Knowing some basics about your
vehicle and scheduling regular maintenance work can
really help you save money on repairs. We've put
together some commonly asked car care questions and
answers for your convenience. Just click on the
question link for a quick answer.
Car Care Q&A
Here are some commonly asked car care and repair
questions. Click on the link for a quick answer.
What's the
correct tire pressure for my vehicle?
How should I
change my wiper blades?
How often should
I have my engine oil changed?
How can I tell if
my coolant is OK?
Why is heat
coming from my A/C?
What can I do if
my car overheats?
How often should
my car get a tune-up?
Why are my brakes
making noise?
Does my
transmission ever need service?
What’s the
correct tire pressure for my vehicle?
The correct tire pressure for a vehicle is
determined by the size and weight of the vehicle,
the type of tires it uses, load hauled, and the type
of driving the vehicle is intended for. The vehicle
manufacturer places a tire inflation placard in each
vehicle that gives the proper tire inflation
pressures for that vehicle. This placard is located
on the inside of the glove box door, inside the
fuel-filler door, or on the driver’s side doorpost
(depending upon manufacturer). Most manufacturers
also list tire inflation levels in the owner’s
manual.
How often
should I change my wiper blades?
For vehicles that are parked inside, car care
experts recommend that the wiper blades be replaced
at least once a year or when the wiper blades start
streaking – which ever comes first. On vehicles kept
outside or in areas where the wipers receive
excessive use, changing the blades two or even three
times a year is recommended for clear vision.
How often
should I have my engine oil/filter changed?
According to automotive experts,
regularly scheduled oil/filter changes are the
single most important item for prolonging engine
life. Most new vehicles have recommended oil/filter
change intervals of 7,500 miles and some new
vehicles have recommended oil change intervals of
11,000 to 15,000 miles under normal operating
conditions, with ""normal"" operation described as
the operation of the vehicle for at least 20 minutes
at a medium speed, with a steady throttle and in a
clean driving environment.
How can I tell
if my coolant is OK?
It is impossible to determine the
condition of the coolant in the radiator just by
looking at it. Coolant, a mixture of ethylene glycol
and water, breaks down with age, picks up
contaminants that cause sludge, and becomes acidic.
When this happens, it can cause corrosion within the
radiator and cooling passages of the engine. To
determine its condition, coolant must be checked
with coolant test strips that measure PH balance.
Coolant is an environmentally hazardous substance.
It pollutes the water table and is poisonous to
people and animals and therefore must be disposed of
as a hazardous waste. Your mechanic has special
tools and procedures for testing and changing
coolant.
Why is heat
coming out of my air conditioner?
If your air conditioning system is blowing hot air
instead of cool, the refrigerant gas may have leaked
out, you may have a clogged condenser, or the air
conditioner's blend door may be stuck. Whatever the
cause of the problem, the air conditioning system
needs immediate service. Turn the system off. You
can cool the vehicle interior by putting the
ventilation control in the ""vent"" position and/or
opening the windows.
What can I do
if my car overheats?
If you are driving at normal highway speed and the
vehicle starts to overheat, turn off the air
conditioner, turn on the heater and immediately pull
over to the shoulder. Odds are if the vehicle starts
to overheat at highway speed, there is a problem in
the cooling system such as low coolant, a clogged
radiator or a broken drive belt or burst hose. Once
at the shoulder, shut off the engine, open the hood
and let the engine cool down – 20 minutes minimum.
Once any over boiling stops and the engine has
cooled, look for obvious signs of trouble. DO NOT
attempt to open the radiator cap unless the engine
is off and the top of the radiator is cold. If there
is no noticeable problem such as a broken drive belt
or burst hose, you can then add a coolant/water
mixture to the radiator or overflow reservoir, start
the vehicle and drive slowly to a service facility.
How often
should my car get a tune-up?
The term “tune-up” actually applies only to older
cars without electronic ignition (before 1981). On
these vehicles a tune-up would generally be required
every 15,000 – 20,000 miles and consisted of
replacing the spark plugs, ignition contact points,
rotor and distributor cap and adjusting the ignition
timing as well as the carburetor.
On modern vehicles equipped with electronic
ignition, fuel injection and computer controls, the
term “engine performance maintenance” is a more
accurate term. A “tune-up” for these newer vehicles
is an orderly process of inspection, computer
diagnosis, testing and adjustment to maintain peak
engine performance, maximum operating efficiency and
low exhaust emissions. During this process, spark
plugs, plug wires, sensors, and modules may be
replaced. The frequency at which a newer vehicle
needs a tune-up is dependent more upon driving
conditions than mileage and recommended tune-up
frequencies vary between 30,000 – 100,000 miles,
depending on the manufacturer. To learn how often
your vehicle needs a tune-up, check your owner’s
manual or speak with your local automotive service
provider.
Why are my
brakes making noise?
If you hear a grinding or squealing sound when the
pedal is applied, you probably need new brake shoes
or pads. Brakes shouldn’t make any noise as they
operate. Even if the actual problem turns out to be
something minor, the only safe assumption is this
one: noisy brakes are unsafe brakes. Postponing
service is unsafe and could raise the cost of
repairs later. If your brakes are making noise, get
them inspected or serviced right away.
Does my
transmission ever need service?
Most car care experts advise having an automatic
transmission’s fluid and filter changed every two
years or 24,000 miles, to keep it in good working
order. This is especially important if the vehicle
is more than five years old. Many vehicles newer
than five years old may need scheduled service less
often and some new vehicles have transmissions that
need no scheduled service for the life of the car.
By-the-book service, however, may not be adequate if
your vehicle is driven hard, tows a trailer, goes
off-road or carries a camper. Under these
conditions, the fluid and filter may need to be
changed more often -- every 12 months or 12,000
miles --because dirt and moisture buildup in the
fluid can cause internal damage. Heat buildup can
also be a problem. The harder the transmission
works, the hotter the fluid gets and the quicker the
fluid breaks down. To find out the recommended
service schedule for your vehicle’s transmission,
check the owner’s manual or talk with your local
automotive service provider.
Manual transmissions generally need no regularly
scheduled service, but may need service due to worn
clutch and throw-out bearings and broken synchromesh
gears. Check your owner’s manual for specific
information on manual transmission service or talk
with your local automotive service provider. |