Engine problem

No, Cat Brakesaver is a hydraulic retarder mounted between engine and transmission that runs off engine oil. If its sticking on slightly it can cause the engine oil to heat up a lot, which would cause the coolant and oil temperatures to heat up.

 

When was the last time you added coolant (before the radiator was replaced)?

If your coolant mix isn't right (more glycol then water) it will cause you to over heat. People have cracked cylinder heads (on cars) by using the concentrated coolant (100% glycol) and not mixing it with water because they thought it was all the same.

My truck was staying at 200* steady a few months ago. Turned out to be a stuck thermostat. Luckily I only have one for the coolant and one for the oil instead of two for coolant and one for the oil like some engines.

Hope you figure it out because that engine fan constantly running is putting a hurting on your fuel milage.

 

I would get some thermostats back in it ASAP.

 

Oil temp also high?

Usually coolant gets hot first then the engine oil starts to warm up in sympathy with the coolant overheat. Not always.

Take a look at your radiator cap. See if it holds the required pressure. Ive had shops, plural rebuild the guts of the entire cooling system and forget the cap. My old ford had a bad cap causing me to do the same thing replacing everything related to cooling plus a huge radiator.

Im not going to talk about today's engines with the exhaust fluid, emissions and so forth. You are getting hot under a load anyway with all that crap. No wonder you are getting warm.

It's summer. This is the last part of the burning time for the year prior to fall mud and tornadoes for us. Did you run in a hot area maybe? Pull a few mountains? Is the fluid in that truck 50/50 coolant to water?

Just my thoughts. Cooling a hot truck that cannot stay cool and run is a pest and beating on it, throwing money at it and so forth will not help.

 

CAT's brakesaver generates too much heat in a area already full of heat. Get rid of it.

use a proper jacobs brake, retard at your exhaust valves instead. (Im using retard as in slow down or keep closed longer to impose a slow down on the entire engine and thus braking the rig. Not a insult...) This website censors too much. Retarder. There that should work.

 

I should have reworded that. Ive seen so many people throw money at my truck cooling problems over the years. Its not really my truck. But when it does get sick and customers asking bossman to fire me for being late... due to the cooling issue that is persistant as mine was you get to where people think there is something wrong with me in the head. It's hard to explain.

I try to be as plain but there is also something behind the things I might say. This is one of them. I had a episode where the FLD got hot over and over and over. Shops in three states in turn rebuilt my engine, dynoed etc The full tour at like 2000 dollars a pop. 6 weeks into the story that was not going well, my bossman the owner of the whole thing said off hand this is not a ternimation deal, we WILL fix that #### thing.

I got worried then. Still am.

What it was for me that particular time, everyone kept ignoring the corroded probe in the engine block where the coolant pipe is. It's crazy.They will throw down half the block and it's guts onto the floor but refuse to replace the probe. It's hard to explain. Even today I still don't understand. And that is the story on my end as I saw it.