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Re: Never understood the point of that valve Posted by Landjet [Email] ![]() ![]() ![]() In Reply to: Never understood the point of that valve, Barry, Thu, 19 Jan 2006 19:43:41 Members do not see ads below this line. - Help Keep This Site Online - Signup |
In small gas turbines used in aircraft for auxiliary power, we would make sure that there was a slight negative pressure inside the gearbox. Even set up a pressure differential switch to monitor it so it was always negative relative to the atmospheric pressure. This was to prevent the gearbox from expelling oil -- if the box is pressurized, it will force oil out and eventually lose it all leading to a catastrophic failure. Maybe that explanation will help you see the benefits of a proper PCV. My oil leaks either stopped, or were slowed to a minimum after I didn't have manifold pressure in the crankcase.
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