Overheating question
Le Mans Master
Joined: Jul 2004
Posts: 5,040
Likes: 939
From: Bonney Lake Washington
Reminds me of an old MGB....
I had the exact same issue with my 15 z51 this passed weekend. Had been driving on the highway for 4 hours then got off to get gas. While sitting at the light I noticed the temps start to climb and the AC not working. Got the the gas station and the coolant temp was 245 and noticed the fan was not running. Let it cool down some, checked the fan connector, spun the fan...all seemed normal. Fan still did not run so I smacked the center of the fan motor with my hand then got back on the highway. Later that day the fan was back to working as expected and the car was not overheating. I think it is a faulty fan motor.
Advanced
Joined: May 2018
Posts: 78
Likes: 15
From: Roseville Ca.
When I had this problem the and brought the car to the dealer and the dealer couldn't find anything mechanical they said it was likely a software problem. By turning off the engine the software resets. Hasn't happened again, but if I'm stuck in traffic and overheating, I'm going to shut it down and restart it. I'll let you know.
Drifting
Joined: Oct 2014
Posts: 1,733
Likes: 403
From: Atlanta, GA
I just had this exact issue yesterday. No mods on mine.
Ive had the over temp before but never to the point of the warning ding ding ding sounding. And coolant bleeding out. Ugh. Was a short drive on I-75 then looping around a parking garage in traffic.
Cooling fans were not running.
Im currently waiting for a flatbed. And of course it’s a holiday weekend.
Ive had the over temp before but never to the point of the warning ding ding ding sounding. And coolant bleeding out. Ugh. Was a short drive on I-75 then looping around a parking garage in traffic.
Cooling fans were not running.
Im currently waiting for a flatbed. And of course it’s a holiday weekend.
Drifting
Joined: Mar 2014
Posts: 1,767
Likes: 338
From: San Diego CA
Originally Posted by JeepSRT+C7
I just had this exact issue yesterday. No mods on mine.
Ive had the over temp before but never to the point of the warning ding ding ding sounding. And coolant bleeding out. Ugh. Was a short drive on I-75 then looping around a parking garage in traffic.
Cooling fans were not running.
Im currently waiting for a flatbed. And of course it’s a holiday weekend.
Ive had the over temp before but never to the point of the warning ding ding ding sounding. And coolant bleeding out. Ugh. Was a short drive on I-75 then looping around a parking garage in traffic.
Cooling fans were not running.
Im currently waiting for a flatbed. And of course it’s a holiday weekend.
Drifting
Joined: Mar 2014
Posts: 1,767
Likes: 338
From: San Diego CA
Originally Posted by JeepSRT+C7
I’m sure it will. But not taking chances. Flatbed almost here.
Theres a reason it did this. Bad relay or something.
Theres a reason it did this. Bad relay or something.
Drifting
Joined: Oct 2014
Posts: 1,733
Likes: 403
From: Atlanta, GA
UGH!! Tow truck never showed...I kept getting "delay" messages from AAA.
Started the car...fan came on. Figured I'd start driving towards the dealership. If it overheated again then I'd stop and call for a tow again.
Of course...it ran just fine. LOL.
Now...since it belched some coolant, should I put more in? Add water? I haven't checked the levels yet. Just got her home for now. My weekend has been beyond crazy with my youngest graduating HS...party...family...etc...and now this.
.....wheres the scotch
Started the car...fan came on. Figured I'd start driving towards the dealership. If it overheated again then I'd stop and call for a tow again.
Of course...it ran just fine. LOL.
Now...since it belched some coolant, should I put more in? Add water? I haven't checked the levels yet. Just got her home for now. My weekend has been beyond crazy with my youngest graduating HS...party...family...etc...and now this.
.....wheres the scotch
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Drifting
Joined: Mar 2014
Posts: 1,767
Likes: 338
From: San Diego CA
Originally Posted by JeepSRT+C7
UGH!! Tow truck never showed...I kept getting "delay" messages from AAA.
Started the car...fan came on. Figured I'd start driving towards the dealership. If it overheated again then I'd stop and call for a tow again.
Of course...it ran just fine. LOL.
Now...since it belched some coolant, should I put more in? Add water? I haven't checked the levels yet. Just got her home for now. My weekend has been beyond crazy with my youngest graduating HS...party...family...etc...and now this.
.....wheres the scotch
Started the car...fan came on. Figured I'd start driving towards the dealership. If it overheated again then I'd stop and call for a tow again.
Of course...it ran just fine. LOL.
Now...since it belched some coolant, should I put more in? Add water? I haven't checked the levels yet. Just got her home for now. My weekend has been beyond crazy with my youngest graduating HS...party...family...etc...and now this.
.....wheres the scotch
Drifting
Joined: Nov 2013
Posts: 1,503
Likes: 600
I just ordered the new Z06 600 watt fan to change out on my new car, it will be here this week.. not taking any chances with overheating and I know for a fact the new fan fixes the overheating.. it takes 6 bolts to change out 
Burning Brakes
Joined: Jan 2002
Posts: 1,240
Likes: 113
From: Scottsdale AZ
Drifting
Joined: Nov 2013
Posts: 1,503
Likes: 600
Sorry I missed your questionPart No.: 23376530
FAN ASM-ENG CLR
https://www.gmpartsgiant.com/parts/g...-23376530.html
https://www.gmperformancemotor.com/parts/23376530.html
Last edited by cowboy casey; May 28, 2019 at 07:54 AM.
Thread Starter
Advanced
Joined: Sep 2013
Posts: 93
Likes: 20
I started this thread a year ago and wanted to update my situation, I now have 9500 miles on my car and 3 road trips in the Texas / NM heat and have not had one problem since upgrading to the ZO6 600-watt Radiator Cooling Fan purchased from Chevys Corvette performance parts (Part# 23376530), I also replaced the Grill to the ZO6 which Chevy says increases front end airflow by 17% over the Z51 factory set up ( Part # W/O Front camera 23387122) . I was told by the dealer originally the Mild 2 Wild switch was causing my issue so they unplugged and said it was fixed, but that was BS after it happened again at which time I made the upgrades and have had no problems since.
Burning Brakes
Joined: Jan 2002
Posts: 1,240
Likes: 113
From: Scottsdale AZ
Sorry I missed your questionPart No.: 23376530
FAN ASM-ENG CLR
https://www.gmpartsgiant.com/parts/g...-23376530.html
https://www.gmperformancemotor.com/parts/23376530.html
Burning Brakes
Joined: Jan 2002
Posts: 1,240
Likes: 113
From: Scottsdale AZ
I started this thread a year ago and wanted to update my situation, I now have 9500 miles on my car and 3 road trips in the Texas / NM heat and have not had one problem since upgrading to the ZO6 600-watt Radiator Cooling Fan purchased from Chevys Corvette performance parts (Part# 23376530), I also replaced the Grill to the ZO6 which Chevy says increases front end airflow by 17% over the Z51 factory set up ( Part # W/O Front camera 23387122) . I was told by the dealer originally the Mild 2 Wild switch was causing my issue so they unplugged and said it was fixed, but that was BS after it happened again at which time I made the upgrades and have had no problems since.
Thread Starter
Advanced
Joined: Sep 2013
Posts: 93
Likes: 20
Sorry, I left out I did reconnect the M2W switch after the up grades and not a problem over heating. I am also running the Borla X Pipe and the MagnaFlow Competition Series Axle-back.
The exhaust was done prior to me doing the cooling upgrades and I figured the dealer would also blame that, but they never said a word about the exhaust being changed.
The exhaust was done prior to me doing the cooling upgrades and I figured the dealer would also blame that, but they never said a word about the exhaust being changed.
