[Healeys] Fwd: 100 air cleaners.

[Michael Salter]

Yes Alan, absolutely correct.  Depending upon where you clamp the element
there can be a VERY small orifice which, with that backplate, was probably
sufficient to produce the stain.
Frankly I'm stunned that this would have got by "Engineering ".
If it wasn't for the fact that I have fitted a PCV system to this engine I
would most definitely be taking steps to correct the situation.

M

On Thu., Aug. 10, 2023, 8:19 a.m. Alan Seigrist, <healey.nut at gmail.com>
wrote:

> looking at your picture of the filter assembly backplate it seems like
> there is a little bit of oil blowby inside of the seal, so the filter
> itself probably sits up just enough for air to get by.  Eitherway, looks
> like a nice way to maximise oil leaks!
>
> On Thu, Aug 10, 2023 at 1:51 AM Michael Salter <michaelsalter at gmail.com>
> wrote:
>
>> Okay,  so back to the original question.
>> How come the filter blocks off the engine breather tube?
>>
>> M
>>
>> On Wed., Aug. 9, 2023, 12:01 p.m. Jean Caron, <
>> vintage_roadster_restoration at hotmail.com> wrote:
>>
>>> Michael,
>>> I have the same type of elements in the BN2 I am currently restoring.
>>>
>>> Jean
>>>
>>>
>>>
>>> Sent from my Bell Samsung device over Canada’s largest network.
>>> ------------------------------
>>> *From:* Healeys <healeys-bounces at autox.team.net> on behalf of Michael
>>> Salter <michaelsalter at gmail.com>
>>> *Sent:* Wednesday, August 9, 2023 7:11:33 AM
>>> *To:* healeys at autox.team.net <healeys at autox.team.net>
>>> *Subject:* [Healeys] Fwd: 100 air cleaners.
>>>
>>> Hi John,
>>> This is the element that I'm talking about.  It is a cleanable type and
>>> is what was in this car with less than 30K miles.
>>> The elements have a "rubber" ring on each side and the filter medium in
>>> somewhat like a pot scrub.
>>> Is that not the original type?
>>> M
>>>
>>> On Wed., Aug. 9, 2023, 5:02 a.m. john harper, <ah100tech at gmail.com>
>>> wrote:
>>>
>>> Michael
>>>
>>> I cannot be sure but it looks as if this is fitted with a dry filter
>>> element. The originals had an oil-wetted element that had to be washed out
>>> in paraffin from time to time and then re-wetted. Rather messy.
>>>
>>> I don't have a filter to hand but perhaps the wetted type did not block
>>> the breather pipe.
>>>
>>> All the best
>>>
>>> On Wed, 9 Aug 2023 at 05:22, Michael Salter <michaelsalter at gmail.com>
>>> wrote:
>>>
>>> This picture shows an original BN1/2 front air cleaner back plate and an
>>> original air filter element.
>>> Interestingly when this unit is assembled the "O" ring of the element
>>> almost completely blocks off the engine breather tube in the back plate
>>> which renders the engine breather system inoperative.
>>> Bit odd?
>>>
>>> M
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