Bob, just using your answer to get my reply in, no flame or anything...
Howdy, ya'll. I just had my Torker II that I am converting to EFI media
blasted, not sand or glass bead. Looks like a dull grey finish. Nothing
seems to rub off and it does not feel gritty. Even at that, though, I am
going to paint the lifter valley side with glyptal (messy stuff, but nice
oil tight finish). I would thint that a good cleaning with a bore brush and
soapy water would be enough to cleanb ony loose particles out of the
manifold passage ways. As to repairing, why not just drill out the damaged
section, wand weld in a new piece. Not as if F4B's are rare or anything and
it could then be made to match the sender without any kind of kluge. After I
get my bungs welded in, I am going to try and anodize the manifold before I
paint the bottom.
mayf, the red necked ignorant desert rat in PAhrump
----- Original Message -----
From: "Bob Palmer" <rpalmer@ucsd.edu>
To: "Andy Walker" <awtiger@ix.netcom.com>; "Tiger List"
<tigers@autox.team.net>
Sent: Monday, September 03, 2001 6:25 PM
Subject: RE: Messed up F4B
> Andy,
>
> This reply is predictable to those on the List that are familiar with my
own
> experience with a bead-blasted intake manifold. Hopefully, you only bead
> blasted the exterior surfaces, otherwise you need to take extreme measures
> to ensure that all the media is removed from the surfaces that contact the
> oil, plus all the air intake passages that also provide a way for the
> abrasive glass media to get into your engine. I might suggest an acid
> treatment, muriatic acid (HCl) as a way to release the tiny chips of glass
> embedded into the aluminum. Better yet would be hydrofluoric acid,
followed
> by chromic acid, but you probably don't have access to that. You can get
> some aluminum prep at a paint store though; finishing up with this should
> leave the aluminum with a nice white appearance, although where it matters
> to the engine, you can't see it anyway. (Are you going to polish the top
> surfaces?)
>
> The F4B is a good intake and period too, so having a helicoil installed
> sounds like a good idea, and cheaper than buying a new Performer RPM too.
>
> Bob
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