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Hey, you're in the vehicle / car zone--YOUR HANDYMAN ZONE!

Cars / Trucks / Vans Category: Miscellaneous Informational Topics

Informational Topic:

Positive crankcase ventilation (PCV) valve, what should be given its due maintenance attention when maintaining the engine overall.

The Information You Need:

It is not uncommon for vehicle owners to overlook the maintenance care of their vehicle's PCV valve when otherwise maintaining the vehicle's engine overall.  Such an oversight can be very costly to vehicle owners as it can be consequently damaging to their respective vehicles.  Therefore, the PCV valve should be replaced at least every 50,000 miles / 2-3 years of regular vehicle use (in any event, be sure to check with your vehicle manufacturer, such as consulting its issued owner's manual, to confirm the PCV valve-change period to maintain your specific warranty, if any).

The routine replacement of the PCV valve, as stated above, is pivotal in maintaining its two main functions:  1) acting as an emissions control device (primarily for the environment); and 2) acting as a self-purifier (of course, for the vehicle).

As an emissions control device, the PCV valve inhibits hydrocarbon vapors from being released into the atmosphere while the vehicle is in operation, causing such vapors to be channeled into the air intake manifold so as to become a part of the air-and-fuel mixture that is ultimately burned as part of the vehicle's combustion sequence.

As a self-purifier for the vehicle, the PCV valve acts to prohibit moisture from permeating and accumulating inside the engine, and further prevents the cultivation of detrimental pasty slime therein.

Failing to routinely test and replace the PCV valve can cause several problems for your vehicle, including the following: An engine that runs rough, and hesitates and surges at times; oil that leaks into the air filter; oil that leaks into the air intake manifold, causing unnecessary emissions in addition to loss of efficient oil use; and the formation of pasty slime as result of the mixture of oil and moisture that otherwise would be prevented by a correctly operating PCV valve.

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