Heat riser gasket problem
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Heat riser gasket problem
Ok, so I'm a bit confused. I have a 65 f100 with the 352 FE and need to replace the heat riser. I have a n.o.s. original heat riser but need the gasket that goes in-between the exhaust manifold and the riser. From forums I thought it was C1SZ-9450-A, but the gasket got here today and doesn't fit. The stud holes in the gasket are right around 3 inch from center to center, but both the riser and the actual studs on the exhaust are 3.25 from center to center. I found another C1SZ-9450-A with a ruler for scale and it also seemed to be 3 inches from center hold to hole as well. Did I just get the wrong gasket in the correct box or is there something I'm missing here? I would also like to find replacement studs if anyone knows the part number. Thanks.
See A Man About A Horse
Joined: Apr 2003
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From: Mariposa, Ca.
Run your new heat riser down to your local Napa store, let them match one up. They can get you the right studs, too. I did not have my heat riser available so I just bought two sets, then tossed the unused too-long studs into my tool box , for the future, where they’ll never see the light of day again. My truck used a flat gasket on one side of the heat riser, and a donut type on the other.
See A Man About A Horse
Joined: Apr 2003
Posts: 4,935
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From: Mariposa, Ca.
Sorry for your troubles. There’s bound to be an auto parts store near you that’s got an old timer that doesn’t need to resort to a book, let alone a computer screen - he just knows. When you find that guy, he’ll be your new best friend. Mine happens to be at the NAPA store. But more than him, is NumberDummy, and by a huge margin.
Is there a good exhaust shop near you, that could work?
Is there a good exhaust shop near you, that could work?
Logistics Pro
Joined: Jun 2018
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I assume this is what you talking about. If so no gaskets are needed.
NOS 1965 1966 Ford Pickup Exhaust Control Valve F-100 OEM 65 66 FoMoCo | eBay
NOS 1965 1966 Ford Pickup Exhaust Control Valve F-100 OEM 65 66 FoMoCo | eBay
See A Man About A Horse
Joined: Apr 2003
Posts: 4,935
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From: Mariposa, Ca.
I assume this is what you talking about. If so no gaskets are needed.
NOS 1965 1966 Ford Pickup Exhaust Control Valve F-100 OEM 65 66 FoMoCo | eBay
NOS 1965 1966 Ford Pickup Exhaust Control Valve F-100 OEM 65 66 FoMoCo | eBay
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Ibuzzard- Yeah, in the box for my replacement I see discoloring in the shape of the gasket so its just missing. Autozone does list one here https://www.autozone.com/gaskets/exh...041/344052_0_0 but it's not available locally so I cant verify the hole size to be sure. Its possible a newer replacement might have come with one too but the newer ones have a tendency to seize closed. The original ones just get looser and rattle, or worst case develop an exhaust leak.
Christmas- That is the same type of heat riser but there is a gasket for it. Otherwise it would be two not so smooth surfaces just sitting together. It's a fiber/paper one with a metal ring in the middle. I know because it took me a week to finally get the original one off. Guess that's what 56 years of exhaust heat will do....
Christmas- That is the same type of heat riser but there is a gasket for it. Otherwise it would be two not so smooth surfaces just sitting together. It's a fiber/paper one with a metal ring in the middle. I know because it took me a week to finally get the original one off. Guess that's what 56 years of exhaust heat will do....
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I based my part number on this post https://www.ford-trucks.com/forums/9...52-engine.html. I am now thinking the correct gasket part number is actually C5TZ-9450-A not C1SZ9450A, even if its blasphemous to argue with Number Dummy. That would make sense because the donuts are C5TZ-9450-B. Of course the first part number I used could have been a later replacement and I just got the wrong one in the right box. I guess Ill pick up a nos one with this part number off ebay and see. Now I just need to locate the studs. Is there anything special about exhaust studs, like heat treating? Both sides of the studs are threaded the same, I could just use a threaded rod and cut to size.
Lead Gopher
Joined: Aug 2012
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From: Seattle
Just fyi - there are two different heat riser valves depending on sequence number. The heat riser that Christmas posted from eBay was used until April 1965 and then they changed to a different design. The sequence number where they made the change was 672,001.
The one on the left is C5TZ-9A427-A (1965 before 672,001) and the right is C5TZ-9A427-D (1965 after 672,001 and 1966). The newer one is about a 1/2" thicker and some other changes to the flywheel location.
The one on the left is C5TZ-9A427-A (1965 before 672,001) and the right is C5TZ-9A427-D (1965 after 672,001 and 1966). The newer one is about a 1/2" thicker and some other changes to the flywheel location.
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Ok, I can officially confirm the correct gasket part number is C5TZ-9450-A. They are a perfect fit, and the metal ring is the same size as the original. If this one lasts 56 years like the last one I'll never have to worry about it again, but I bought a couple just in case. Still haven't figured out what to do about the studs, maybe they are good enough to reuse.
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