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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2008 Posts: 6 New Guy | | New Guy Joined: Aug 2008 Posts: 6 | I have a stuck heat riser on a 216. It is rusted in pretty good. I've soaked the shaft to manifold interface both inside and out with all sorts of stuff for almost a month now and no luck in getting it to move. I would like to remove the unit entirely and replace the shaft with a stainless steel piece and re-attach the weight and "butterfly" as well as machine the slot for the spring. I was wondering if any of you out there have done this "operation" before. | | | | | Joined: Jul 2007 Posts: 461 Shop Shark | | Shop Shark Joined: Jul 2007 Posts: 461 | Try tapping firmly fore and aft on the shaft and weight. Keep the shaft wet with penetrating oil while you tap on it. You can hit pretty hard, but not like you are trying to drive the weight through the manifold. When the shaft moves a little, squirt more oil and tap in the other direction. Twisting the weight usually doesn't work until the whole thing begins moving. I haven't done the replacements you are thinking about, so no comment there.
Harvester | | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | I've fabricated replacement parts on a few heat risers. The big problem is replacing the bi-metal spring, if it's weak or broken. Sometimes an automatic choke spring can be substituted. Don't make the shaft clearance too close, as it's an open invitation to rusting solid again if there's not at least a little slop in there.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Most of the vendors have the spring.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
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