1967 Big Block Fan Shroud

[Enzo C.]

I need some clarification
Was the original big block fan shroud made by General Tire? Or was it a over the counter part
There were part numbers on the left,Right and top pieces
There was DS stamps present on these parts
The AIMS shows part numbers
I have been told that there should be no part numbers present
Some pictures and explanation would be appreciated
Thanks

[Joe L.]

Re: 1967 Big Block Fan Shroud

I need some clarification
Was the original big block fan shroud made by General Tire? Or was it a over the counter part
There were part numbers on the left,Right and top pieces
There was DS stamps present on these parts
The AIMS shows part numbers
I have been told that there should be no part numbers present
Some pictures and explanation would be appreciated
Thanks

Enzo-------


With the GM part number on it you are virtually assured this is a GM piece. The aftermarket cannot legally do that except through the GM Restoration Parts Program and this piece looks like it existed way before that program.

General Tire made many components for GM at that time.

[Enzo C.]

Re: 1967 Big Block Fan Shroud

Hi Joe
I appreciate your input always...
So would you say the shroud came on the car from factory with part numbers on it ???
Or was it a service replacement and those came with part numbers ???
Maybe someone can chime in with a original big block Car

[Joe L.]

Re: 1967 Big Block Fan Shroud

Hi Joe
I appreciate your input always...
So would you say the shroud came on the car from factory with part numbers on it ???
Or was it a service replacement and those came with part numbers ???
Maybe someone can chime in with a original big block Car

Enzo------


I think it could be either. Both PRODUCTION and SERVICE parts could have part numbers on them. In addition, as I've said previously, SERVICE parts manufactured at the same time as PRODUCTION parts were almost invariably identical in every way. GM did not make SERVICE parts any different than PRODUCTION parts. Of course, later manufactured SERVICE parts, even of the original part number, might deviate from the original parts in certain ways.

[Enzo C.]

Re: 1967 Big Block Fan Shroud

does anyone have pictures of a big block original shroud

[Tom D.]

Re: 1967 Big Block Fan Shroud

1967 390 HP. What photos needed?

Enzo: And, see also:
https://www.forums.ncrs.org/showthre...hroud+radiator

[Enzo C.]

Re: 1967 Big Block Fan Shroud

I need the bottom lip and top center section the mounts to the bracket

[Ronald L.]

Re: 1967 Big Block Fan Shroud

Enzo - you have good pics of an original 67 big block fan shroud. I have three more if you need to see more c'mon down.

General Tire was NOT!!! the supplier for mid-year fiberglass.

What you have is a C3 1968 BB fan shroud.
Better pics of the differences between 66 and 67 were posted a month or so back, further details dates nearly ten years now.

The data has not and will not change.

1966 was very different from 67, most prominently on the right side, and 68 isn't even on the same playing field. It was designed for a different more slanted core support among other details.


There was never a respectable aftermarket shroud produced.

Most lost 66 & 67 BB fan shrouds were replaced with 68 with a moderate amount of modifications.



DS logos mold numbers and GM part numbers are in all the mid year fiberglass panels, including the same stickers that are found on fan shrouds.

Fenderskirts, quarter panels, top surrounds. All the panels had these, two numbers molded in, sticker usually close by, "Under" the paints and primers.

So what this demonstrates to you is that there was a very disciplined process for parts manuafcturing in the GM and supplier plants, including quality control process inspection stickers.

This was not a willy nilly by guess by gosh hope we getem together today process. Never was.

And - no amount of hopium is every going to change a 68 shroud into a 67, likewise for a 66.

[Joe L.]

Re: 1967 Big Block Fan Shroud

Enzo - you have good pics of an original 67 big block fan shroud. I have three more if you need to see more c'mon down.

General Tire was NOT!!! the supplier for mid-year fiberglass.

What you have is a C3 1968 BB fan shroud.
Better pics of the differences between 66 and 67 were posted a month or so back, further details dates nearly ten years now.

The data has not and will not change.

1966 was very different from 67, most prominently on the right side, and 68 isn't even on the same playing field. It was designed for a different more slanted core support among other details.


There was never a respectable aftermarket shroud produced.

Most lost 66 & 67 BB fan shrouds were replaced with 68 with a moderate amount of modifications.



DS logos mold numbers and GM part numbers are in all the mid year fiberglass panels, including the same stickers that are found on fan shrouds.

Fenderskirts, quarter panels, top surrounds. All the panels had these, two numbers molded in, sticker usually close by, "Under" the paints and primers.

So what this demonstrates to you is that there was a very disciplined process for parts manuafcturing in the GM and supplier plants, including quality control process inspection stickers.

This was not a willy nilly by guess by gosh hope we getem together today process. Never was.

And - no amount of hopium is every going to change a 68 shroud into a 67, likewise for a 66.

Ronald-------


The GM #3886887 seen in Enzo's first post is the left side component of the 1966-67 427 fan shroud. It was NOT a component of the 1968 fan shroud.

General Tire manufactured many plastic components for Corvettes in that period.

[Ronald L.]

Re: 1967 Big Block Fan Shroud

Joe - about ten years back I posted early 68 fan shrouds with all three 66 67 part numbers, the tools were re cut and modified tot he 68 version hence not ever having a 66 or 67 part for service once those two model tears respectively had passed.

Never ever will you see General Tire Logo on a 66 67 shroud.

Like I said, I have several more to pull data from, at the moment, 4 66 and six 67 shrouds....

and that does not count those that have been sold in the past ten years.

This is not the olny example of a GM Corvette part that kept the same number yet was considerably different later on in production...

[Joe L.]

Re: 1967 Big Block Fan Shroud

Joe - about ten years back I posted early 68 fan shrouds with all three 66 67 part numbers, the tools were re cut and modified tot he 68 version hence not ever having a 66 or 67 part for service once those two model tears respectively had passed.

Never ever will you see General Tire Logo on a 66 67 shroud.

Like I said, I have several more to pull data from, at the moment, 4 66 and six 67 shrouds....

and that does not count those that have been sold in the past ten years.

This is not the olny example of a GM Corvette part that kept the same number yet was considerably different later on in production...

Ronald-------


You mean they modified the 66-67 shroud components tooling for the 1968 application but left the 66-67 part numbers embossed on the 68 components??????????

Also, if they modified the tooling for the 1968 application that means they would not be able to manufacture the 66-67 components for SERVICE after 1967.

[Ronald L.]

Re: 1967 Big Block Fan Shroud

Joe, all this was assembled about ten years back, yes, I posted pics in those dark days where resolution was limited to post pictures, before IPhones, and all that.

An yes the tooling scenario is the case we have stated many times over the years.

This is not the only case of part changes to tools with no exact part for the prior model year, air cleaner bases, where I among others have seen the prints, clearly show the part changes, August 1966 to be exact.

The 66 service part only existed until they took the tool down to make the changes for 67, and then 68 same thing occured again. When you look at the cost of the huge blocks of steel required for these tools, it was and having been there, was expected.

You were asked to see if an existing tool could be recut to make the new model part and provide "some level" of backward service parts.

[Mark M.]

Re: 1967 Big Block Fan Shroud

Hello Enzo, I've seen the pictures of the shroud you acquired which has the 67 #'s cast in it. All three pieces are of the 68 427 shapes. It's the same odd shroud that Ronald described exactly in the (66-67 radiator shroud ) discussion I started this past summer, which he said he sold. I agree that it was probably an early replacement. Tom Dingman placed a link up above here to that discussion and there are pictures I posted of numerous shrouds. The 66-67 bottom lip was small, 68 lip was much larger. The top part which mounts to the bracket was different in 68 as seen in the pictures. Ronald in the previous discussion mentioned, I asked if you or anyone had an original late 67 427 shroud. Take a look at the pictures in Tom's link at page 2; post #2 from Aug. 31 2020. There are three pictures of a 67 production line 427 shroud with GT on each of the 3 parts. It's one of 4 original 67 shrouds I have, which are all the same except the one with GT on it's parts. It has original stickers and hose clamp with it. At this point I can only speculate that this may be a very late 67 production line shroud. 68 shrouds have the circled General Tire cast in with part numbers. Somewhere around 67-68 General Tire took over the AO Smith plant. What Ronald said of tooling for replacements makes perfect sense.

[Enzo C.]

Re: 1967 Big Block Fan Shroud

Hi Mark
I checked all the pics and everyones explanation
You guys are a wealth of knowledge and i appreciate your efforts...
I want to do it once and do it right !!!

[Joe L.]

Re: 1967 Big Block Fan Shroud

Hi Mark
I checked all the pics and everyones explanation
You guys are a wealth of knowledge and i appreciate your efforts...
I want to do it once and do it right !!!

Enzo------


The only photo of your shroud is the one you originally posted. I would like to see other photos.