Ok.
I am in the process of documenting my brother 1982 pace car. I noticed that it appears to have a date code stamped on the center rivet.
Is this indeed a date code?
If so when did they stop doing that as my 1986 doesnt have a date code. It is a different cap. My 1986 looks like it could have had 1 but not sure.
Are you guys seeing this on your caps?

1982 pace car

1986 LB9 Iroc-z

 

I'll have to check mine. It's on the lift so it needs to wait until tomorrow, though.

 

thanks

 

Made In England Caps Have No Stamping.

 

GT4373 What Year car is this off of?

 

1984

 

1990 Made in England cap - no stamp

 

Scott did you get a change to look at the 1 on your pace car? Was it made in mexico and does it have the stamping I am thinking is a date code.

 

I always thought that number was the pressure rating in metric or some other non-standard rating

 

Is that first picture an original radiator cap? It looks like a Stant. Wouldn't GM have used an AC?

 

Here is my 92 cap. I am guessing it is aftermarket.

 

its not factory. its what I run on mine, wasnt sure if I should trust the 30 year old radiator cap that sits and is admired on my desk at home.