2004 Z71 overheats while idling

[CKentC]

I’ve got an 04 z71 that overheats while idling in the hot Texas summer.  Has suspension and 3” body lift, which has separated the radiator 3” from fan shroud (thinking this could be causing airflow issue?). Does not get over 195-205 when going down the road, towing, etc.  I’ve seen old threads on this, but most folks seem to just throw parts at them (fan clutch, thermostat, water pump, efans). Yet I can’t find where anyone has found a reliable fix. Almost like they just live with it. Is this a GM engineering flaw, like the 2-3 gear clunk I also have? 

[txab]

You've modified what GM engineered

 

You've got to get the airflow across/through all the radiator, otherwise your cooling capacity is being wasted. Modify all the shroud and baffles to insure all the air going through the grill is passing through all the radiator. If you've got a 3"gap between the backside of the radiator and fan shroud, you're just sucking air through that gap which is sizable

 

I have no issues with mine in Texas heat at idle for extended period of times.

 

Arriving at parking spot. Clutch fan

 

 

 

 

 

After 40 minutes parked and running, with AC on and very comfortable.

 

 

Edited August 30, 2020 by txab