Basics all covered.. Checked with mechanical gauge--also used thermometer in filler neck--shows 230-240 degrees. Does not boil coolant and no excessive pressure in system.
Thermostat replaced--water pump--fan Ok--Radiator replaced--
Head removed and checked by very reputable shop, no cracks and resurfaced.
No oil in coolant and no coolant in oil.
Truck runs good and has lots of power, does alright untill you work it hard like loading a flat bed trailer.
Has a good strong airflow out of counter weight, but air is very hot, heats up counterweight to the point, you can't touch it.
This truck has been at the same place for several years and has not had any problems. Over heat condition came up recently.
Even though it runs good, could the injection timimig causing this?
Any Cat guys have any ideas, nothing that has been done has helped.
Showing items 1 - 4 of 4 results.
The water pump was replaced.
I have been thinking about the scale build up in the bottom of water jacket, I have seen this before, but had forgotten.
The water in this area is tough on cooling systems.
The exhaust being restricted, very possible, will pass this info along, appreciate the feed back! Will let you know what they find
did you check for a plugged exhaust and changed the airfilter?
did you replace or pull the water pump?
how was the impeller?
wow looks like you checked it all
hows the motor mounts
some mitsu/cats when the mounts go bad the crank pulley drags on the frame maybe this is slowing the fan down just enough to raise the temp
vapor lock at the pump?
crack the bypass plug see if you get air
scale deposits in the block
clean and flush
a 1/4 inch of scale is equal to adding two inches of steel as far as heat dissipation
but i think the machine shop woulda tipped you off if they seen anything
i have found once or twice after some one changed something used RVT gasket maker and used way too much
one time on an LPG whos regulator kept freezing over
i found RTV from a previous repair had come loose in the water passages and lodged itself in the bypass fitting blocking water flow
just a few ideas hope it helps
i dont know how you could get bad timing without seeing other issues if no has touched the pump to date
after you remove it you need to flow time it
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