I'll be flushing the cooling system this week, and I'm gathering parts for the job.

I generally replace the radiator cap when I do this kind of thing, and this one is showing some wear on the lower gasket, so time for it to go.

The cap on the car now is a stainless steel unit with RC36 stamped on it, and all the lettering is either stamped or embossed.

But when I look up a radiator cap, I get "AC Delco RC27" - and on Amazon, the RC27 is a black plastic cap with red or orange lettering.

http://www.amazon.com/ACDelco-RC27-R...1&s=automotive

When I go to Eckler's, they list an AC Delco RC27 cap as well, but it's metal with a black sticker on it

http://www.ecklerscorvette.com/corve...1991-1996.html

Eckler's also has a $50 "polished" stainless cap that looks pretty much like the one that's on the car - except I can make out a P/N RC44 and it's a 17 lb cap.

http://www.ecklerscorvette.com/corve...1985-1996.html

The RC44 from Amazon looks the "polished" cap from Eckler's - and for a $40 difference, I could do my own polishing!

http://www.amazon.com/gp/product/com...1995&carId=003

Just for fun, I'm also looking at a Mr. Gasket Thermocap ... which has a temp gage built into it, and I think that would be pretty cool!

http://www.amazon.com/Mr-Gasket-2471...hermocap+2471R

I'm leaning toward the AC Delco RC44 since I don't want a plastic one from Amazon, and the RC27 shown by Eckler has this goofy label on it.

But the Mr. Gasket Thermocap looks like a nice touch - anyone have any experience with it?

Steven

 

Waste of money. If you don't see evidence of leakage, the current cap is fine. Usually you can clean the gasket if it's really bothering you.

 

Read the comments for the RC27 cap on Amazon. They have the wrong picture, it's not a plastic cap. The question is, is it the RC27 that Eckler's has, or is it the all polished one that's on our cars originally.

I'm looking to replace mine too, but I'm not going to spend $50 on a radiator cap.