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Wayne
Wayne, Journeyman
Category: Construction and Road Equipment
Satisfied Customers: 8438
Experience:  worked on many road graders, Bull dozers , skid steers, Rollers
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I have a komatsu engine belonging to a 450LC-8 and the

Customer Question

I have a komatsu engine belonging to a 450LC-8 and the radiator is cold at the bottom and at the top it is very hot. We have replaced the water pump and also the thermostat. What do you think the problem is
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Submitted: 8 months ago.
Category: Construction and Road Equipment
Expert:  Wayne replied 8 months ago.

Hi I'm Wayne

I will help you with this

this is a indication that the radiator is plugged

I suggest t remove it and have it cleaned

I hope this helped you

Hi if this helped you

Please rate my answer 3 or more stars

If you need more info, use request button

Not Poor/Bad service

Wayne

Customer: replied 8 months ago.
WE have looked at this and the radiator seems ok! But we are going to try again! If you follow the pipes at the bottom of radiator they are cold the full distance to the water pump and the line from the top of the radiator to the water pump is running very hot!
Expert:  Wayne replied 8 months ago.

Thank you

I still suggest you have plugged radiator

the top is always hotter the bottom

but not cold , that shows radiator fault

Hi if this helped you

Please rate my answer 3 or more stars

If you need more info, use request button

Not Poor/Bad service

Wayne

Customer: replied 8 months ago.
Thanks Wayne we will wash out the radiator and I will come back once this is completeRegardsMartin
Expert:  Wayne replied 8 months ago.

Hi Martin

you can not was h out

needs to be pressure wash from bottom to top

reverse flow, at a radiator shop

Customer: replied 8 months ago.
WayneThankyou for your advice! What is confusing us is that the machine had form a leak at the water pump, we put a new water pump on the machine and now this problem has occurred. If the hose is hot from the water pump to the radiator at the top would it be possible for the water pump not to be circulating the water?RegardsMartin
Expert:  Wayne replied 8 months ago.

Hi

Yes that is possible , but I was not aware it started after pump

replace , could be wrong pump, turbine on pump may be slipping on the shaft

pump running in reverse, belt crossed

just some items to check

Customer: replied 8 months ago.
WayneWe are going to check the radiator, then the water pump next.I will keep you informed of progressRegardsmartin
Expert:  Wayne replied 8 months ago.

Thank you

Expert:  Wayne replied 8 months ago.

HI

Just a follow up

how is the issue doing

did my answer help you

let me know,Please

Wayne

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