78 Chevy Luv Overheating Issues

[2500sierra]

Not completely sure it this is the correct place to post this but here goes.

 

I bought 2 chevy luvs instead of a s10 i just think they are pretty cool and classic.

 

everything looks very clean in the cooling system, i have removed the thermostat thinking it may be stuck shut.

 

It takes a while but it gets HOT like 230 degrees hot i dunno how much more it can take being aluminum head on cast iron block.

 

So i have two luvs i took the water pump off the parts one and my good one both look about the same and in good condition, so i dont really know what to check next, all i can figure is head gasket issue?

 

any ideas of things to check are appreciated.

 

Hopefully there are some members on here that still remember these little things.

[jro909]

is it the right thermo? i'm not sure what the operating temp is for those...have you tryed checking the flow of the coolant? i mean there may be a small blockage, the fan work?

[Shaners]

Are you sure the gage is accurate?

[ChevyDogger]

The Lus is really just a re-badged ISUZU, You should try posting your problem over HERE. These guys know there late model ISUZU's well.