'69- '72 3956119 fan shroud configurations?

[Tom L.]

Were there any differences in these shrouds over the years of production? Including service replacements??

Here's why I ask. My '72 LS5 has been missing it's 089 extension since I've had it. 10 years looking and I found an original from what I was told from a '69 attached to a shroud which I thought I didn't need, bought it anyway since it's a tough part to find. I tried to put it on today which I thought would be simple but it didn't fit the extension in my car at all. Not even close, but was a perfect fit on the one shroud it came on.

I started looking closely and found two differences. the first was next to the part number. The shroud I bought has the correct number and in the 6 sided logo it read "UCC". The one in my has the part number but the one on the '72 did not have the "UCC". See the pics.



The other is at the bottom of the shroud where the extension screws onto the shroud. Pics of the one on my car were hard to get but it's a completely different configuration. Look closely.




The only thoughts I have are that the configuration changed over the years or the one in my car (the one without the "UCC" logo) is a repro. Any help??

[Russ S.]

Re: '69- '72 3956119 fan shroud configurations?

Interesting that although the one doesn't have the UCC letters it does have the six sided logo that the letters go in.

[Paul O.]

Re: '69- '72 3956119 fan shroud configurations?

For those who do not know the UCC stands for Union Carbide Corporation. I have seen over the years many original shrouds without the UCC within the 6 side logo.

[Tom L.]

This is claims to be a NOS shroud, I guess that means an over the counter replacement. Note it has no UCC logo and in the pics the differences in the notch I described in my earlier post are the same.

This one, the seller says he bought it new "years ago", I guess that also suggests that it is an over the counter replacement. In the pics it too is missing the UCC logo and has the notch described in my earlier post.

Lastly, the reproduction

[Mike E.]

Re: '69- '72 3956119 fan shroud configurations?

Tom,
Pics are not the greatest, because the shroud is on the car. Never damaged nose, very original component 71. Here are a pair of pics. I think they will help start narrowing things down.
Mike

[Tom L.]

Re: '69- '72 3956119 fan shroud configurations?

Thanks Mike, I guess that the no UCC doesn't mean a lot. Curious how the numbers are not as pronounced on mine though. The bottom of your shroud looks like the one I have off the car from a '69. The groove that the extension sits in is there on yours and the one of the '69 I have. Not there on the one on my car. Not sure of much now except that the extension won't fit on the shroud in my car.

Anyone have a shroud with the odd bottom like mine? And its origin? Over the counter or original? Thanks!

[Mark E.]

Re: '69- '72 3956119 fan shroud configurations?

Photos are from a 1970 LS-5. I purchased the shroud over the counter from a Chevy dealer in 1990-91. The shroud extension was reused. The original shroud had a clean cut across the top of it. Removing these shrouds intact requires removing the radiator. My theory is a mechanic took a short cut (literally) and modified the shroud for ease of R/R.

As I recall, the arc of the extension is not a perfect match with the main shroud, but fits ok when screwed together.

[Mark E.]

Re: '69- '72 3956119 fan shroud configurations?

Here's the shroud receipt dated December 1990 from the local Chevrolet/Geo dealer. List price = $81.67; maybe double that in 2017 money.
They had the shroud in stock, but had to order the bell housing cover. Go figure.

[Joe L.]

Re: '69- '72 3956119 fan shroud configurations?

Mark------


That GM #3843943 bellhousing cover you purchased in 1990 had integral clips to attach to the oil pan rear lip. Functionally, this is a great improvement. However, the original GM #3843943 installed on your car did not have these clips.

[Mark E.]

Re: '69- '72 3956119 fan shroud configurations?

Mark------

That GM #3843943 bellhousing cover you purchased in 1990 had integral clips to attach to the oil pan rear lip. Functionally, this is a great improvement. However, the original GM #3843943 installed on your car did not have these clips.

Good catch Joe. When I acquired the car, the shroud was cut and the bell housing cover missing. Two bits out of a list of three pages of issues I saw. The car had led a hard life of quick fixes by rushed gas station mechanics. I consider it my rescued Corvette.

[Tom L.]

Re: '69- '72 3956119 fan shroud configurations?

Thanks for the pics Mark. The numbering looks exactly like the numbering on the one in my car. I'd lean towards my shroud as an over the counter piece, which is OK but doesn't help my extension fit any better. Good that yours ended up fitting. Mine not so much. I'd have to drill a couple of holes and bend the extension toward the rear of the car just to get it into the groove. It's an old plastic piece, not sure I'll be testing it's flexibility at this time. Thanks!!

[Mike E.]

Re: '69- '72 3956119 fan shroud configurations?

Tom,
i looked at two 71 LT1s with original shrouds today. I know they are 3956109 instead of 119. It appears to me that they are identical to the 119 except for depth. Neither had the hexagon nor the UCC. Both, however, at the bottom, where the extension mates to the shroud, has the "trough" type mating area. FWIW
Mike

[Michael B.]

Re: '69- '72 3956119 fan shroud configurations?

Two Pics from my 10/04/68 build date L68. Shroud is original. The extension was missing when I bought the car and was purchased from Paragon about 2000. Yours has an added relief hole to get the alternator pivot bolt out.

[Mike E.]

Re: '69- '72 3956119 fan shroud configurations?

Here are pictures of a January 71 shroud and extension. the hardware at the bottom of the shroud is non-original, and the extension is the dreaded 3-piece extension. Note that the shroud has no logo under the part number, and the bottom center has the channel/trough.