[Healeys] PCV valve installation

Michael Salter michaelsalter at gmail.com
Sat May 15 14:39:51 MDT 2021 

Nor sure that this pic came through.

On Sat., May 15, 2021, 4:30 p.m. Michael Salter, <michaelsalter at gmail.com>
wrote:

> Well I  finally got to test my PCV system on my 100.
> Unfortunately the results were only a qualified success.  I used V408 as
> fitted to a 2006 Pathfinder.
> This is a horizontally installed spring loaded PCV valve and that is how
> it is in my system.
> The nice feature of the installation is that it is almost impossible to
> see.
> This pic shows the assembly before fitting and painting.
>
> [image: image.png]
> It is interesting to note that the angle cut on the end of the road pipe
> (which I have blocked off with a brass plug) is cut the wrong way to
> produce a  Bernoulli effect but that is how it was originally.
> I removed the dipstick and installed a tube leading to a manometer inside
> the car. My buddy watched the manometer while we did an extended test drive.
> Most of the time during normal cruise the manometer showed about 8" of
> water depression in the crankcase, which would be ideal, however it was
> inconsistent.
> Sometimes, particularly after a short burst on the the throttle, the
> manometer would show 10 or more inches of pressure in the crankcase for a
> considerable period of time which was only converted to a depression after
> closing the throttle momentarily .
> On average there was some degree of depression in the crankcase but the
> engine still deposited its customary "mark" when I stopped.
> Results inconclusive... more study required.
>
> M
>
>
>
>
>
>
> On Sat., May 15, 2021, 3:37 p.m. Tom Mitchell via Healeys, <
> healeys at autox.team.net> wrote:
>
>> 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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