anyone know when the gas cap went from a dull silver to the gold iridite color? would a early 71 have the gold iridite on it, about what time did the dull slver get replaced, my cars vin is 194371S104764. I would think that it would be a early car? yet it has the gold cap on it not the silver.
-
-
Re: Gas Cap 71
lyndon-----
If any 1971s received the 70 style cap, then it would have been very early ones. As far as I know, none did, but I wouldn't rule out the possibility.
Even if your car had received the 70 style cap, it could very well have been replaced with the 71-74 style somewhere along the way. The 70 style cap, GM #3974743, was discontinued from SERVICE in 1973 and replaced, for SERVICE, by the 71-74 style cap, GM #3994339.
The 70 style cap has a "scalloped" perimeter and silver sinc finish (like 63-69 style caps), but is stamped "sealed" or "non-vented" (I forget which). The 71-74 style cap, GM #3994339, has a completely round perimeter, has a dichromate (gold) overplate over the zinc, and is stamped "sealed".
The 70 style cap is not very easy to come by.In Appreciation of John Hinckley -
Re: Gas Cap 71
Some 1971s got the 1970 style cap with a plastic label stating "caution open slowly." I don't have the TIM&JG with me at the moment, but there are drawings of all three 1970-1972 style caps in there, and approximate break points for the various styles. At least the break points we were aware of a decade ago.
That manual may be long on the tooth, but it is still a great source of information, even if I do say so myself. Of course it costs a little more than asking questions on this board does.TerryComment
-
Re: Gas Cap 71
That's exactly the style I have. Vin # 15065, Apr 20 build date.Comment
-
Re: Gas Cap 71
My 71, Dec 70 serial no. 3932, has the 70 style with the red plastic decal. I did buy the ugly 71-74 replacement cap and use the other one for judging.
ChasmanComment
-
Re: Gas Cap 71
My 70's original cap does not have the red plastic decal, never has. Just put gas in it two days ago, the original cap still holds pressure in the tank. Built July 8,1970, purchased August 18,1970.Comment
Comment