[Mgs] How to block this orifice

[Chris Attias]

What are the O.D.s of the flare of the fitting and the next bit? Dorman
sells rubber caps (5/8", 3/4", maybe others), and might have one that could
be slipped over the end and secured with a hose clamp. I found a few at
Summit Racing, sold as cooling bypass caps.

Plan B might be to cut off the flared bit and find a cap that fits that
part tightly.

Plan C would be cutting the fitting at the manifold, threading the hole,
and using a tapered plumbing plug.

Chris
'64 MGB

On Mon, Sep 8, 2025 at 12:50 PM dave northrup <dave at ranteer.com> wrote:

> This engine, once upon a time, had a weber.  The manifolds and
> carburettors have been switched out.  This manifold came from a later,
> pollution equipped car.  Bad choice on my part but at the time I didn't
> know better
>
> As you can see, there is crank case ventilation going on.
>
> I need to stop this hole.  The bolt in the hose will work for now but I
> need a prettier permanent solution.
>
> -----Original Message-----
> From: Larry Colen <LRC at red4est.com>
> Sent: Monday, September 8, 2025 12:53 PM
> To: dave northrup <dave at ranteer.com>
> Cc: mgs at autox.team.net
> Subject: Re: [Mgs] How to block this orifice
>
> Isn't that crankcase ventilation?
>
> On 2025-09-08 10:24, dave northrup wrote:
> > Early 5 main mgb engine, happens to be in an mga.   How do i plug this
> > orifice?  I had something sealing it,  but apparently that was not a
> > permanent solution _______________________________________________
> >
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> --
> Larry Colen  LRC at red4est.com http://red4est.com/lrc
> _______________________________________________
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