[Healeys] crank case ventilation

[Bob Spidell]

BTW, if you're pulling a vacuum at idle your PCV valve is stuck open.


bs


Alan Bromfield wrote:
> FWIW the PCV fitting as described is definitely a truly closed system.
> The vacuum can definitely be felt when you open the oil filler cap or
> lift the dipstick off the sealing washer. Also when air is admitted in
> that way, engine revs increase slightly as the air gets drawn into the
> crankcase or rocker box and then imto the inlet manifold.
>
> I am surprised that this mod hasn't been adopted more widely. It is a
> major contribution to solving oil incontinence in our 'mature'
> engines.
>
> On 17 March 2010 13:21, Bob Spidell <bspidell at comcast.net> wrote:
>   
>> That type/size filter is usually used on a PCV-fitted car as an intake
>> filter on a valve cover.
>> One possible problem with the PCV retrofit on a Healey is the PCV valve is
>> usually fitted to draw gases through the 'T' fitting on the valve cover.  An
>> exactly correct PCV installation would have the T fitting removed and
>> something like this on the valve cover so air would be drawn in through the
>> valve cover and gases--including blowby and air from inside the valve cover
>> that gets pulled down the pushrod holes--to be sucked into the intake
>> manifold (i.e. a truly closed system).
>>
>> I've considered this for my car but haven't tried it.
>>
>>
>> bs
>>
>>     
>
>   


-- 
*******************************************************************
Bob Spidell           San Jose, CA            bspidell at comcast.net

*******************************************************************