66-67 427 radiator shroud
I'm looking for help from anyone with a 66-67 427 car who thinks their radiator shroud may be the original. The 66 and 67 T I manuals suggest a 1/4" flat head rivet used as a fix on top left joint. I have a number of originals that are both grey and black fiberglass. All the grey ones except one have the flat rivet on top left joint. All the black ones have no rivet. If anyone willing to help could list the year, approximate vin, A O Smith or St. Louis, with or without the flat rivet on top left joint and I know the fiberglass color is too much to ask for. I'm guessing that 66 were grey and possibly early 67's too. They were all painted black from the factory but bare spots are not uncommon. I appreciate any help and hope it may help others with thier cars.
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Re: 66-67 427 radiator shroud
Hi- I have a '66 L72 Cpe. (Docs. back to and including orig. owner), Oct. 22 build, vin# 37xx,and AO Body.
It has the upper L/H rivet, but I would describe the rivet as having a "dome", or "round" head.
The shroud itself is grey fiberglass, painted Blk, with bare spots.
By the way- At what point were the shrouds installed?Comment
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Re: 66-67 427 radiator shroud
Thanks Vernon and E J. We're off to a good start with two early 66's. I have seen that rounded head rivet on these shrouds and it may be more rare. I believe the shrouds were all put on in St. Louis so A O Smith info would not matter here. I'd also like to see late 66, early 67 and mid production 67 to show were grey to black fiberglass started and when the rivets may have stopped. I'm curious if any 67's had gray glass and or a rivet. The shrouds are in the aim to be bonded together in production. There may have been a few assembled with grey and black parts in the 3 parts as grey was used up when black parts came in. I have and have seen NOS pieces which are rare for the 427 cars and they're all black. There's many 66-67 327 NOS shroud parts out there both grey and black. I know there's many nice original machines out there and do appreciate the help.Comment
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Re: 66-67 427 radiator shroud
Hi all, I am working on a Feb. 67 427/390 and a March 67 427/400, both cars have black fiberglass no rivet in either, both glued together, the 427/400 being AIR car has cut out on left side for alternator cooling, 390 does not. GaryComment
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Re: 66-67 427 radiator shroud
Morning....Would it be possible to get a pic of the rivet you are discussing? ThanksComment
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Re: 66-67 427 radiator shroud
In my experience I have never seen a stock original fan shroud on a 65-67 that had rivets in them! But every 65-67 replacement from GM had the rivets in them.
That should bring out all the "Mine is original because I bought it from the original owner guys".
Sorry,
JRComment
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Re: 66-67 427 radiator shroud
left side - 1.jpgright side - 1.jpg
Left side looks like it has two holes filled or partially filled with bonding agent / goop. I don't see this as a rivet.
Second photo is the right side joint. 1967 390 HP 427 in car number 11532. Made in STL. Less than 26,000 miles since.https://MichiganNCRS.org
Michigan Chapter
Tom DingmanComment
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Re: 66-67 427 radiator shroud
Joe Ray, Have you checked original cars for this rivet or lack of. It does not stand out as it's covered by the upper radiator hose. I have a number of the grey 427 shrouds with rivets and most of them also show the stickers. They are all damaged in one way or another so the assumption is they were replaced. I also have black 427 shrouds all without rivets which is seen on 67s. Replacements for the 3 sections were available early on which I've only seen in black. Over the years I've seen many 66-67 427 cars with the 68 427 style replacement shroud from GM. It fits, is usually black but has many differences. The 65 is totally different and another subject. If you have helpful proof, please share. Many 66 427 cars show this rivet. Lets also ask if any original 66 427 cars, don't have the rivet. Tom and Gary thanks for your input. Could both of you show a picture of the top pieces front where the bracket holds it. Gary, compare your 390 car shroud to your 400 car. The lack of the hole by the alternator is the 68 style. I will work on pulling some shrouds out and share pictures. Joe Lucia, if your there, your parts history skills may shed more light. Thanks allComment
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Re: 66-67 427 radiator shroud
Just found some part #s. 66-67 427 shroud parts left 3886887,right 3911110, upper 3888269 , 68-71 depending on equipped 3938940Comment
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Re: 66-67 427 radiator shroud
Mark- I believe the 1966 right side shroud piece was listed as 3886888 in the 66 AIM.
If you haven't already, consider checking this older thread: Early 1966 Big Block Fan Shroud LabelComment
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Re: 66-67 427 radiator shroud
Don't know if I'm in the same area as you guys want, but the 1st shot is my shroud - upper, outside left joint with goopage - no rivets - no holes filled in that I can see
Second shot is the same joint from the fan side (inside)- no goopage - no rivets - no holes filled in
This is a late '67 2197x Body Build Date K28.
I have owned it since 1998, but can't verify the shroud's originality...all I know is I have not replaced what was on the car when I bought it.
Shroud upper left outside DSCN6511.jpg
Shroud upper left inside DSCN6512.jpgthx,
MarkComment
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Re: 66-67 427 radiator shroud
Hi- Here is a pic. of the shroud rivet on 66 vin 37xxIMG_20200729_160542670.jpgComment
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Re: 66-67 427 radiator shroud
This wasn't in the assembly manual.
Does someone have the service advisories from this time period?
I have had over 30 original 66 67 BB fan shrouds - and not ever one with the rivet -- it is a better idea that this was a dealer repair or a repair when there was a quality issue in the asy plant, however, like all this, there was documentation of off-standard processes.Comment
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Re: 66-67 427 radiator shroud
Ron, this rivet has a 9/16 flat head and is peened over on the outside surface of the shroud. It's the same type aluminum rivet used all over the c2 bodies during production. On the car it's not noticeable under the radiator hose. As far as I know yet it wasn't on 67s. You wouldn't see it unless you were looking for it. Of the 66s you had,were any shrouds out of the car and the small bump of the peened side would be easy to overlook. I presently have a number of the grey shrouds as used in 66 with the rivet. Black ones, no rivet. Many low mile and unrestored 66s are showing the rivet. E J your picture shows the peen side well. The other side should have a 9/16 head. These shrouds must have been assembled in an area of St. Louis using a jig to make enough for production needs. The use of a single rivet in the same spot and way show a production technique. So far it seems to be a typically used rivet on 66s but not 67. Other non typical ways may have been used to align and hold the parts til bond set. By 67 and black parts the rivet seemed to stop. I'm going by what I see on many damaged parts that were probably replaced and many 66 427 cars that don't have the GM 68 style replacement or a repro. I'm guessing if we get more 66 427 car owners to show whats on their car, the more rivets we'll see. Many shrouds were damaged during radiator change or hit front ends. I started this thread to see were the rivet stopped getting used and were black fiber glass started on 66-67 427 shrouds. I hope we all know more accurately what was used back than when it's done. Thanks AllComment
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