Dustin,
All is not lost. I found the following in "California Bill" Fisher's 1955
GMC speed manual:
"In smoothing out the intake ports, you may "hole-through" one of the
head-bolt holes due to their very close proximity to the port wall
section. If you do, use a flat washer, well coated with Permatex, under the
head of that particular capscrew. This will prevent leaning-out of the
mixture, possible burning of a piston head or valve, or detionation
during full-throttle operation".
Jack / Winter Park FL
1951 GMC
----- Original Message -----
From: <CLLLSLS@aol.com>
To: <oletrucks@autox.team.net>
Sent: Saturday, May 13, 2000 12:30 AM
Subject: [oletrucks] Stupid porting mistake!
> Cleaning up my 270/H head and oops! Cut right into a head bolt hole
through
> the side of an intake port! I thought I was being real careful, I laid out
> lines across the manifold face of the head with dykem where all the edges
of
> the head bolt holes should have been, but must have had my square crooked
or
> something because I cut right into one! I've ported ALOT of heads, but
never
> have I screwed up like this!
>
> I'm wondering what I should do here, If anything. I'm thinking if the hole
> needs repaired, I can put a copper rod inside the bolt hole and Ni-Rod
over
> the hole then smooth it back out again on the inside and remove the copper
> rod and ream the hole. But is it a problem? The boost pressure (engine is
> turbocharged) in the runners can't really go anywhere. The bottom of the
> head bolt hole is sealed by the head gasket and the top should be sealed
by
> the nut on the head stud.
>
> What should I do?
>
> Dustin
> 50 & 53 GMC 1/2 tons
> 48 GMC 3/4 ton
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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