Author Topic: Correct finish for 68 Camaro 8 cyl w/AT exhaust heat stove 3916302  (Read 868 times)

bowtie68iho

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I recently purchased on eBay an NOS exhaust heat stove 3916302 for a 1968 small block Cheverolet (SBC) with automatic transmission.  It had the original GM parts sticker affixed to it (see photos in this post).  Exhaust heat stove 3916302 is depicted in the 1968 Camaro Assembly Instruction Manual under UPC M35, Sheet A22 for both RPO L30 (327 ci) and L48 (350 ci) engines with Powerglide (RPO M35) transmissions.

I already had an original one on my 350 L48 auto car, but it was in used condition with some very minor pitting and was painted in high temp cast iron color to preserve it against rust.  There was no way for me to determine the original finish on the one installed on my car because it was glass bead blasted to bare metal at some time in the past.

Several past CRG posts on the 68 SBC exhaust heat stove had replies that speculated whether the original finish was unpainted galvanized steel (like the 69 NOS heat stoves sold over the GM counter that we see occasionally on eBay) or was dipped in semi-gloss black paint before being installed on the engine by the factory.  On September 20, 2021, Ed ('bertfam') said "All these kinds of parts were dip-primed semi-gloss black, but the paint burned off the first time the car was started!" in his Reply #2 to the following CRG post ("L48 heat stove on driver side exhaust manifold"): http://www.camaros.org/forum/index.php?topic=19528.0.  That same post had photos of an original heat stove that post originator 'dlshady' said might have been a semi-gloss black.

Well, the NOS 68 SBC exhaust heat stove that I bought appears to have a satin black paint finish...not quite shiny enough to be a semi-gloss.  It would therefore seem reasonable for originality purposes (and concours Legends Judging) to first paint the 68 SBC exhaust heat stove with VHT FlameProof Coating 1,300-2,000-degree F flat black aerosol paint, then follow-up with VHT FlameProof Coating 1,300-2,000 degree F satin clear aerosol paint.

For those looking for this part for their car, it is Part Number 3916302 under Group 3.417 (Carburetor Air Heater Stove) and is listed in at least the following two GM references:

- Camaro 1967-68 Master Parts Catalogue No. 681A (1968, July) (Original work 1967, November), p. 40 lists it as: "1968/327 AND 350 ENGINE"

- Chevrolet Parts and Accessories Catalog P&A 34A (1969, February), p. 3-19 lists it as: "68 ALL w/A.T. (8 cyl.)"

Bernie
68 NOR SS/RS L48/M35 Convertible
Cordovan Maroon - Special Paint Exterior (black stripes)
Black Custom Interior
Silver Concours (Legends Class) at 2012 Camaro Nationals, Gold Concours at 2014 MCACN.

169INDY

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Re: Correct finish for 68 Camaro 8 cyl w/AT exhaust heat stove 3916302
« Reply #1 on: May 19, 2023, 07:27:40 PM »
Good info- Great post.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

rare396bronze

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Re: Correct finish for 68 Camaro 8 cyl w/AT exhaust heat stove 3916302
« Reply #2 on: May 21, 2023, 03:45:19 AM »
I have to agree with Ed. Just checked our 68 327 it looks more like a semi gloss. Motor has never been out of the car. Has alot of the paint still on the sheild. Car has less than 50,000 miles on it!

68L30

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Re: Correct finish for 68 Camaro 8 cyl w/AT exhaust heat stove 3916302
« Reply #3 on: May 21, 2023, 04:22:25 PM »
Great! Thank you for the info & pics. I still have mine, but it too was covered in a light surface rust. I assumed it was natural. My heat tube was always blacků guess I need an NOS one now!

Steve

bowtie68iho

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Re: Correct finish for 68 Camaro 8 cyl w/AT exhaust heat stove 3916302
« Reply #4 on: July 06, 2023, 10:27:37 PM »
Just a follow-up to this topic... 

Attached, are front and rear photos of my previously shown NOS heat stove which is now restored to the assembly line correct semigloss black color (using high temp paint) and ready for install on my 68 L48 with M35. 

My apologies, but the lower resolution required for posting on CRG has made the photos grainy if you have to zoom in for details.

Bernie
68 NOR SS/RS L48/M35 Convertible
Cordovan Maroon - Special Paint Exterior (black stripes)
Black Custom Interior
Silver Concours (Legends Class) at 2012 Camaro Nationals, Gold Concours at 2014 MCACN.

 

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