Truck is overheating

Hello,

Those system bleed pretty easy you just fill and go. Here is a video that will help you see what to do.

https://youtu.be/GSE9skKnOgY

I think you may a stuck thermostat. This guide will give you an idea on how to change it,

https://www.2carpros.com/articles/replace-thermostat

This guide can help as well

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down these guides and report back.

That is usually the opposite of what happens. Have you had to add coolant? Have you checked the oil to make sure the coolant isn't making its way to it? Also, how does it run other than the overheating? Finally, how old is the lower radiator hose? I have actually seen them collapse when the engine reves. At highway speed, the engine is reving and it could happen.

Let me know.
Joe

PS: Are you sure you replaced the t-stat facing the right direction?

That could be the problem. You can try to flush it yourself. If that doesn't clean it out well enough, have it rodded out. They will actually place the radiator in an acidic solution that will clean it out. There is a place near me that does all my radiator work. WHen I get it back, it is cleaned, repainted, checked for leaks, and looks and works like new. And all of this is done for around 40 dollars.

THat would be a good idea to try. If the hoses are old, it would be a good time to replace them too.

Let me know what you find.

Joe

Did the MIL indicator came up?

When was a full service last dne?

Is this an automatic or manual transmission?

When climbing hills, what were the engine rpm?

On level roads, how fast can you go?

Was anything done prior to this occurring?

Have coolant system pressure checked for a head gasket leak

Might be a bad radiator cap but also for d recommends turning on heater and having hot air blow from center vents and top hose should be hot to touch. I really can't think of anything else if been pressure checked and ok. Only other thing I've seen is when dex cool and regular green antifreeze was mixed cause caking around cylinder walls so it wouldn't cool. Also unless there is dome type of air flow problem at speed. I kinda doubt the last thing though the caking.

Have you ever had the radiator flushed? Also, check both upper and lower radiator hoses to make sure they are not sucking shut restricting the coolant.

Let me know about those things.

Joe

Have the coolant system pressure tested and the cylinder's compression tested you may have a blockage in the system?

You will need to take it to a shop i'm afraid, it require's a pressure test tool. Which you can buy from most autoparts stores if you want to do it yourself?