Chevrolet 25043146 CLEANER A

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It is advisable to replace both the air filter and PCV filter at specified intervals as part of a comprehensive preventative maintenance program. The air filter is located on top of the engine within the air cleaner housing, which can be accessed by unscrewing the wing nut and lifting off the top plate. It is important to be careful when removing the top plate to avoid anything from falling into the carburetor. Lift out the air filter from its housing, then hold it up against strong light where you can check whether light passes through it. If you see light all round through the paper element then it is okay. Use a cloth to wipe clean the interior of the air cleaner before securely seating either an old filter (if still in good condition) or new one if recommended replacement period has elapsed. Reconnect any vacuum hose that may have been disconnected after which secure it by screwing back in place its wing nut. Also, within most air cleaner housings you will find PCV filters that can be accessed using almost identical methods as those followed when accessing an air filter; thus they involve loosening a hose clamp, disconnecting a hose, removing a metal locking clip securing a filter holder, replacing a filter and plastic holder for another one. It is essential to compare new with old filters for matching purposes. Fasten up PCV hose before reattaching clamp thereafter installing back again top plate of air cleaner and previous disconnected vacuum hoses thereby noting that there are engines having PCV filters located within their PVC hoses while replacing "in-line" PVC filters usually entails disconnecting a hose from such filter and replacing such with new one.