![]() Tires, when tread reaches 2/32 inch or not longer than six-yearsīattery, at any sign of leakage, load test failure or around three-years Timing belt, 60,000 to 100,000 miles or not longer than seven-years Oil change every 3,000 to 5,000 miles, depending on driving habits Proper transmission service, every 30,000 to 60,000 milesĬoolant replacement, every three to five years, depending on pH Waiting for an oil leak, knocking noise or an oil warning light often means a new engine.īelow is a short and partial list of true maintenance itemsįor more information, see our Maintenance Category. When the oil and filter are replaced damage causing contaminants are removed from the engine. Replacing the spark plugs on time can prevent these expensive repairs even though no symptom may be present. The check engine light is not indicating maintenance due, rather it signals a failure after it has occurred. ![]() Exceeding duty-cycle can result in ignition coils burning up or even a module failing. For example if the spark plugs are not replaced based on the maintenance schedule, the secondary ignition can be over-worked. Waiting for a symptom is very expensive.Ī check engine light being on, an engine running rough or using more fuel than before are signs the engine management system has failed. Replacing the coolant based on time and specific testing can prevent thousands of dollars in repair. This means a leak has developed, normally because corrosion has caused extensive damage to the cooling system. For instance when a coolant light comes on the coolant is low. Waiting for symptoms to occur is known as - Run Till Fail - It is the most expensive way to operate the vehicle.īy the time symptoms are noticed, damage has already been done. An annual general inspection by a trusted professional will provide over all lowest cost of vehicle ownership. Maintenance should be performed based on time, mileage, oportating conditions and inspection. The first symptom will often be a breakdown. Modern vehicles are designed to isolate the driver from symptoms. The fluid is then replaced with the proper fluid that is specified by the manufacturer. It also provide an opportunity to torque valve body bolts, adjust bands where present and detect problems that may not show symptons yet. Proper transmission service includes inspection of the unit, removing the pan on transmissions that have one, and replacing filters that are replaceable. This does not address the more comon problem of a restricted filter and can make it worse. With a flush, clean fluid is circulated through a dirty transmission and called a service. It takes an actual maintenance item, proper transmission service and turns it into a high-profit wallet flush. ![]() The transmission flush is a different twist. In the same class is induction cleaning which may only be an upsell used to increase profit. Routine injector cleaning will not increase fuel mileage, will not prevent problems and may cause damage. Quality gasoline contains detergent and fuel injectors are designed to be self-cleaning. ![]() It is a seldom needed repair to address a specific problem which is dirty injectors. These recommendations are for services that are not truly helpful rather only represented as such.įor instance, cleaning injectors is NOT maintenance. Charlatans use this misunderstanding to sell all sorts of high-profit snake oil. What may cause problems is a misunderstanding about what proper maintenance is. Proper maintenance is a service that prevents or lessens the chances of a more expensive repair. Repair addresses a problem that has occurred ![]()
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