2014 Z51 Overheat
Thread Starter
Instructor
Joined: Jun 2013
Posts: 132
Likes: 1
From: Lafayette LA
2014 Z51 Overheat
I have a 2014 Z51 and was coming home from the Bash at the museum on Sunday. Made two stops for gas and lunch. Got 3 miles from my exit and hit construction traffic, stop and go, turned off A/C to try and assist cooling by running heater, no help. Pulled over to parking lot, was starting to lose oil pressure, cut off car, opened the hood, fan not running. Tried to restart, acted like a low battery, difficult to turn over. Let the car sit for a while, engine started with a check engine light. Fan still did not come on until I turned on A/C again. Car drove home ok.
Next morning, on Monday, I drive car to dealer, no check engine light. Dealer calls me today for more info because.............you guessed it, failure to replicate.
Has happened to me at least two other times. Once I had a Master GM Tech connect a device to the car and sent command to the fan to run at 100% and fan responded, so we know that the does run when commanded, Just have to find out why the car is not telling the fan to run.
Next morning, on Monday, I drive car to dealer, no check engine light. Dealer calls me today for more info because.............you guessed it, failure to replicate.
Has happened to me at least two other times. Once I had a Master GM Tech connect a device to the car and sent command to the fan to run at 100% and fan responded, so we know that the does run when commanded, Just have to find out why the car is not telling the fan to run.
Racer
Joined: May 2014
Posts: 310
Likes: 36
goodluck 
The same thing happened to me. Took it to the dealership about 4 times with unable to replicate. If it ever gets above 220 I just turn off the car and turn it back on, and the fans seem to kick in.
Update: Fix was installing new thermostat housing, seems like it would get stuck or something. have not had this issue since I replaced the thermostat and housing
The same thing happened to me. Took it to the dealership about 4 times with unable to replicate. If it ever gets above 220 I just turn off the car and turn it back on, and the fans seem to kick in.
Update: Fix was installing new thermostat housing, seems like it would get stuck or something. have not had this issue since I replaced the thermostat and housing
Last edited by Greenkirby21; May 21, 2024 at 03:08 PM.
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
ttt
My 2014 did the same thing it was the relay on mine are something in the fan set up one of the two. But I put in a Dewitts rad the big one then a 160 from LMR. Then I did a set of 3D fan set up on the car it now has never done it again. But what ever it was on my car the fans would not come on at all on the few times that it did do it.... Robert
Instructor
Joined: Mar 2007
Posts: 180
Likes: 15
From: Memphis tn
I have a 2014 Z51 and was coming home from the Bash at the museum on Sunday. Made two stops for gas and lunch. Got 3 miles from my exit and hit construction traffic, stop and go, turned off A/C to try and assist cooling by running heater, no help. Pulled over to parking lot, was starting to lose oil pressure, cut off car, opened the hood, fan not running. Tried to restart, acted like a low battery, difficult to turn over. Let the car sit for a while, engine started with a check engine light. Fan still did not come on until I turned on A/C again. Car drove home ok.
Next morning, on Monday, I drive car to dealer, no check engine light. Dealer calls me today for more info because.............you guessed it, failure to replicate.
Has happened to me at least two other times. Once I had a Master GM Tech connect a device to the car and sent command to the fan to run at 100% and fan responded, so we know that the does run when commanded, Just have to find out why the car is not telling the fan to run.
Next morning, on Monday, I drive car to dealer, no check engine light. Dealer calls me today for more info because.............you guessed it, failure to replicate.
Has happened to me at least two other times. Once I had a Master GM Tech connect a device to the car and sent command to the fan to run at 100% and fan responded, so we know that the does run when commanded, Just have to find out why the car is not telling the fan to run.
