Intake and exhaust manifold - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sick472 · 05-19-2020, 08:36 AM

I am seeing some pitting in your photos. Is that all that you are refering to when you say they are not in good shape? Cracks and warps are what make manifolds "not good".

I would not hesitate to sand blast those and reuse after removing and inspecting those areas for good thickness and checking the mating surfacces for flatness.

If you are concerned about the appearance alone...get some new ones if available.

**jabborabbo** · 05-19-2020, 08:52 AM

When I replaced the manifold gasket on my ‘67 a few years ago (the manifold had never been off the truck - it has a good bit or rust on it too), I sprayed the bolts and nuts down with Aerokroil two or three times a day for three days...and didn’t break anything! I’ve heard that removing a bolt that breaks inside the hole is a real PITA....

Swedchevy67 · 05-19-2020, 10:17 AM

Quote:

Originally Posted by jabborabbo

When I replaced the manifold gasket on my ‘67 a few years ago (the manifold had never been off the truck - it has a good bit or rust on it too), I sprayed the bolts and nuts down with Aerokroil two or three times a day for three days...and didn’t break anything! I’ve heard that removing a bolt that breaks inside the hole is a real PITA....

Great 👍

Swedchevy67 · 05-19-2020, 10:18 AM

Quote:

Originally Posted by sick472

I am seeing some pitting in your photos. Is that all that you are refering to when you say they are not in good shape? Cracks and warps are what make manifolds "not good".

I would not hesitate to sand blast those and reuse after removing and inspecting those areas for good thickness and checking the mating surfacces for flatness.

If you are concerned about the appearance alone...get some new ones if available.

Good idea. I try that 👍

05-19-2020, 08:36 AM	#1
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,131	Re: Intake and exhaust manifold I am seeing some pitting in your photos. Is that all that you are refering to when you say they are not in good shape? Cracks and warps are what make manifolds "not good". I would not hesitate to sand blast those and reuse after removing and inspecting those areas for good thickness and checking the mating surfacces for flatness. If you are concerned about the appearance alone...get some new ones if available. __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20

05-19-2020, 08:52 AM	#2
jabborabbo Senior Member Join Date: Apr 2013 Location: Podunk, Texas Posts: 776	Re: Intake and exhaust manifold When I replaced the manifold gasket on my ‘67 a few years ago (the manifold had never been off the truck - it has a good bit or rust on it too), I sprayed the bolts and nuts down with Aerokroil two or three times a day for three days...and didn’t break anything! I’ve heard that removing a bolt that breaks inside the hole is a real PITA.... __________________ "It is hard to search for a black cat in a dark room, particularly if it is not there. Especially if this cat is smart, brave, and polite." Sergei Shoigu, Russian Minister of Defense



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