushers should be submerged into the shroud so the air flow does not sling off the ends of the blades but is forced through the rad. Without one your wasting 1/2 of the fans airflow.
Ken

 

[Chip S]

Dumb question. You refilled with an anti-freeze mix, right? When you squeeze a radiator hose for a second and then let go, you can feel the coolant refill the hose under pressure? As for compression, start it up and remove the oil filler cap. If you feel pressure coming out, your rings are shot and it's time for a rebuild. If after all that work it's still overheating, could very well be the temp sender.

 

[kansas555]

Dumb question. You refilled with an anti-freeze mix, right? When you squeeze a radiator hose for a second and then let go, you can feel the coolant refill the hose under pressure? As for compression, start it up and remove the oil filler cap. If you feel pressure coming out, your rings are shot and it's time for a rebuild. If after all that work it's still overheating, could very well be the temp sender.

Thanks for all the help on here. I did resolve part of the problem. The fan is a pusher and the mechanic who replaced the water pump impellor for me did not replace the shroud because it was kind of boogered up.thanks ken I may still have a compression issue because it is hard to start and I have been using starting fluid on it. I read somewhere that this is a big no-no for the kubota engines.

 

[skidsteer.ca]

Thanks for all the help on here. I did resolve part of the problem. The fan is a pusher and the mechanic who replaced the water pump impellor for me did not replace the shroud because it was kind of boogered up.thanks ken I may still have a compression issue because it is hard to start and I have been using starting fluid on it. I read somewhere that this is a big no-no for the kubota engines.

Glow plugs being used with starter fluid is a huge no no. One or the other.
Either can also be vary hard on a engine, if you use too much (ie broken pistons) the engine will fire before the piston comes to the top dead center and stop the starter dead in its tracks because it is firing against the rotation of the motor. Fixing your glow plugs is a better option for sure.
Air flow = cooling, fix the shroud, you need it
Ken

 

[sandhills-elect]

Glow plugs being used with starter fluid is a huge no no. One or the other.
Either can also be vary hard on a engine, if you use too much (ie broken pistons) the engine will fire before the piston comes to the top dead center and stop the starter dead in its tracks because it is firing against the rotation of the motor. Fixing your glow plugs is a better option for sure.
Air flow = cooling, fix the shroud, you need it
Ken

This might be a dumb question too but are your glow plugs working right? I think you can take the wire loose and check with a test light, that is how i do it. If you have decent compression with glow plugs it should start right up. Make sure you don't have heavy oil in real cold weather. Does it use oil, or smoke white are things to look for. Change fuel filters and makes sure you have good fuel pressure. Good luck Brent.

 

[sandhills-elect]

This might be a dumb question too but are your glow plugs working right? I think you can take the wire loose and check with a test light, that is how i do it. If you have decent compression with glow plugs it should start right up. Make sure you don't have heavy oil in real cold weather. Does it use oil, or smoke white are things to look for. Change fuel filters and makes sure you have good fuel pressure. Good luck Brent.

something else make sure belt is tight on the fan, and make sure blades are not caked with dust and such may help also, not to be blunt but the fan blade is on the right way too, i don't know if they can be backwards. Make sure cooler is clean too, that will stop your air too. Good luck Brent.

 

[Earthwerks Unlimited]

something else make sure belt is tight on the fan, and make sure blades are not caked with dust and such may help also, not to be blunt but the fan blade is on the right way too, i don't know if they can be backwards. Make sure cooler is clean too, that will stop your air too. Good luck Brent.

It's not going to matter if it's pulling or pushing air---providing the fan is designed to do that.
BTW, my New Holland LS185.b doesn't have a shroud--in fact the fan sits about 4" from the radiator. It puts out so much air that I back the machine up to fire piles to make them burn quicker.
I suspect it's still the radiator. I've never heard of rodding before. But if it's what I think it is, you need to recore it and get it overwith. My 555 with a Perkins was overheating and that's what I had to do. I had them add another core section just to be sure. It cost $550 8 yaers ago.
Also, the poor compression and not starting leads me to believe it's time for new rings or rebuild. My 555 had a broken ring. It wasn't hard to start but did smoke until it warmed up. Eventually it consumed about a quart of oil per hour and spit oil from the muffler.

 

[kansas555]

It's not going to matter if it's pulling or pushing air---providing the fan is designed to do that.
BTW, my New Holland LS185.b doesn't have a shroud--in fact the fan sits about 4" from the radiator. It puts out so much air that I back the machine up to fire piles to make them burn quicker.
I suspect it's still the radiator. I've never heard of rodding before. But if it's what I think it is, you need to recore it and get it overwith. My 555 with a Perkins was overheating and that's what I had to do. I had them add another core section just to be sure. It cost $550 8 yaers ago.
Also, the poor compression and not starting leads me to believe it's time for new rings or rebuild. My 555 had a broken ring. It wasn't hard to start but did smoke until it warmed up. Eventually it consumed about a quart of oil per hour and spit oil from the muffler.

I wanted to let you guys know what I found on my overheating problem. I took it to another shop out here in rural kansas. The thremostat had been replaced with one from a local auto parts place. The new shop ordered one from new holland and this one made all the difference. They said the old one did not allow the coolant to stay in the radiator long enough to cool down. I thought a thremostat was a pretty generic thing. I hope this might help someone else and thanks for all the help on here.