Kevin,
The 69 is a (semi) open breathing system. Sometime late in
the Mk1 (or perhaps during the Mk2) production The blow-by
pipe port was closed up (on the right side of the engine
below the manifolds and toward the rear). This allows the
pressure to build up and need to be vented by the tube that
was installed on the valve cover. On most engines it was
put into the carbs and later in that strange valve that is
on the intake manifold.
If you want to really open it up, you can read the treatise
I wrote on the subject. It can be found on Tom Shirley's
Tips archive site, "The Spitfire Garage".
Regards,
Joe Curry
Kevin Rhodes wrote:
>
> I have been following all of this back and forth on crankcase breathing
> with interest. I have a 69 1296 - dual SU's, nothing vaguely resembling
> emissions controls - in my car. All I have is a hose coming out of the
> valve cover routed into the frame rails. What is else is there SUPPOSED to
> be? Or is a 69 still an "open" engine? I don't have oil gushing out the
> dipstick tube, though I do seem to have a bit of a leak around the front
> seals, not a gusher, but noticeable.
>
> I do like the look of that spiffy catch tank - I think I will order one up.
> Can't have tooo much polished alloy under the hood! ;-)
>
> Kevin Rhodes
> Portland, Maine
> Freddy the Spit
>
> At 12:13 03/22/2000 -0500, Transmancat@aol.com wrote:
>
> >Hi Guys
> >At the risk of being commercial (which I do not want to do!) If you have a
> >breather problem you might like to check out our solution.
> > <A HREF="http://www.waterloo-dtr.com/";>WATERLOO DRIVETRAIN SYSTEMS</A>
> >
> >Regards,
> >John J, Black
> >http://www.waterloo-dtr.com
> >Agents for Vicarage Jaguar
|