'67 Fan Shroud?

[Michael S.]

I am trying to determine what this fan shroud fits. I think the part number for the complete shroud is 3918540
Two numbers pressed into a couple of the pieces that make up the shroud are 3935571 and 3935572.
Can anyone help me identify what this shroud fits?
Thanks,
Mike

[David L.]

Re: '67 Fan Shroud?

Mike,

The 1968 Corvette AIM lists the following shroud pieces in UPC L36, sheet A13:
3935569 front upper
3935571 left
3935572 right
None of these 3 part numbers appear in any of my vintage Chev. parts catalogs (1966, 1967, 1968, 1969, etc,) or my Chev. & Parts History catalogs 1965 to 1990.

The part numbers for the shroud pieces for the 1968 Corvette (427)(exc. Tri-Carb.) listed in my 1968 Chev. Parts Catalog (Oct. 1967) are as follows:
3919747 front (w/C.A.C., T.H., 427)
3919741 left
3919742 right

As per Chevrolet Parts History:
3919747 in May 1968 to 3938942 in Nov. 1970 to 3938940
3919741 in July 1968 to 3938940
3919742 in July 1968 to 3938940

My 1981 Corvette Parts Catalog (Nov. 1981) list GM # 3938940 for the following:
66-68 Y (427)
68 Y W/A.C., T.H.(EXC. 427)
70 Y (350 W/3 SPD. (EXC. H/PER, 454))
70 Y (350) W/A.T.

It appears that your shroud is original equipment for the 1968 Corvette w/L36, a "one year wonder". Check with owners of other 1968 Corvettes w/427.

Dave

[David L.]

Re: '67 Fan Shroud?

The 1966 Corvette 427 shroud pieces (3888269, 3886887, and 3886888) as well as the 1967 Corvette 427 shroud pieces (3888269, 3886887, and 3911110) were all replaced with GM # 3938940 as per Chev. Parts History at various times (5/70, 11/69, 7/67, and 3/70).

GM # 3938940 must be a one-piece fan shroud.

Dave

[Joe L.]

Re: '67 Fan Shroud?

GM # 3938940 must be a one-piece fan shroud.

Dave

Dave-----


It is. I have an NOS example [not for sale]. It was discontinued without supercession in September, 1995.

[David L.]

Re: '67 Fan Shroud?

Dave-----


It is. I have an NOS example [not for sale]. It was discontinued without supercession in September, 1995.

Joe,

Are their GM part numbers on each of the 3 individual pieces? I assume it was made of 3 pieces, or maybe not.

Dave

[Joe L.]

Re: '67 Fan Shroud?

Joe,

Are their GM part numbers on each of the 3 individual pieces? I assume it was made of 3 pieces, or maybe not.

Dave

Dave-----


Yes, it's assembled from 3 separate pieces. My recollection is that there are part numbers on each of the pieces, but I'm not sure. Maybe I'll dig it out when I get a chance.

[Joe L.]

Re: '67 Fan Shroud?

Joe,

Are their GM part numbers on each of the 3 individual pieces? I assume it was made of 3 pieces, or maybe not.

Dave

Dave-----


I got ambitious and dug it out. It is assembled from 3 pieces which are riveted together.

DSCN2772.jpgDSCN2773.jpgDSCN2774.jpgDSCN2775.jpg

[David L.]

Re: '67 Fan Shroud?

Joe,

The 3 pieces that make up my 1966 shroud are bonded together. I assume that the 3 pieces of the factory installed 1968 shrouds were also bonded together.
Were "early" replacement 3938940 shrouds bonded and "later" replacement 3938940 shrouds riveted?

Dave

[Michael S.]

Re: '67 Fan Shroud?

Thanks, Dave I am going to do more checking.
Mike

[Joe L.]

Re: '67 Fan Shroud?

Joe,

The 3 pieces that make up my 1966 shroud are bonded together. I assume that the 3 pieces of the factory installed 1968 shrouds were also bonded together.
Were "early" replacement 3938940 shrouds bonded and "later" replacement 3938940 shrouds riveted?

Dave

Dave-----


That I do not know.

[Michael S.]

Re: '67 Fan Shroud?

Dave-----


That I do not know.

This one is bonded and riveted.

[Joe L.]

Re: '67 Fan Shroud?

This one is bonded and riveted.

Michael-----


The one I have could also be bonded in addition to the rivets. I can't say for sure

[Ronald L.]

Re: '67 Fan Shroud?

The very early 68 BB shrouds actually have the 67 side part numbers molded in them, only. At some time the supplier got it right and put the proper numbers in there. Service parts from that time into the 70's had one side riveted with two rivets in addition to the traditional bonding, and only one part number and no other codification molded in the part. Additional rivets on service parts was not factory original, but an expected action to keep the service parts in one piece in storage. Joe, the numbers you have in your shroud look like it was something at the very end of the service run, lots of codes for molding and maybe dates there. As well, you can see some bonding material in one of your pictures. There are ample 68 BB shrouds available as it truly is a one year wonder, just like other mid year one year wonders like the 65 396, 66 327, and 66 427 air cleaner bases.

[Michael S.]

Re: '67 Fan Shroud?

I got a verification on all of the numbers. The whole shroud is #3938940. The two side pieces are 3935571 and 3935572. The tree pieces are bonded and riveted together. It is listed in my '83 book as correct for a '66-'68 427. The same number is also listed for other applications up to '71. It does not have the slits and slots to attach the extension piece like the one on my '67 427 with A/C. It is also missing a large almost square hole in one upper corner. I would assume this part is correct for a non-A/C car.

[Joe L.]

Re: '67 Fan Shroud?

I got a verification on all of the numbers. The whole shroud is #3938940. The two side pieces are 3935571 and 3935572. The tree pieces are bonded and riveted together. It is listed in my '83 book as correct for a '66-'68 427. The same number is also listed for other applications up to '71. It does not have the slits and slots to attach the extension piece like the one on my '67 427 with A/C. It is also missing a large almost square hole in one upper corner. I would assume this part is correct for a non-A/C car.

Michael-----

The shroud's components are 1968 model year pieces which, assembled into the SERVICE GM #3938940 shroud, are SERVICE for 1966-67 Corvettes. They are NOT the components originally used for 66-67.