I have a new radiator, new rad cap and new coolant and thermostat.
I just had a new injection pump installed so I'm not running anything turned in.
My truck will overheat in less than 30 seconds under load and medium power, say 75% on the go pedal. This at 0 degrees C
I am planning to install a hood cowl and cut the hood to allow more air flow through the radiator and out the cowl. Once the weather warms up I'm taking out the thermostat to allow more coolant flow.
Since I never use my air conditioner I want to remove the condenser and take off the pump. This will give me more surface area for the radiator behind the inter cooler.
Do I need a different belt for the pulleys??
Anyone else done this??
Any other suggestions for cooling this beast down??
This is the one huge weak link in my truck.
Thanks!!

 

It sounds like something more fundamental like plugged radiator or water pump not working. Is the thermostat opening? There should be about equal firmness when you squeeze the upper and lower hoses, after she is hot. If not. it is a plugged radiator or bad thermostat. Is 1 hose cooler than the other? Also, how is that free pump working?..Mark

 

Sorry, just saw the new radiator. I have seen bad thermostats out of the box. There may be an air dam in the system. I know one thing, my truck never runs hot, and I live just this side of the equator...Mark

 

Today new parts are put in a box even if it is wrong.

 

Be sure that when you install the thermostat, that the little hole with the "Wiggle-Wire" is up. Doing so ensures any air caught in the head at the thermostat is vented to the radiator and ultimately the overflow reservoir. That way, the thermostatic element will be submerged in engine coolant allowing it to work correctly.

 

*Off topic*

Free pump is working perfect. Truck runs just awesome. IT'S KILLING ME NOT BEING ABLE TO TICKLE IT THO'. Stupid warranty

How do you get rid of an air dam?????

Old thermostat did the same trick as the new one.

 

Fan clutch? Sure that the engine's full of water?

Unless the AC condenser got got plugged full of dirt or bugs its not worth the trouble to pull it out. likewise with cutting a hole in the hood. You've got other problems.

Why'd you think you needed a new radiator, et al, anyway?

 

Brand new fan clutch.
Fluids topped up.
AC cond. is trashed. The fins are so beat I can't spray water through them to clean it.
Old rad started leaking. It was a custom 4 core to boot.

I think I'm going to try flushing the block first and see just what comes out of it.

 

I agree with all the above. Your problem is something very basic. Your fix will not be a mod like ram-air or a different belt. These engines can run at full load all day in Death Valley and not overheat. Yours overheating at 3/4 throttle @ 0*C is a sure sign there is something major going on with your cooling system.

 

My engine been a chronic overheating poopoo-head ever since I've owned it.
I have replaced all parts and still this exists.
From a standstill with WOT I can bring it right up to 200 degrees till I max out on speed.
You used "basic and major" in the same paragraph.
I'd never drive it down south in hot weather.
I have been through this system many times and visually can see nothing wrong with it.
Also have a new fan and fixed the shroud the best I could.

 

Basic means fundamental.

Major means important.

For example, a (possibly failing) water pump is a fundamental part of your cooling system, and it is also very important in the cooling process.

 

I'm with ya.

 

I had to leave the cap off over night for a couple of nights to get the air out. What radiator did you get? When I went to get mine recored, the guy, who I have used for years, told me that the water ways on the stock radiator were larger volume than his basic core material. He advised on a new radiator, which he did not sell. This made me believe him. The basics would include restricted air flow through radiator, plugged up water galleys or block full of crap. Has the head ever been off? Maybe someone put a gasket in backwards. I don't know about cummins, but this is possible on many engines that I have worked on...Mark

 

It's a new factory rad.
We just did the head gasket in Jan.
I've replaced everything and the same problem is still there.

 

If you have replaced all the cooling system parts, though, it sounds like you may have a blockage in the block. I would build a contraption like the one that Jim Lane built that connects a garden hose to the top of your block. Then crank up the hose, and watch the water coming out of the block at the lower coolant hose outlet. You should be able to tell whether or not the water is exiting the block at a normal garden hose rate-of-flow.