I faced a similar problem on my MGB, for a different reason. I didn't want
to vent my crankcase through the carb bodies, and I didn't have the original
anti-backfire valve. So, I ran a line from the crankcase, or in your case,
the valve cover, to the intake manifold. In between I used an inline PCV
valve from an engine of similar displacement. I simply went to the autoparts
store, and went through their inventory, seeking to match up engine
displacement, inlet and outlet hose sizes. With a few pieces of hose and
some plumbing fittings, using existing holes in the intake manifold,
everything is just dandy, some 20 years later. And it passes smog check. You
would have to drill and tap a hole for a hose fitting in your valve cover,
and possibly in the intake manifold if there were no acceptable ports
available, but I don't know why it wouldn't be possible. The PCV is
important to keep the engine backfire from pressurizing the crankcase/valve
cover on overrun. If you don't want to go through at least that much,
routing a line to the air filters is one of the factory solutions, at one
stage of their evolution.
Michael Singleton
> OK Gang, here's the dilemma.
> My newly acquired '74 TR6 was outfitted by the previous owner with the
dual
> Weber down draft carbs and a nice alloy valve cover. So far so good. But,
he
> completely eliminated the PCV system, which makes for to much pressure
under
> the valve cover. This in turn makes the oil want to seep out under the oil
> filler cap.
> Any of you folks run into this problem?
> My first choice would be a vented and filtered oil filler cap. But, the
> alloy valve cover has as a 2" I.D. hole in the cap. A quick check of the
> parts catalog shows the biggest cap of this type is @ 1 3/4".
> Anyone have a source for these oversize filler caps?
> My next plan of attack would be to cast my vanity aside and remove the
fancy
> cast valve cover for the stock one sitting on my work bench. I can then
fit
> a vented cap. Next, I could fit a PVC valve to the vent hose on the valve
> cover.
> My next problem is where to plumb the opposite end of the PCV valve.
> Should I fit it to the it to the manifold? Or, should I use a "T" fitting
> and plumb it into the base of each air cleaner?
> Any suggestions would be welcomed.
> Paul Burr
>
>
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