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Old 02-13-2008, 08:50:29 PM   #1
Pacecarjeff
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Radiator hose for BB 2nd Gen

This has been the typical shape for the BB upper hose #3979192 on the 2nd gen cars.
(As well as small block - showing different number -->3970124)
all the resto houses sell this shape - I believe it is wrong.





After researching a while - I think I have an exact match on what it is REALLY supposed to be.
Here is one I made (top), next to the original hose I found.

What do you guys think? - Is this correct?




I am still looking for an original BB lower - any one have one?
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Old 02-13-2008, 09:01:41 PM   #2
Dave Nelson
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Pacecarjeff:I believe the original hose has a slight bend at the thermostat housing,some repros do not have this bend.
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Old 02-13-2008, 09:11:26 PM   #3
Pacecarjeff
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I need to find an original 124 hose also -
I believe that shape is not exactly right either.
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Old 02-16-2008, 09:33:10 PM   #4
70-SS/RS-L78
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Hear are 2 Original 1970 Big Block upper hoses, The hose on the bottom is the Original L78 upper hose and clamps from Kentucky Gold.
The middle one is a GM upper hose from a 70 L34 I parted a few years back. The Top hose is “Not Even Close”. It is a Piece of $hit Reproduction!
It has the correct markings; but it is JUNK!!!

[
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Old 02-16-2008, 10:31:03 PM   #5
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Thanks - do you have pictures of the lower hoses too.
I would like to see them.

That is kinda what I was saying, the repro hoses for these applications are not right.
I want to try and produce them exactly correct.
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Last edited by Pacecarjeff : 02-16-2008 at 10:39:18 PM.
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Old 02-17-2008, 12:01:51 PM   #6
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Mark, I tried using that top (upper) hose on my car. That thing was a mess!!
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Old 02-17-2008, 08:01:34 PM   #7
79ZED
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The 3970124 hose was designed for a/c cars, at least in SBC form. The 3970120 was for non a/c cars.

You can use the 124 hose on a/c or non a/c cars, but you can't use the 120 hose on a/c cars because the hose is very close to hitting the a/c pulley or belt.

I guess they just wanted to simplify parts stocking.

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Old 02-17-2008, 08:39:55 PM   #8
Pacecarjeff
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I don't show a 3970120 hose in any of my books.
Do you have a picture of an original hose?
From what I can see, the 124 hose is noted for ALL SB Camaros 1970-75 SB.
I don't think the current repro shape being produced is exactly right.

Below is the hose shape for the 3970124 that I believe is more like the original.
However - I don't want to change over from the other one (way at the top of this thread)
until I get another original example to compare to.

I had one for a short time, but it was very early in my research, and I had to send it back to quickly.



Edit...........
I have now determined that this hose above, is the correct shape for the 3970120 non H-Duty Radiator. Broadcast code JN.
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Last edited by Pacecarjeff : 03-05-2008 at 02:10:10 PM.
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Old 02-18-2008, 01:29:22 AM   #9
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Pacecarjeff,

Sorry, I don't have any pictures, wish I did though. My GM Parts Manual 1977-81 lists the two hoses as described. It also shows the same in the assembly manual. I no longer have my original 3970124, but I have seen the 120 hose and it is much straighter than the 124, since it doesn't have to "go around" the a/c clutch and belt.

I'll dig up my GM Illustrated Parts Book and have a look for an illustration.

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Old 02-18-2008, 04:15:04 PM   #10
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Just looked through my AIM for 1970.
There it is- page 79 -UPC6/B3 --- the hose called for for the small block V8 is the 3970120.

Don't find the 3970124 hose listed in this .....
and I don't see the BB hoses in this thing anywhere ???
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Old 02-19-2008, 10:43:16 PM   #11
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The 3970124 hose is listed with HD cooling which is the supplied radiator for the 70 Z-28. Below is a pic of an original NOS 3970124 hose and picture of an original new 70 LA built Z-28 underhood shot showing the hose.







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Old 02-20-2008, 02:57:45 AM   #12
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GREAT PICTURES.
Thanks -- those are a big help.
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Old 02-20-2008, 09:19:59 AM   #13
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Jeff, please let me know what hoses would be correct for a 1972 SS-396 Camaro w/o A/C. You may PM me with cost and availibilty.
Thanks, Greg
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Old 02-20-2008, 10:34:41 AM   #14
Pacecarjeff
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You need a 3973192 - 70-72 Camaro Upper BB Radiator Hose.

click here for all applications ---> Radiator Hoses
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Old 02-20-2008, 03:54:14 PM   #15
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Jeff, Are you buying these misc hoses from XYZ source, removing any XYZ printing, logos, etc .............and imprinting the clean new XYZ hose with your reproduction, same as original numbers/letters/words??????

Is this THE process??????????????

Just want the education, before I buy!!!!!!!!!!!!
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