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Re: Doesn't the arrow show indicate the one way flow Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: Doesn't the arrow show indicate the one way flow, Allan, Thu, 15 Feb 2007 13:13:14 Members do not see ads below this line. - Help Keep This Site Online - Signup |
That hose is not for oil to travel down to PCV box but for venting.
It's an intricate system where flow of air/vacuum is going in different direction depending on under load or deceleration.
So when the hoses are hooked up to the filler pipe and I blow in the end that's attached the pipe coming around the valve cover, the air is diverted to the filler pipe and the lower check valve closes.
If I apply suction in that same hose end, the check valve to filler pipe closes and the lower one open allowing some air to vent out of PCV box.
Anders
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