Never had one, but that is an early PCV (Positive Crankcase Ventilation)
system. For a few years, they were required only for cars delivered in
California, and may even have been a dealer installed item. Basically, the
road draft tube was blocked off, and the crankcase vented to the intake so
the blowby and oil fumes would be sucked back into the engine and burned.
It's not real clear in the photo, but I believe there should be a
connection to the intake manifold vacuum too.
The early systems didn't work too well, especially once the engine was worn
enough to produce significant amounts of blowby. The best arrangement is
to have a breather with a separate filter, arranged so that fresh air is
drawn through the engine by the PCV valve and intake vacuum.
Randall
On Friday, April 30, 1999 5:54 PM, Douglas Hansen
[SMTP:dagger@ix.netcom.com] wrote:
>
> I have a really weird breathing system on my Spitfire Mk1.
> I talked to a few people and they had no idea what it was.
> I found a photo in the book Original Triumph TR.
> please look at this picture b/c it's exactly whats on my spit
> this pic is from TR4
> http://www2.netcom.com/~dagger/breather.jpg
> would anyone have this or has ever seen another?
> thanks;
> Douglas Hansen
>
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