Cant win with this issue.

[mark23svt]

Hey guys I’ve been chasing this overheating issue for a long time. I’ll start off by saying I checked the thermostat and it works. I replaced fan just in case, I burped the system properly(reason I know is because car sometimes drives normal and doesn’t pass 190/200 while being out). Some days I can drive it all over, then some days out of nowhere it will over heat wanting to pass 230. One day I took car to gym ran it hard felt great and didn’t pass 200. Same day going home left it sitting in bank for couple of min and temp was at 220 and climbing. Only reason I noticed before I checked the temp was that I can hear my belt squeal I’m guessing from coolant spill. Then two days later I burped the system just in case, everything worked again. But yesterday same thing it overheated on my way home. This is so frustrating. My white cobra I can leave sitting at idle and doesn’t overheat. Any advice or help plz. Oh and I checked the 2 fuses they were good.

 

[Sfcjerryharris]

Have you checked for head gasket leak, or somewhere antifreeze is not moving while at idle

Sent from my SM-G955U using the svtperformance.com mobile app

 

[DSG2003Mach1]

hate to say it but when my lightning would randomly over heat (and then cool back down super fast) it was a blown head gasket

unless yours is only doing at idle in which case Id still be looking at your cooling fan, something could be up a fuse/relay for that along with possibly the CCRM

 

[mark23svt]

Dam that sucks if it’s head gasket. And no it does it randomly sometimes I can leave it idle for a long time nothing will happen. Then I can drive it and it will over heat. At times I can go 2/3 days of using her without any issue then out of nowhere. And when I’m driving I know when it’s going to overheat. I can feel the A/C not cold anymore. One day was weird I was driving and it started to overheat, all of a sudden when I was looking for a place to park by itself it went back down to 200.

 

[mark23svt]

But most of the time it won’t cool back down so I have to let it cool then limp it back home. Then just a simple burp and it will work for a day or so maybe a week.

 

[mark23svt]

For example right now I let her idle in garage for 20 min and she stayed at 180.

 

[WHITESTRIPES]

Are you losing any coolant?

 

[mark23svt]

I NEver see any spill but I have the aluminum expansion tank and I can see dry residue that dirties it. And I can hear the squeal as if some is coming out. But I guess not a lot because I’ve never seen any on the floor once I park at home.

 

[mark23svt]

But only when it heats up on the days it doesn’t I don’t see or hear anything

 

[WHITESTRIPES]

Is the coolant level low after every drive? Or does it need to be topped off all the time?

 

[mark23svt]

Honestly i only check the days it over heats. And yes it does everytime it overheats I need to add some. On the days it doesn’t over heat I don’t check it.

 

[mark23svt]

But I just thought of something everytime I burp the system it works for a while since I fill her up. Then a day or so passes and she might overheat now I think due to loss of coolant.

 

[mark23svt]

So how can I tell if I have a bad headgasket

 

[mark23svt]

Also before I go so far as head gasket I have a new water pump I want to try as well as a new resovoir, cap and crossover plug. Just incase.

 

[BLOWN9646]

Leakdown test

 

[ashleyroachclip]

Buy a kit , that checks for exhaust gasses in the coolant .
Very simple to use , it is a dye that goes into a bottle like devise , that you sinply put into the resivour , and it changes color if there is exhaust gasses in the coolant .
Takes 5 minutes tops.
You are either losing coolant , or sucking air into the system .

 

[mark23svt]

OK cool can I get that at autozone?

 

[03sonicblu]

curious of test kit too...something good to have around for these cars