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Some important tips about K&N
Filterchargers |
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Service Interval |
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K&N Filtercharger is a high-performance air filter, both in terms of air
flow and filtration. However, the service interval can vary widely
depending on the severity of the driving conditions. The service
interval can be from 100 miles in a desert-racing environment to 50,000
miles for normal street use. The proper way to determine when an air
filter needs service is with an air restriction gauge. Such a device is
commonly used on heavy duty trucks and construction equipment. A
restriction gauge, measures the pressure differential inside and outside
the filter and gives the information in different forms of measurement.
As the filter collects more and more dirt, the restriction value
increases. At a predetermined point or rate of restriction, the filter
is serviced. The maximum allowable restriction for a K&N Filtercharger
is 15" of vacuum (water). If the restriction is allowed to go higher,
the filter media might become so restricted that the element could
distort allowing dirty air to bypass the filter and enter the engine.
Conversely, cleaning a filter too often will shorten its serviceable
life expectancy. Installing a restriction gauge will optimize service
intervals and take the guess work out of your maintenance schedule. |
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Service Life |
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K&N Filtercharger can be washed up to 25 times before it is considered
no longer serviceable. Even though the filter may not show outward signs
of deterioration, it should be replaced after 25 washings. Excessive
washings will deplete the tiny cotton hairs that crisscross the
openings. The resulting damage will allow tiny dust particles to pass
through. |
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Limited Warranty |
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All K&N stock replacement air filters are backed by our famous 10
year/million mile limited warranty. See our warranty page for stock
replacement and off-road warranty details. |
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Over-oiling |
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When servicing a K&N filter, take care not to over-oil the element.
Besides impeding air flow, excess oil can migrate into the intake system
where it can coat electronic sensors, which may hinder their operation.
Never saturate the filter. If oil drips from the filter, wash it and
start over. Use only K&N oil. For example, an E-1500 filter has
92.4-inches of surface area requiring 1.707 fluid ounces of oil. Follow
oiling instructions included with your filter. |
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Fit and Finish |
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When installing a K&N filter, check all gaskets, clamps and seams for
damage and/or deterioration. Check the filter's sealing surface. Do not
install a filter if the seal shows signs of damage or deterioration.
Check for cracks in the air box, particularly at the seams and around
the corners. Such defects could cause air leakage around the filter.
Also, check to insure the filter is sealing properly in the air box. A
plastic air box can warp from age or continuous heat cycling. Apply a
thin layer of filter grease on both sides of the seal each time the
filter is installed. An impression in the grease will indicate a
positive seal. Check any lines or hoses connected to the air box or
adjoining hoses leading to the engine. Engine oil in the air box,
resulting from excessive blow-by, will cause the filter to shrink and
possibly lose its seal. Clean any dust or debris out of the air box with
a damp cloth, making sure nothing enters the air inlet while the filter
is out. Never start the engine without the filter in place. Use only K&N
Air Filter Cleaner to clean your filter. Harsh household cleaners can
damage the cotton material and/or the rubber seal. Check the outside of
the medium for broken wires, rips or tears. Do not use an element that
shows signs of damage or wear. Use K&N Air Filter Sealing Grease on the
sealing surface that contacts the air box. Do not use sealing grease on
clamp-on type filters. If a filter is especially difficult to install,
it will come with an instruction sheet explaining the correct
installation procedure. Keep the instruction sheet with the vehicle for
reference anytime the filter is removed. It is very important the filter
be installed correctly. The filter can be positioned in the base or the
lid, whichever is more convenient and makes the installation easier. Do
not use excessive force to install a filter. |
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