I think "decrease in manifold depression" mean more vacuum. You might try
replacing the pcv valve or maybe the diaphragm if available. Its possible
that valve guides could be worn as I don't think that would necessarily
effect compression. At some point, you should see some smoke out the
exhaust. When my 71BGT was burning oil at a similar rate, I did get some
improvement after I had the valve guides knurled. However, the other prior
symptom besides the oil consumption was a brief puff of smoke whenever I
shifted gears.
On my former 65B, I had problems with the PCV. The cover would fall off,
followed by serious smoke out the exhaust. I'm not sure the consumption
because I always notice it right away and was able to recover the cover and
clip. But I'm sure than any mosquitos within a 200 foot range were killed
instantly.
David
At 09:37 AM 3/6/2004 -0600, MonteMorris wrote:
>I'm experiencing a high oil consumption (200 miles/qt) in the 67B(hasn't
>been driven since November). Since the compression tests are good, several
>have suggested the PCV valve may be the problem.
>In reading about oil consumption problems on the British Automotive website
>and trying to decipher the "mechanic language", I find the following
>statement:
>"The PCV valve diaphragm varies the opening to the inlet manifold according
>to the depression or crankcase pressure acting upon it. With a decrease in
>manifold depression or an increase in crankcase pressure, the diaphragm
>opens the valve allowing these crankcase gases to be drawn into the inlet
>manifold."
>Does a "decrease in manifold depression" mean less vacuum?
>Thanks,
>Monte
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