I have a 1999 chevy blazer v6 overheating badly.I put a new radiator,clutch fan,thermostat,hoses and water pump.I am up in arms cuz it still overheats.My local shop has checked for head gasket issuies and have ruled this out ,there is not any oil in the coolant and the radiator cap is new as well.The only thing we have not done is burp the system.
Is there anything you guys can think of besides putting an electric fan in front of the radiator?

 

That's the thing you need to do now.

 

Just purged and still got up to 260 deg's

 

Does the parts you got work right? Also does you radiator fan kick on while the car is running?

 

Yes,and yes.At idle it's fine ,but when you are driving it starts to heat up.

 

check for intake manifold leak

 

That can make it run hot?wouldn't it leak somewhere?
We took it back to the shop that put the water pump on and they think its a head gasket leak ,but they dye checked it twice and said head gasket is fine

 

Is the system building up high pressure. My 95 was and turned out to be a cracked head. Fixed the heads and cool as can be now.

Is your timing advancing as it should at higher RPM's?

 

Ok,new stant 16lb cap,flushed 3 times ,burped the radiator ,new rad,new water pump and thermostat.I even put 2 12'' electric fans that come on at 180 deg and I am still over heating.
Can anyone help!!!!!!!!

 

Haas anybody verified the operation of the engine coolant temperature (ECT) sensor?