I have a 2002 Trail Blazer, it started over heating. I have a new ratiator, new water pump, new thermostat (yes I checked it and it works), and I've changed the gasket also a new clutch fan and it's still over heating. What else could it be? Please help!

CJ
2002 Trailblazer ltz
4d, 4.2 L

 

Is the radiator still have the shroud around it? Are you sure it actually is overheating?

 

A two inch piece is missing off the top and yes it's actually over heating.

 

Does it overheat with the heater on, turn on heat, see if that stops it from overheating, if it does, need to look into something else. I am making an assumption coolent, level is full, etc.

 

You post new radiator, it is "new"?. What pressure cap is on it?

 

coolant level is full, cap is 15psi (original cap) and yes it overheats with the heat on

 

Turning the he on cools it down a little but if I continued to drive it that way it would overheat. When you see I might have to look into something else what do you suggest?

 

You might have to have the block flushed.

 

I've done that.

 

Is the radiator is new, not salvage ect.? Is it the correct radiator for the vehicle, you can get different size, ex. my lumina has a 5/8", or a 3/4" depth.