[Healeys] PCV valve installation

Sat May 15 13:36:27 MDT 2021

Ok after a lot of searching and receiving similar PCV parts, yet not
close.  I finially got a original pvc valve PC727 only to find out that
it's the same as a NAPA product that I already had.

On Wed, Apr 28, 2021, 6:16 PM healeyguy--- via Healeys <
healeys at autox.team.net> wrote:

> As mentioned in an earlier email , the stock 100 setup does vent the
> internal crankcase areas to the atmosphere but only when the car is moving
> forward. On many early cars the draft tube was the solution. Some cars even
> had enough engine compartment air movement via the rad fan to activate the
> process..  The 100 did not have a lot of CFM from the stock fan.
> The draft tube does make a "negative pressure" at the tip as the air moves
> under it thus reducing crankcase pressure but when you slow down or stop in
> traffic that negative pressure goes away. Using manifold pressure was a
> better solution to meet the early pollution control regulations.
> P
>
> -----Original Message-----
> From: Michael Oritt via Healeys <healeys at autox.team.net>
> To: Michael Salter <michaelsalter at gmail.com>
> Cc: Healey List <healeys at autox.team.net>
> Sent: Wed, Apr 28, 2021 5:33 pm
> Subject: Re: [Healeys] PCV valve installation
>
> Michael--
>
> As I suspected. Why then doesn't the 100's stock vent tube setup serve as
> a sort of PCV valve in that it lowers crankcase pressures though it does
> not recirculate gasses into the engine versus the environment?  How
> different in effect is the venting of positive pressure to the atmosphere
> versus negative pressure created by the PCV circuit?  Wouldn't the vent
> tube's being open to atmosphere decrease the chance of blow-by out the rear
> of the engineer into the bell housing?
>
> Best--Michael Oritt
>
> On Wed, Apr 28, 2021 at 4:52 PM Michael Salter <michaelsalter at gmail.com>
> wrote:
>
> "must it be blocked off in order to create the vacuum sought?"
> That's what I did on my yet to be tested system using a brass plug with an
> "O" ring on it.
> [image: image.png]
>
> Stay tuned for results :-)
>
> M
>
>
> On Tue, Apr 27, 2021 at 8:25 PM Michael Oritt via Healeys <
> healeys at autox.team.net> wrote:
>
> Though I am not that familiar with Healey 6 engines I do not believe they
> have the block vent pipe fitted to 100's which has positive pressure coming
> out of it with engine running.
> How does the presence of such a pipe affect the design of a PCV system
> such as that illustrated--must it be blocked off in order to create the
> vacuum sought?
>
> Best--Michael Oritt
>
>
> On Tue, Apr 27, 2021 at 7:33 PM Roger Grace via Healeys <
> healeys at autox.team.net> wrote:
>
> I am with Harold on this one. In theory, with substantial vacuum holding
> in the CC you would not move any of the accumulated gasses and moisture
> from the CC. Would be interested to hear if anyone has actually measured
> the CC vacuum after the plugging and soldering of all the orifices ?
> Particularly at idle when the vacuum is high - what does the PCV valve
> regulate it to ? My car is about 17/18 ins Hg at idle. Would also be
> interesting to look for oil at the system vacuum inlet pipe after a few
> miles.
> Just wondering...
> rg
>
>
>
>
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>
> On Tue, Apr 27, 2021 at 8:42 AM Harold Manifold via Healeys <
> healeys at autox.team.net> wrote:
>
> The V in PCV is for ventilation. There should be a way for fresh air to
> get into the engine. In addition to creating a slight vacuum inside the
> engine ideally the blow by gases that accumulate in the bottom of the block
> and contaminate the engine oil should be replaced with clear air.
>
> [image: Foxbody PCV Valve Replacement – Fox Body Project]
>
> Harold
>
> *From: *Bob Begani via Healeys <healeys at autox.team.net>
> *Sent: *Tuesday, April 27, 2021 6:06 AM
> *To: *Bob Haskell <rchaskell at earthlink.net>; Healey List
> <healeys at autox.team.net>
> *Subject: *Re: [Healeys] PCV valve installation
>
> Bob:
>
> Let me know how your installation works with the hole in the oil fill cap
> soldered.  No doubt, the rest of the engine is has no breather inlets such
> as the valve cover?  The reason I ask is I did not solder or seal the oil
> fill cap and my aluminum valve cover has  a vent on the side into which I
> stuffed a piece of oiled 3m sanding pad.  The reason was that in the early
> days of PCV valves on engines the car makers were creating a breather so
> fresh air could circulate in the engine and some articles indicated it was
> desirable to keep air flowing to the crankcase.
>
> Maybe some of the other listeners who have been using a PVC system sealed
> could comment on the operation.  Currently on regular 25-mile drives at no
> more than 60 mph the drips under the bell housing weep hole after the ride
> are limited to a spot the size of a quarter in the can underneath.  Next
> time travel on I-75 for 50 miles at higher speeds I will see if the amount
> of oil increases.  If it does I may seal vent to see what happens.
>
> Bob Begani
>
> -----Original Message-----
> From: Bob Haskell <rchaskell at earthlink.net>
> Sent: Monday, April 26, 2021 8:23 PM
> To: rfbegani at gmail.com; 'Healey List' <healeys at autox.team.net>
> Subject: Re: [Healeys] PCV valve installation
>
> Bob,
>
> Thanks for the info.  I've got mine installed, but haven't driven the car
> yet - rebuilding a LCS pump for it.  I machined a 5/8"-20 - 3/8"
> barb fitting to screw into the front manifold. Added six flats for a
> wrench - Whitworth so I can be annoyed with myself at some future date.
> To go from the 5/8" diameter on the valve cover tee to the 1/2" diameter
> inlet on the PCV valve, I shaved the ID of a 5/8" hose and the OD of a 1/2"
> hose on the lathe and glued them together with rubber cement.  3/8"
> hose connects the PVC valve to the manifold fitting.  Added hose clamps at
> each connection and soldered the hole in the oil fill cap.
>
> Cheers,
>
> Bob Haskell
> Austin Healey 3000 BN7/BT7 registrar
>
> On 4/26/21 6:00 PM, rfbegani at gmail.com wrote:
> >
> > Bob:
> >
> > I have completed the PCV valve installation by using a 3 inch piece of
> > the 5/8” hose on the manifold side and inserting a 5/16 “ heater hose
> > into it with a hose clamp.    Then the 5/16” hose attaches a 1/8” x ¼”
> > brass fitting with a hose clamp from the parts store I installed into
> > the small opening on the intake manifold to the right of the large
> > opening for the brake booster.  No leakage and strong negative
> > pressure have reduced my oil leaks into the bell housing and the
> > clutch dramatically.
> >
> > Bob Begani
> >
> > *From:* Healeys <healeys-bounces at autox.team.net> *On Behalf Of *Bob
> > Haskell
> > *Sent:* Friday, April 9, 2021 3:10 PM
> > *To:* Healey List <healeys at autox.team.net>
> > *Subject:* [Healeys] PCV valve installation
> >
> > Listers,
> >
> > Attempting to install a PCV valve on our tri-carb engine per Norm
> > Nock's Tech Tip (page 98).  Made an adapter (5/8"-18 to 3/8" barb)
> > that replaces the plug in the front inlet manifold.  3/8" hose to the
> > PCV valve.  Two questions:
> >
> > 1) Does the PCV valve need to be orientated in a particular way?
> > Norm's diagram shows it horizontal and I have seen them on non-Healeys
> > vertical (engine side down).
> >
> > 2) The valve cover tee is 5/8" diameter, the engine side of the PCV
> > valve is 1/2".  Anyone know of a short hose with different diameters
> > on each end?
> >
> > Thanks.
> >
> > Cheers,
> > Bob Haskell
> > Austin Healey 3000 BN7/BT7 registrar
>
>
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