It’s best to replace spark plugs as part of preventative maintenance based on manufacturer’s specifications. This can help save you from costly repairs, as driving with misfiring spark plugs could put undue stress on your car’s catalytic converter (the engine’s exhaust cleaner).
Symptoms of misfiring spark plugs include rough idling, uneven power when accelerating, and an increase in exhaust emissions.
As a car owner, preventive maintenance is the single most important thing you can do. Regular maintenance is akin to getting regular doctor checkups. They keep your car healthy and give car experts a chance to catch small problems before they become big ones. Auto care preventative maintenance includes regular services, inspections and repairs that prevent potential problems, such as lubrication, adjustments, cleaning, testing, and replacement of worn parts.
Serpentine belts, V-belts and timing belts all have a limited service life. New belts should always be recommended when a customer is buying a water pump, alternator, A/C compressor or power steering pump. A new timing belt should also be installed when replacing a cylinder head or camshaft on an overhead cam (OHC) engine with a belt cam drive.
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