RapidC84B

Possibly have a pinhole leak in the radiator... will know more once I take it out to investigate might as well upgrade.

1. What's the forum consensus on the best aftermarket primary radiator?

2. Will GM honor my engine warranty with an aftermarket radiator in there? I know the whole Moss-Magnusson thing... but will they give me grief if I spin a bearing or something stupid?

Bill Dearborn

I doubt it. Most of the time that type of thing is overlooked if the failure wasn't due to overheating.

Bill

RapidC84B

I wasn't asking if GM would warranty my OEM radiator, but will they warranty my engine with an aftermarket one?

Thomasmoto

Shouldn't be a concern with future warranty issues. DeWitt's is the route I took and seems to be a general consensus choice.

RapidC84B

Is it truly direct fit, or do you have to trim the fan shroud or anything like with the C5? I had one in one of my C5s and it was a quality product.

rikhek

Tool Hoarder,

I'm curious why you're considering aftermarket as a replacement? Are they less expensive than OEM. Asking as I've not heard of any of the aftermarket choices improving cooling capability?

Rick

RapidC84B

Just bought the car and plan on doing a lot of trackdays. Sold my racecar a couple years ago and getting back into it but to a lesser degree... trackdays instead of racing. My car is a Z51, but I posted in here as more Z06 owners have done the radiator and the Z51 and Z06 use the same part.

rikhek

Got it. If you search you'll see MANY threads from people who bought aftermarket radiators and none of them proved better than OEM.

Thomasmoto

I can't say for sure, I had the job done at a dealership, but I think it was a direct fit. The tech there keeps me well informed if it was anything unusual.
The DeWitt's is definitely an improvement on the stock radiator, but still doesn't completely irradicate the issue under high temperatures and aggressive driving on the track.

0Tom@Dewitt

I am not calling you out or starting a fight but that just not true. So far we have made several hundred C7 radiators and our website page has five (5) customer reviews. All of them 5 Stars.

Check the bottom of the page

Yes, some people on the forum continue to report issues when pushing the car to extreme racing conditions but they all say the our radiator recovered quicker and heated up slower. So I feel that is "proven to be better than OEM.

Thomasmoto

Yes, it absolutely is.
At my last event on my last 20 min session I crossed the stripe at 244 degrees and had my best lap of the day.