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Re: [Healeys] Venting a PCV

To: "'Bob Spidell'" <bspidell@comcast.net>, "'Simon Lachlan'"
Subject: Re: [Healeys] Venting a PCV
From: "Team.net" <lawrence.swift@gmail.com>
Date: Wed, 1 Feb 2012 10:50:36 -0500
Look at Norm Nock's book of technical tips.  He tells you exactly how to do
it.

-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Bob Spidell
Sent: Wednesday, February 01, 2012 8:23 AM
To: Simon Lachlan
Cc: 'healeys'
Subject: Re: [Healeys] Venting a PCV

BJ8s, of course, have the wonderful 'log' intake manifold.  I ran my PCV
valve to the pre-existing, plugged port that 
was probably used for a vacuum gauge on other cars that used the same
manifold (?).  Anyway, the servo hose and the PCV 
valve go to the same place, no different than what you are suggesting, and I
haven't had any servo issues in (at least) 
30K miles.  Since both the servo and the PCV circuits are both more-or-less
under constant vacuum I don't see much risk 
of the crankcase gasses being back-routed to the servo.  Also, pretty much
every American car sold since, oh, 1970 or 
earlier has pretty much the same  setup, with the PCV and brake servo
getting vacuum from the manifold.

OTOH, some vehicles, like my Ford Ranger, are known for developing sticky
throttles from 'carbon' buildup in the 
manifold, likely due to the PCV valve dumping into the manifold.   That's
certainly possible with a PCV valve in a 
Healey, but I'll deal with it if and when it happens (carb/choke cleaner did
the trick for my Ranger).

Can't help on the plug.  If it's hollow, you may be able to drill a hole in
the center and 'collapse' the threads into it.

Bob



On 1/31/2012 10:43 PM, Simon Lachlan wrote:
> Following on from my recent PCV query......
>
> My 3000 is a MkII BT7, a Tricarb in fact. It's 3 inlet manifolds are
linked
> by a tube called, I think, a "balance pipe". My car is one of a few Mk II
> BT7s which has a factory fitted servo; this servo gets its vacuum via a
tube
> which goes into the "balance pipe" which is relevant because:-
>
> As yet I still cannot get the plug out of the front inlet manifold despite
a
> lot of penetrating oil and heavy action with an impact driver. Is there
any
> reason why I shouldn't vent my PCV into the balance pipe? Or will the oily
> gases find their way into the servo and gradually wreck it?
>
> Regarding the plug, that round screw headed item in the front inlet, is it
> solid all the way from the top down? Or is most of it hollow? It looks
> likely that I'll have to drill and tap it out and I wonder just much
> drilling is involved....
>
> Thanks,
>
> Simon
> _______________________________________________
>
>
>


-- 
*******************************************************************
Bob Spidell           San Jose, CA            bspidell@comcast.net

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