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#15433 10/13/2003 1:31 AM | Joined: Jul 2003 Posts: 33 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2003 Posts: 33 | I have a 1949 3600 with a 235 6cyl. I had valve job done on the head. In the process of putting it all back together we've noticed a .005-.010" gap between the exhaust manifold and the head on one of the ports. I had the manifold re-ground but it didn't improve the fit. Is the gap a problem? Any suggestions on fixing it?
Thanks for the help!
Dierks321 | | |
#15434 10/13/2003 2:19 AM | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | dierks321,
Did you install the three metal alignment rings between the intake ports in the manifold and the head? If yes, you might need to grind the rings down a little to make up for material removed from grinding the manifold and/or head mating surface(s).
Also, the thichness of the original manifold gasaket was almost twice that of gaskets now sold (I know this from a NOS set of original gaskets). You could try using two manifold gaskets (and maybe use the hi-temp copper-colored gasket seal available at auto supply stores).
Tim | | |
#15435 10/13/2003 2:55 AM | Joined: Jul 2003 Posts: 38 Apprentice | | Apprentice Joined: Jul 2003 Posts: 38 | Dierks 321
You didn't mention if you had the intake ground. I had the same problem with my 228 GMC. I made sure that I had a good fit between the intake and exhaust part of the manifold, and bolted it together. Then had the intake and exhaust manifold milled as one unit. I did grind the 3 steel rings down to allow for a true flat fit. It worked great, no intake or exhaust leaks. Also used a new fel-pro gasket.
Jim
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#15436 10/13/2003 2:57 AM | Joined: Jul 2003 Posts: 38 Apprentice | | Apprentice Joined: Jul 2003 Posts: 38 | Dierks 321
You didn't mention if you had the intake ground. I had the same problem with my 228 GMC. I made sure that I had a good fit between the intake and exhaust part of the manifold, and bolted it together. Then had the intake and exhaust manifold milled as one unit. I did grind the 3 steel rings down to allow for a true flat fit. It worked great, no intake or exhaust leaks. Also used a new fel-pro gasket.
Jim
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