Re: Valve cover vacume line to - Saab 9000 Bulletin Board - Saabnet.com
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Re: Valve cover vacume line to
Posted by Alain(Luxembourg) [Email] (more from Alain(Luxembourg)) on Mon, 8 Oct 2001 16:26:27
In Reply to: Valve cover vacume line to, Jeff La Fleur, Mon, 8 Oct 2001 16:08:22
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The valve is called PCV-(Positive crankcase ventilation)valve. It's a check valve and should allow vacuum to pass (so the oil fumes from the crankcase can be thrown into the throttle body and burned) but should not let boost pressure pass. If the pressure gets into the engine via this line this can blow the hose but also the engine seals, causing severe oil leaks. The valve can easily be tested : it should only allow air to be sucked but should be tight under pressure. Just pull the vacuum line from the throttle body.If the valve is installed correctly and working you should be able to suck some air through the line but not to blow towards the valve cover.
HTH
Alain
posted by 194.235.19...
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