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#1
12-20-2025, 01:34 AM
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Exhaust heat riser removal
Have a '64 389, with the exhaust crossover blocked at the heads.
I know Pontiac eliminated the heat riser valve for '69, so I was thinking I might remove it from mine. What's the best way to go about doing this? Almost seem like it's be less work to remove it all & tap/plug the holes, than trying to separate the butterfly & leave the 'axle' in place. |
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#2
12-20-2025, 08:03 AM
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heat riiser removal
I used a cutoff wheel on a dremel to remove it, then tapped the holes and put screw in plugs in.
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#3
12-20-2025, 10:58 PM
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I cut the shaft and removed the flapper assembly. Then had a round plug machined to fit in the hole and pressed it in.
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