65 exhaust heat shields

[John M.]

I ordered some heat shields from LIC, the ones for the exhaust pipes forward of the transmission crossmember, and the package says "Paint semigloss black." The judging manual does not say anything about paint on these. Could LIC be refering to a "mitted" application (which I don't think I'll be doing)?

Thanks
John McRae 30025

[John H.]

Re: 65 exhaust heat shields

I ordered some heat shields from LIC, the ones for the exhaust pipes forward of the transmission crossmember, and the package says "Paint semigloss black." The judging manual does not say anything about paint on these. Could LIC be refering to a "mitted" application (which I don't think I'll be doing)?

Thanks
John McRae 30025

John -

There was never any "mitting" - that's a figment of someone's past imagination.

[Scott S.]

Re: 65 exhaust heat shields

Could LIC be refering to a "mitted" application (which I don't think I'll be doing)?

John,

I don't think there was any "mitting" done, anywhere on these cars. I suspect the paint LIC refers to is their own LIC #45-33, which is their "high temp semi-flat black for exhaust heat shields" spray can paint. Like the '65JG, the 1966 & 1967 JGs don't mention anything about black paint on the exhaust heat shields either.

In the archives I have read that original exhaust heat shields were natural/unplated/unpainted, but that GM service replacements were painted black. The 65JG says "The entire lower surface of the exhaust system is blacked out using a 'mitted' application of the blackout material." (p. 152) John Hinckley has posted many times that this is an error as far as "mitting" is concerned, and will be removed from future JGs.

I don't know if the exhaust system was sprayed with blackout all the way as far forward as where the heat shields were attached, as the 65JG seems to say. I can see how they could spray the mufflers with blackout, but I don't know how they would easily access the exhaust pipes all the way to the engine with blackout paint. Even if they did, since the exhaust heat shields attach to the top side of the exhaust pipes, it seems they would only have received indirect blackout coverage, if at all.

[edit: just saw John's post, didn't mean to duplicate what he already said]

[David L.]

Re: 65 exhaust heat shields

I have 2 NOS heat shields that are for 1965 Corvettes w/327 with GM stickers on them, GM # 3828281 and GM # 3864178. One of them is painted black and the other is natural.

Dave

[Scott S.]

Re: 65 exhaust heat shields

I have 2 NOS heat shields that are for 1965 Corvettes w/327 with GM stickers on them, GM # 3828281 and GM # 3864178. One of them is painted black and the other is natural.

Dave

Dave,

Just curious, does the black NOS exhaust heat shield look like it was dip-painted, completely coated front and back, maybe with runs visible?

[David L.]

Re: 65 exhaust heat shields

Scott,

As I remember the black NOS heat shield is completely black. I tried to find them but they must be stored in a box upstairs in my garage attic. When I come across them I will let you know. Several years ago I put them on Ebay but without any interest. I guess many prefer the reproduction shields instead of NOS.

Dave

[John M.]

Re: 65 exhaust heat shields

Thank You Everyone,
I guess I won't paint them. I know they'll rust but I can deal with that.
John

[Scott S.]

Re: 65 exhaust heat shields

Thank You Everyone,
I guess I won't paint them. I know they'll rust but I can deal with that.
John

John,

This is the best Thread I have found on the subject so far: 65 Exhaust heat shields

[David L.]

Re: 65 exhaust heat shields

Dave,

Just curious, does the black NOS exhaust heat shield look like it was dip-painted, completely coated front and back, maybe with runs visible?

Scott,

I have yet to find the actual NOS shields but I just found a photo of them that I took on Feb. 21, 2011.

Dave

[Scott S.]

Re: 65 exhaust heat shields

Scott,

I have yet to find the actual NOS shields but I just found a photo of them that I took on Feb. 21, 2011.

Dave

Dave,

Thanks very much for the follow up. It's interesting that the dark circles where the 'clamps' are attached to the underside of the shields are visible on the unpainted NOS example. This is very similar to the current reproductions, but I don't remember this marking being quite so obvious on "original" examples.

As for the "painted vs. unpainted" aspect, I did find a GM photo of painted 1963 exhaust shields, the bellhousing is marked 12-21-62.

[David L.]

Re: 65 exhaust heat shields

Scott,

According to my research only the 1966-1967 exhaust pipe shields have the "ribs", GM # 3851673 and 3864180. The LH 63-65 shield is GM # 3828281 and the RH 63-64 shield is GM # 3828282. The RH 65 shield is GM # 3864178.

Dave

[Alan D.]

Re: 65 exhaust heat shields

Scott,
Would not give that photo much creditability, look closely at transmission, shifter, clutch folk, . .

We also need to know if the question is for 2 or 2 1/2 inch exhaust???
Here are some numbers for 2 1/2" exhaust.
63 left 3828285
63 right 3828286
64 left 3851673
64 right 3851674
65-67 left 3851673
65-67 right 3864180
These were complied from a survey by Michael Hanson, believe he may also have the 2" stuff also

[Scott S.]

Re: 65 exhaust heat shields

David and Alan,

I don't know enough about the early transmissions or clutch forks to determine the year, I thought the '63 shift knob should be different (black?), but I figured minor differences might be due to pre-production or testing status. What model year does it look like to you?

Both of these pictures (post #10 above and this post) are from the Noland Adams website collection. If I remember correctly (website is not up currently), the disclaimer said that posting up to three (or five?) pictures a day on other websites for discussion was allowed.

The picture below is of a Powerglide car, the oil pan is dated 2-16-62. Can't see whether the exhaust shields are ribbed or not, but they do appear to be painted black.

[David L.]

Re: 65 exhaust heat shields

Dave,

Just curious, does the black NOS exhaust heat shield look like it was dip-painted, completely coated front and back, maybe with runs visible?

Scott,

While looking for other parts I came across my NOS 65 shield (GM # 3864178, natural finish) as well as my NOS 63-65 shield (GM # 3828281, painted black). The entire shield is painted black and it does have one "run" or paint "drip". I previously posted a photo on April 29, 2012.

Dave

[Scott S.]

Re: 65 exhaust heat shields

Scott,

While looking for other parts I came across my NOS 65 shield (GM # 3864178, natural finish) as well as my NOS 63-65 shield (GM # 3828281, painted black). The entire shield is painted black and it does have one "run" or paint "drip". I previously posted a photo on April 29, 2012.

Dave

Dave,

Thank you very much for the update.

I re-checked the photo in post #10 (the original is at least twice as large), the valve cover sticker says "360", which I think was only applicable to fuel injection in model year 1963. There may be another clue to the model year in the vertical LH ignition shield or the PVC grommet and tube at the top rear of the engine block, I don't know enough about '63 to be sure.

Scott