My "proper" method for installing the intake end gaskets is as
follows....Clean the block surface to bare metal and clean with contact
cleaner.....apply a conservative amount of contact cement or "gorilla
snot"(super weatherstrip adhesive)......put a small dab of high temp
silicone in each of the four corners......install the cork gaskets and
press firmly to set the adhesive....important-let the adhesive dry for
about 5 minutes.....apply another dab of silicone to the four corners,
on top of the cork-in the corners only......install the manifold-use
four alignment studs if you are not confident in aligning the
manifold.....If you used the proper dap of silicone (in the corners
only) then a small amount will squeeze out when you torque the
manifold. I also cut a small piece off of the tab corners of the cork
gasket. Cut it at an angle that matches the angle of the cylinder head
to block angle.
Chris in Trinidad
Pete Stanisavljevich wrote:
>
> In addition to Mr. Cullen's excellent advice, I'll add this suggestion:
>
> I have used four pieces of threaded rod that matched the manifold bolts as
> guides. Cut 4 pieces, each about 3"-4" long and screw them into the manifold
> bolt holes on the head. Don't cut the heads off of old manifold bolts, as they
> won't be long enough to have something to grip on to get them out, once the
> manifold is in place.
>
> With the guide rods in place, slide the manifold down over them. The guides
> align the manifold and prevent shifting, which causes the leaks. When the
> manifold is bedded, insert a few 'real' manifold bolts and remove the guides.
>
> One thought on silicone sealants - I have seen a number of engines where the
>oil
> pick-up is clogged with strands of silicone rubber that had fallen off. A few
> years ago I began using the line of Yamaha motorcycle sealants (brand name
> 'Yamabond') on my engine products and have had much better results that what I
> had with permatex products. Does the phrase "Leak free British Motorcycle"
>mean
> anything?
>
> Regards
>
> Peter S.
> B9471799
>
> Bennett Cullen-P21988 wrote:
>
> > In response to Bob:
> > ?After these two gaskets are securely in place, then you can put some
> > silicone,
> > ?Permatex, or whatever you like on the top surfaces, especially at the four
> > ?interlocking joints, just before you install the manifold.
> > In a book I read, I believe it was "Rebuilding Your Small Block Ford" there
> > was a recommendation to put a double row (side by side) of sealant(s) across
> > the ends. One of RTV (silicon rubber) and the other one of Permatex (thick
> > dark brown or black goo in a tube). Set the manifold on gently, wiggle it a
> > bit, start the bolts, but do not snug them down for 24 hrs. I followed this
> > recommendation and have not had any leaks (yet).
> > Cullen Bennett
> > Tempe, Arizona USA
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