[Healeys] PCV valve installation

[Michael Oritt]

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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