[Healeys] PCV installation BJ8

[Michael Salter]

Well the system that I installed on my BN1 using a Toyota Pathfinder valve
was somewhat effective but certainly not perfect. Not easy to see in the
attached pic.
I found that at normal cruise the ccp ranged between +2" and -3".
Lifting off the throttle momentarily would establish the -3" pressure which
would hold until the engine was taken back to idle. After that the pressure
would fluctuate as one accelerated through the gears then establish at
around 0 in at steady speed until the throttle was closed, then back to -3".
I'm fairly sure that these figures are a consequence of the type of PCV
valve used but it is impossible to get specific information about various
valves.
M

On Tue., Mar. 22, 2022, 12:00 p.m. Bob Spidell, <bspidell at comcast.net>
wrote:

> Hmmmmm ... looks like the hard plastic tube you get with oil suction
> pumps. So, what does it reveal?
> bs
>
> On 3/22/2022 8:52 AM, Michael Salter wrote:
>
> It's actually quite easy to test on the highway.
> I made this very basic manometer and plugged the end of the tube into the
> dipstick hole.
> Drive around with a passenger watching the displacement of the water in
> the tube ...  very revealing.
>
> M
>
> On Tue., Mar. 22, 2022, 11:15 a.m. Bob Spidell, <bspidell at comcast.net>
> wrote:
>
>> I started with the BCS kit, so I have the sealing washer on the dipstick,
>> and I put a screw in the hole in the oil filler cap (I didn't think solder
>> would stick on the oily cap, and I wanted 'reversible' at the time). At
>> idle, you can feel a vacuum if you put the palm of your hand over the oil
>> filler hole (haven't tried it on the highway).
>>
>>
>> On 3/21/2022 10:43 PM, i erbs wrote:
>>
>> Did you do anything else? Just ran the pvc to the manifold? That's it?
>> What about the hole in the oil cap? I have a bj8 manifold on my bt7 engine.
>> I get a lot of blowby into my rear air filter. Had Rocker arm checked...all
>> good.
>>
>> Ira Erbs
>> 1959 AH 100-6
>> 1967 MGB
>> Milwaukie, Or
>>
>> On Mon, Mar 21, 2022, 5:31 PM Bob Spidell <bspidell at comcast.net> wrote:
>>
>>> Here's how my mechanic did it. Best to balance both carbs, but using the
>>> unused port on the manifold works OK too.  I ran that way for many
>>> years; the thread is some sort of Brit thread, I drilled and tapped it
>>> for an American one.
>>>
>>> On 3/21/2022 10:51 AM, Michael DiVito via Healeys wrote:
>>> > Planning to install a PCV on my BJ8 and having trouble finding the
>>> right hardware to connect to the manifold. The plug in the manifold where I
>>> will connect the PCV is 3/8” with a fine thread pattern. Does anyone know
>>> where I might purchase a suitable connector which has the correct 3/8”
>>> threaded end for the manifold connection and a 1/2” barbed end for
>>> connection to the PCV?  Also if anyone has already done a PCV install
>>> advice appreciated.
>>> >
>>> > Michael P. DiVito
>>>
>>
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