67 RH exhaust pipe heat shield ~ 14 inches

[Geoff C.]

Gerald:

I knew these blueprints were handy, because I briefly showed them to Joe Lucia at Carlisle. Luckily they were still all together. This is 6 of them, all 2 1/ 2” shields including the 1963 rear tail pipe shields: 3827491, 3828285, 3828286, 3851673, 3851674 and 3864180 - the 1967 RH is on top of the pile.

As luck would have it, my copy has been folded twice, so that exactly where they meet the paper is worn. The developed length is 14.?0. It looks like 14.30 or 14.80 and I cannot check other dimensions without a closer study. I just don’t have the time right now.

1968-1974 did not use these shields, and they did not reappear until the arrival of catalytic converters in 1975.

Geoffrey Coenen

PS Regret any delay, but I left for an early weekend getaway after I took these pics.

[Gerard F.]

Thanks for the info, Geoffrey

This is a real mystery to me. The shields came off for the first time in my 37 years with this 67, and they were actually in pretty good shape with no sign that a piece had broken off or corroded away. The part numbers in the 67 AIM match those in your post, i.e. 3851673 (LH) and 3864180 (RH). Yet the RH one is shorter (10") then the LH and looks like it was fabricated without the neckdown and extension beyond.

The only thing I can think of is that maybe they substituted other GM heat shields on my late 67. The 0626 assembly date, I understand from a Restorer article had some other anomolies in a substitution of a Chevy II engine block.
Maybe they also substituted heat shields. Are the heat shields unique to Corvettes or did other GM passenger cars have them in 1967?

Thanks again,

Jerry Fuccillo
#42179

[John H.]

Re: Thanks for the info, Geoffrey

Jerry -

Those things were stamped from strip stock, and it's possible that your "short" one was blanked from the very end of the coil and was "short-blanked" and still ran through the draw die; "stuff happens" in production