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| Re: [GMCnet] Got the Olds aluminum intake for my 403. No modifications will be needed. [message #312090 is a reply to message #312080] |
Fri, 13 January 2017 09:33   |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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James Hupy wrote on Thu, 12 January 2017 21:30Bob, make really, really, sure that you get all those beads out of that
manifold. Bad juju happens when those things encounter cylinder bores and
moving pistons.
Jim Hupy
Salem, Or
78 GMC ROYALE 403.
On Jan 12, 2017 7:04 PM, "Bob Dunahugh" wrote:
As to places that things bolt on. Or the pipe threaded holes. It's a
perfect match. Did the first cleaning this afternoon. Looks great. But
tomorrow I'll put the stainless steel beads to it. That will take care
of any stains to the aluminum.
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Bob,
I'm with Jim on this. A few stains...no big deal. Beads in your engine...big deal. Personally I would not even chance it. I fella I know rebuilt his SMC and as a part of the process, bead blasted his rocker covers, just so he could paint them and look nice. 10 minutes into the run-in, knock ...knock...knock. Took out the new motor. That stuff gets into places where you can't get them out. JMHO....based on observed bad experience.
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] Got the Olds aluminum intake for my 403. No modifications will be needed. [message #312111 is a reply to message #312079] |
Sat, 14 January 2017 00:34 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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The stainless steel beads are about .030 inch. Next the manifold goes into the hot tank for about 15 mins. Then put to the HOTZ after using long brushes on the inside. Then run a camera in the runners. This is how I clean my race engines that often hit 8,000 RPM's. As at that speed, and RPM's. Failure IS NOT an option with someone on you back bumper. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Thursday, January 12, 2017 9:03 PM
To: gmclist@list.gmcnet.org
Subject: Got the Olds aluminum intake for my 403. No modifications will be needed.
As to places that things bolt on. Or the pipe threaded holes. It's a perfect match. Did the first cleaning this afternoon. Looks great. But tomorrow I'll put the stainless steel beads to it. That will take care of any stains to the aluminum.
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