Question about 2004 Nissan Altima

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No vac. through pvc hose. results in crankcase pressure pushing oil from under valve cover gasket

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I generally clean out the passageway to the hose using a short piece of old speedometer cable on an electric drill and some carb cleaner. You may be able to find something similar like perhaps an old bike cable. Anyhow you need to clean it out in order to make it work. (make sure to replace or clear hose as well)

Posted on Jul 30, 2009

  • Richard Scordino Jul 31, 2009

    Perhaps you didn't understand my answer...When the hose becomes plugged with carbon and gunk, the pcv valve no longer can operate which permits crankcase pressure to build up causing the gaskets fo fail. Changing the hose often does not solve the problem because the passageway that the hose attaches to is also plugged up. At this point, you then have a choice of removing the intake manifold and cleaning it out or clearing it externally without removal as I outlined. This can't be done effectively using an item such as a coat-hangar because often the passage is not straight and the wire won't go around turns. Compressed air will sometimes work but often the obstruction has hardened from engine temperatures "cooking it" into a solid mass. Carb cleaner helps dissolve the mass but without using a flex cable to "rout" it out, it would take a year to clear it.

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