Hirohawa

Brutal. Sorry to hear.

AZDoug

You could do a roof oil cooler like this:



Or like this:



Just a suggestion, We promise we won't laugh.

Doug

RC000E

So basically, everyone is going to "fix" their overheating by removing all the aerodynamic pieces that manage airflow through the cores and back out of the car...ok then...

If all else fails, you can remove the hood next...that'll help.

Snorman

I think an insulated, somewhat snap-on,form fit cover for the PS unit would probably solve it. This would have a heat reflective barrier and weigh probably a few ounces. Think similar to starter shields.
S.

TARANTULA

What about something like this?
http://www.thermalprotectioninc.com/...ive_Films.html

Snorman

Maybe.
More like this IMO...
https://www.designengineering.com/ca...s/versa-shield

S.

Greg Quillen

My temps at Poconos . On the gas both straights

Im going to run at least 75% water and pray lmao

AZDoug

Is the heat coming from the outside, or is the heat generated by the PS motor during heavy useage?

You don't want to lock heat in if it is motor generated.

Doug

Snorman

Not sure, but would suspect it does not help that it is sandwiched between the front of the engine and the radiator with the lower radiator hose 2-fingers away.
S.

corvettemonster

Why should anyone have to research which part to add to cool this dreaded Z06 heating issue?? Hell, I wouldn't put another dime into this car after spending my hard earned money on it. I'd tell GM to buy the car back including tax, title and license fees.

I sure won't be buying a C7 Z06 until all this nonsense bs it fixed BY GM.

I'll stick with my current rides.

firstgear

What is different with the DeWitt radiator over stock? Does it hold more coolant? Does it have more passes? Is the surface area larger?

ChrisN123

End of day update. We drove in "M" all day and had no overheating warnings or power steering failures. Ambient temps ended up being low 80s with a breeze.

In the last session of the day, we saw max oil temps of 303*, but water only hit 255, so no warnings/failures. Still, pretty close to the limit-- even with paddle shifting. Another 5-10* warmer ambient might well have changed the outcome.

For reference, we were working the car pretty hard. The other driver did a 1:54 lap, which is just nutty fast for Thill in a stock production car.

DaveN007

I saw an interesting idea for improving airflow on mikymu's C6. Instead of removing the weather strip completely, he cut sections out leaving sections to support the hood. Looks like a good idea. Also, the plastic piece under the hood vents should probably be removed. That and the hood insulation itself...although that could put paint at risk?

I drove the 5 mile course (first time) on Friday and had zero issues. Upper 70s and shifted manually. Lack of familiarity with 2 miles of the track definitely helped. I was in the 3:40 range. Quick race prepped C-6s were probably in the 3:20s. I was hitting 260s versus their 230s for oil temps.

D not recommended if over 70 degrees and driving well.

mark1107

Yes, yes, and yes!

RedLS6

Just a thought on the power steering - if the variable power assist works the way I think it does (less motor current equates to more steering effort, ie, track mode), it's probably a good idea to make sure the steering effort is always set to track mode at the track. Less motor current means less internal heat generation. I've been in the habit of manually setting my steering to Sport mode on the street, regardless of the mode the car is actually in. I'll have to remember to change this back at the track.

Also, tracks that require more steering, or holding the steering wheel off-center for longer periods, will probably be worse for internal motor heat generation. I don't think we know yet whether the issue is internal power steering heat generation, external heat soak to the PS unit from the hot engine compartment, or some combination of both.

RedLS6

Good info. Driving my manual C5Z a gear higher in "some" spots on the track does untold wonders for oil temperatures. The A8 in our C7Z's can just be ridiculous for holding the revs up. Mine's hitting the track for the first time later this month, will take your advice and go with Manual mode.

firstgear

Do you have numbers for comparison?

Be nice to know if it was 5% more or 30% more.......

ChrisN123

No.

I have prepped the car EXACTLY as specified in the Owners Manual. I SCRUPULOUSLY follow the instructions from the car's warnings and indications. If I experience power train problems before 100K miles, I expect GM to honor my warranty. :-)

I really don't want to have to modify the car and run the risk of being second-guessed in three years if something blows up.

Snorman

Are you guys still seeing 235* tranny temps? In both auto and manual mode?
S.

ChrisN123

226* max when (other systems) overheating in "D" and 217* max tranny temps on fastest laps when paddle shifting.

I'm not sure where trans oil overheats, but I don't think it is the weakest link.