3B water manifold/head info requested

auditude at cox.net auditude at cox.net
Mon Oct 14 19:45:17 EDT 2002

Bernie Benz b.m.benz at prodigy.net wrote:
> Ken, Your primary copy of this e-mail was returned to me because of bad
> address??  You'll see it on the list, but what's wrong?

Yeah, I had some issues.  It's fixed now.

> I have a loose 3B water outlet manifold, 034 121 193A, that is destined to
> go into my 7A upgraded to 3B externals project, that I could loan to you for
> a short time to use as a pattern.  Adapting the 7A head to accept it would
> require boring the additional 3 20mm water passage holes and their
> respective single tapped mounting holes for each.  The additional water
> passage holes are O-ring sealed with the O-ring positioned on the mating
> manifold projections fitting into the head bores, so will only require a
> straight thru bore.  This water manifold would interfer with the 7A intake
> manifold, why it is not used thereon.

Okay, so I already have one of the 4 holes?  The water manifold adds three more holes, and one of the ports on the manifold mates with the existing hole I have?  If so, that is very good as it will help determine placement of the remaining holes.

I appreciate the offer, but let me see if I can locate a stock manifold first.  Thanks for the part number too.

I was thinking I would really prefer a head to measure over the manifold, since I could have the manifold installed on the head in some slightly incorrect location.

Hey, what's that funky-shaped hole on the intake side of the head, at the bottom towards the middle/front?  It's flat on the bottom and is almost pyramid-shaped, but the two top lines are concave.  I don't have the head in front of me right now, maybe it's the water port (not thinkin' so).

Bernie, when are you going to have this procedure done to your head?  Do you have a shop picked out already?  Are you getting a valve job done as well?  I would like to find a shop to do mine, but I'm scared to go to any old machine shop.  I'd prefer a shop with Audi or VW experience.  Also, I think the cost can have a pretty wide range for this type of stuff.

It would be pretty reassuring for me to have the shop that did your conversion, do my conversion.  No need for me to blaze trails with a separate shop, I think I'd rather pay shipping.  But then again, if they take and keep good measurements of what they do, then maybe that could be used at another shop without much risk.



From: <auditude at cox.net>
> >
> > I would like to find out as much as I can about the water manifold on a 3B
> > head.  Does anyone have any dimensions or pictures of the manifold and the
> > ports in the head?
> >
> > I am thinking of converting a 7A head to have 4 water intake ports like the 3B
> > head.  Currently it has one, and people say that the (main/only) difference is
> > that the 3B head has ports for the water manifold.
> >
> > I have decided that I don't have to modify the head to actually use the
> > factory manifold.  I can probably get away with machining some port and
> > threading in some aftermarket fittings and create an external manifold that
> > would do the same thing.  I would just need to understand where the underlying
> > water passages are.
> >
> > If I go the path of fitting a factory 3B water manifold to the head, then this
> > information could be used for other 3B owners wanting to be able to use the
> > more plentiful 7A heads for repairs or upgrades.
> >
> > So, any help would be appreciated.
> >
> > I doubt anyone might have one, but if there are any junk 3B heads around that
> > I could borrow or have to take measurements, that'd be great.  :-)
> >
> > Thanks,
> >
> > Ken

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