1969 Z/28 Exhaust manifolds

[rich69rs]

The heat stove on the passenger side exh manifold on cars with auto tran in '69 (obvioulsy non-Z28) is riveted to the exh. manifold which is different than the exh manifolds used on manual transmission cars.  The one in the attached PDF file (for auto tran) is fatter toward the rear to accomodate the heat stove.  It also has holes in it for the rivets to go into.  The spark plug heat shields bolt directly to the block.

See attached PDF file.

[Gambitt]

So manual trans 69 Camaros do not use any rivets?  The shields bolt directly to the block?

[JohnZ]

Don't confuse the riveted-on sheet metal heat stove that attaches to the exhaust manifold and feeds hot air through a tube to the air cleaner snorkel with the spark plug heat shields; the spark plug heat shields have been on every small-block Chevy V-8 since 1955, and they attach with 1/4"-20 bolts to tapped holes in the block.

[Gambitt]

Cool, thanks JohnZ.  Since my car never had the original exhaust manifolds, I never knew how they attached...but I am getting ready to order a set of the repo original type. 

[Dave69x33]

As noted in this e-mail tread, the shields were bolted to the block as shown in the attached.  The other two pics are of original restored shields.  It’s interesting to note that the LH driver’s side set, the bracket is separate from the shield and they are screwed together.  The passenger RH side shield and bracket is spot welded as one unit as shown.

[Gambitt]

Thanks Dave...that's the exact pics I wanted to see.

[Gambitt]

One more question Dave...french locks are still used, they are bent out and sit against the smog tubes?  I think that is what I see in your pics. 

[Gambitt]

Well, I now have a set of the repo exhaust manifolds...and I have to say, these things are nice!  I will be shipping them to Jerry very soon to have them reskinned. 

[Dave69x33]

Hello Gambitt,

It been quite a while since I have been on the site, so sorry for the long delay in responding to your question.

I had to bend the loop portion of the French lock outward to clear the smog tube fittings.  It will not fit over the top side of the tube. 

I just now quickly looked thru my pic library for a pic of an unrestored 69 Camaro (manual shift car) that still had the exhaust manifolds and French looks but did not see one.  If I can find the pic, I'll post it.