<html><body>From what I recall from my Smog Class days (I had a smog license to repair systems), this is the basic "Type 3" system. To upgrade '50-'60s vehicles you punched a hole in the air cleaner (some oil bath), added a fitting and hose, and plugged the downpipe tube from the crankcase with a rubber plug. It would then pass early emission tests.<div><br></div><div>This is basicly like the Healey system which was sans a PVC valve, but met early standards...not today, however. Multiple carbs gave the Healey an exemption in those days.</div><div><br></div><div>The big problem with this system is engine wear. When things like rocker shafts or bushings wear, the oil gap is enlarged allowing geysers to form in the valve cover, and then the oil gets sucked out to the air intake and sent out the exhaust. Folks thought the rings or bearings had failed and started an engine rebuild, when only the rocker shaft was the issue.</div><div><br></div><div>I tend to stick to originality, and just drive my stinky old Healey, which would never pass any standards nowadays. Hank<br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: "Harold Manifold" <manifold@telus.net><br>To: "Michael Salter", "Bob Spidell"<br>Cc: healeys@autox.team.net<br>Sent: Sunday January 31 2021 10:23:00AM<br>Subject: Re: [Healeys] BN1 PCV system<br><br>
<div dir="ltr" align="left"><span class="718150318-31012021"><font color="#0000FF" size="2" face="Arial">In
my opinion providing a dedicated air intake and
separating the streams is a step in right direction. This sketch
below is what I am planning. One possible addition would be a
simple air oil separator on the return line but I am hesitant
to add too much strange looking hardware if it can be
avoided.</font></span></div>
<div dir="ltr" align="left"> </div>
<div dir="ltr" align="left"><span class="718150318-31012021"><font color="#0000FF" size="2" face="Arial">I
would appreciate any feedback and comments.</font></span></div>
<div dir="ltr" align="left"> </div>
<div dir="ltr" align="left"><span class="718150318-31012021"><font color="#0000FF" size="2" face="Arial">Harold</font></span></div>
<div dir="ltr" align="left"> </div>
<div dir="ltr" align="left"><span class="718150318-31012021"><img border="0" hspace="0" alt="" src="/index.php/inbox/attachment/filenameOriginal/Possible%20PCV%20System.JPG.jpg/filenamefs/INBOX44952b2b340d571f75e68368c0eee53efc7b0"></span></div>
<br><div lang="en-us" class="OutlookMessageHeader" dir="ltr" align="left">
<hr><font size="2" face="Tahoma"><b>From:</b> Healeys
[mailto:healeys-bounces@autox.team.net] <b>On Behalf Of</b> Michael
Salter<br><b>Sent:</b> Sunday, January 31, 2021 9:41 AM<br><b>To:</b> Bob Spidell<br><b>Cc:</b> healeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] BN1 PCV system<br></font><br></div>
<div>I have decided to cut some "plugs" out of a chainsaw foam air
filter and insert them into the rocker cover hose. I'm thinking
that flow in that hose will be the source of intake air into the
engine.
<div><br></div>
<div>M</div>
</div>
<br><div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Sat., Jan. 30, 2021, 8:45 p.m.
Bob Spidell, <<a>bspidell@comcast.net</a>>
wrote:<br></div>
<blockquote class="gmail_quote" style="padding-left:1ex;border-left:#ccc 1px solid;margin:0px 0px 0px .8ex;">
The best place for a fresh air source would be a small filter on
the oil<br>
filter cap. Obviously, not an easy thing to rig up. Or, you could
put a<br>
tube on the backside of one of the carbs, but you'd want a better
filter<br>
than the stock grasshopper-stoppers.<br><br>
On 1/30/2021 3:48 PM, Harold Manifold wrote:<br>
> I am also looking into a PCV system for my BT7 as well. Most
of the PCV<br>
> systems I have seen on Healey's don't have a filtered fresh
air intake and<br>
> don't have much ability to replace the blow by and other
nasty's that will<br>
> accumulate in the bottom of the block. To have air changes in
the bottom of<br>
> the block a filtered fresh air source is needed and slight
vacuum to draw<br>
> out anything that accumulates. Ideally the fresh air would
come in at one of<br>
> the block and the bad air leave at the other end. There is a
connection<br>
> between the tappet section and the bottom of the block but
this is also the<br>
> oil return. (A BN1 engine may be different) A PCV can be used
to control the<br>
> system but if the air circulating bypasses most of the engine
then the<br>
> system is less effective. On V8 engines the clean air comes in
through one<br>
> valve cover, passes through the bottom of the block and then
exists via the<br>
> other valve cover drawn by vacuum from the intake.<br>
><br>
> Any good ideas where to locate a filter fresh air source?<br>
><br>
> This website has excellent information on PCV valves and is
where I found<br>
> the attached article by Tony Ball.<br>
><br>
> <a href="http://mewagner.com/"></a><a href="http://mewagner.com/">http://mewagner.com/</a><br>
><br>
> Harold<br>
><br>
><br>
><br>
> -----Original Message-----<br>
> From: Healeys [mailto:<a>healeys-bounces@autox.team.net</a>] On Behalf Of Bob<br>
> Spidell<br>
> Sent: Saturday, January 30, 2021 2:41 PM<br>
> To: <a>healeys@autox.team.net</a><br>
> Subject: Re: [Healeys] BN1 PCV system<br>
><br>
> Looks clean, Michael. I am considering similar for my BN2 (but
I plan to fab<br>
> a plate with an elbow to replace the road draft tube). If you
plug the valve<br>
> cover vent, you'll have a 'system' similar to what I have on
my BJ8, which<br>
> is an updated version of the original Norman Nock design.<br>
> This isn't really a PCV system, as the crankcase and valve
cover will be<br>
> under continuous vacuum. I suspect some air is drawn in from
the rear<br>
> 'seal,' which is not filtered but helps to alleviate the
infamous Healey<br>
> bellhousing drip, and likely doesn't affect mixture all that
much. If you<br>
> leave the vent open--I'd put an air filter on it--you'll have
a genuine PCV<br>
> system as air will be constantly circulated through the
crankcase and top<br>
> end. This is what I plan to do, but my 100M is vented to the
CAB, for which<br>
> I have a large K&N filter on the intake duct in front of
the radiator.<br>
><br>
> Which PCV valve did you select?<br>
><br>
> Bob<br>
><br>
><br>
><br>
> On 1/30/2021 12:20 PM, Michael Salter wrote:<br>
>> After months of deliberation I have constructed this PCV
system for my<br>
>> BN1.<br>
>> The original road draft tube has been plugged just below
the PCV valve<br>
>> takeoff.<br>
>> Of importance was that the system would be almost
impossible to see<br>
>> without very close inspection.<br>
>> I'm still trying to decide if I should plug the normal
valve cover<br>
>> vent or leave it open to serve as the PCV system
intake.<br>
>> Thoughts?<br>
>><br>
>> M<br>
>><br>
><br><br>
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