[Joe White]

Update number…. Who knows… anyway decided to do some more upgrades and things. I flushed out the smaller radiator I have. Using it with my ~3700 cfm dual fans. Overheats when going over 2300rpm. (Slow overheat). Doesn’t matter the mph. Upgraded high flow thermostat, and thermostat housing. New top radiator hose.

I took the hood off today with no change.

Gonna try to take the front grill off and run without it and see if that does anything.

I might be out of options.

 

[bk2life]

I might be out of options.

i wish we were closer, id love to figure out what is going on with your truck. Im starting to think something is fishy with the engine. Like wrong headgaskets or something.
Removing the hood should've had a huge impact as it creates a very negative area and literally pulls all the air out of the engine compartment up and over the car.
with it still over heating that means either your rad is internally plugged, or, you need to pull the engine and do a tear down and inspection, as something isn't right.

 

[Joe White]

My thinking is something like that, either head gasket or intake gaskets, although im not sure how much of an impact the waterports through the intake cause. There is differnt heads so it is entirely possible there is the wrong headgaskets

 

[Joe White]

Update: I got one of the autozone head gasket test kits. Did the test and there appears to be no exhaust gas in the cooling system. Doesnt mean the head gaskets are perfect, but defiantly nothing telling me there are bad. I do need to check the sparkplugs to make sure of nothing fishy, no white smoke out of the tailpipe but it might be missing sometimes at idle, hard to tell with the cam.

One thing I did do was take the front grill off, now at the time I had the hood and front grill off. The hood off seemed to do little to no change, taking the front grill off might've helped, but it might've been just coincidence, as I didn't drive as far as I did to test without the hood. I wouldn't think that the grill on it would really restrict it that much, looking at the corvettes it seems unlikely that could be a problem.

 

[oldeerslayer]

Bet GM engineers put a lot more time and money into R&D on the Corvette cooling system than they did on the el cheapo pickups. If S trucks overheated it wouldn't get all the media attention a Vette overheating issue would.
Plus you aren't running a stock setup by any means. Could probably make a Corvette overheat with a few mods, too.

 

[bk2life]

there appears to be no exhaust gas in the cooling system.

you dont have a 'blown' head gasket, you probably have the wrong head gasket. meaning, its blocking/restricting water flow. Every test will be 100% perfect, thats not the issue, you physically will have to remove the heads to see if the gasket is on backwards, or you have the wrong style for your head/block combo

 

[Joe White]

you dont have a 'blown' head gasket, you probably have the wrong head gasket. meaning, its blocking/restricting water flow. Every test will be 100% perfect, thats not the issue, you physically will have to remove the heads to see if the gasket is on backwards, or you have the wrong style for your head/block combo

It'll be late December before I'll have time and a place to work on it. But if I'm going to be taking the heads off I might as well replace the head gaskets anyway.

I'd be tempted to just LS swap the truck anyway, but even with a junkyard LS there's a whole other cost of hoping the transmission would work, and new fuel system probably. Plus it already runs so kinda sucks to do that.