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Jul 21st, 2025 | | | | Joined: Aug 2010 Posts: 12 New Guy | | New Guy Joined: Aug 2010 Posts: 12 | Almost impossible to get to seal. What are my choices? Should I replace the intake too? | | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | The automotive machine shop where I worked part time for several years had a BIG belt sander, with a belt over a foot wide and a bed four feet long. It came in very handy for flattening out warped manifolds and other parts that needed to have gasket surfaces trued up over a wide area. It's been debated several times whether to leave the intake and exhaust bolted together during such a procedure. I prefer to loosen the bolts slightly to let the manifolds find their closest common plane, then hit the belt sander with the complete assembly.
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: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The 292 engine exhaust runs so hot it warps the manifolds all out of shape & cracked. Its best to find a good used one from a 230 or 250. They are usually good.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Aug 2011 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 45 | Always machine the 2 manifolds while bolted together,(like Hot Rod Lincon said), bolt them together down on flat surface,and then tighten the bolts. If resurfaced separate from each other, they will be out of plane, and will always leak. (Several past experiences taught me this lesson).
The older I get, I only want to work on older rigs.
| | | | | Joined: Aug 2010 Posts: 12 New Guy | | New Guy Joined: Aug 2010 Posts: 12 | This thing has been machined so many times until there is little left. If I salvage one from a 250 will i need the intake too?
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 |
Its best to keep them together unless you see signs of leakeage between them. You have to watch for the throttle linkage. There are variations in them. The early exhaust flange had 2 studs & the later ones had 3. You can use either if you changa the flange on the pipe.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Apr 2012 Posts: 158 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 158 | I'm installing a new Chinese A/M 292 exhaust manifold...(crude I might add) & snuggly attached the intake..with unit on a bench, I ran a straight edge along the assy. This takes the guess work out.... | | |
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