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Re: head gasket, any mods while I am in there?
On Sat, 6 Jun 1998, James Fawcett wrote:
> there. It is an 86 5kTQ. I thought about porting and polishing the head
> and the intake manifold. Anyone have any experience? What about bigger
Well, I am replacing my 5KCSTQ's head gasket too. I figure that 200,000
miles on the original head gasket with the last 40,000 at 15+psi boost
isn't too bad. :-) I decided against using my original head because
although the head was within spec, it had cracks between the valves in 3
of the 5 cylinders. They were hairline, but tyhey were there. So I got
the head off my 5000s parts car and it was in perfect shape. I figured
I'd do only some minor "cleaning up" of the ports to smooth the airflow
ever so slightly, but I found out that the exh ports were _much_ smaller
than the gasket so I gasket matched the exh ports. I also cleaned off all
the flash and casting roughness. I don't have any flow bench numbers, but
my "engineering" sense tells me that this head will flow much better now.
(or rather, it better flow better after all that work!) I am using stock
sized valves as my budget is already being pushed to the limit.
> costly, how much $ etc??? Any help would be great. I think I am gonna
If you already have a hand grinder and air compressor, then it doesn't
cost much more than some time to polish the ports. I use the sandpaper
rolls like Eastwood advertises and a carbide burr for the rough stuff.
It makes quite a mess though.
Graydon D. Stuckey
"There's alot more to Jazz than just wrong notes"