If you have just
purchased a 1970 Mustang, you have just purchased
an automobile that is over 35 years old. Now
think about that for minute. Except for whatever
items that have been replaced over time because
of maintenance, damage, or age, many components
on your mustang may still be the original items.
Many of these items are where you are placing
your personal safety when you are driving your
mustang. More than once, I have had a component
fail causing me a tremendous amount of surprise
and expense, not to mention the later realization
that death or injury could have been a likely
result. Unfortunately, all too often the seller
either doesn't reveal all he knows about the
condition of the vehicle or may be in the dark
himself as to the actual condition of the car or
it's components. Over the years, I have
encountered some mechanical components that have
revealed themselves to be not only aged but
downright dangerously faulty and left to me to
find out about later. Some of these are often not
thought about by some new buyers.
With this in mind, I suggest that the following
components should definitely be inspected and
possibly replaced if there is any question about
their condition.1. REAR AXLE BEARINGS.
This is the worst area by far that I have seen
neglected. I am not sure if it's because people
just don't think about them or they think they
last forever. In the 80's, I had a friend with a
69 coupe who had his right rear axle bearing
freeze going down the road and the axle literally
spun itself right out of the rearend housing and
this was while he was driving down the highway!!
2. REAR
END GREASE. If the rear end gears have a
lot of miles on them and the grease is never
changed, the grease will turn extremely black and
have the consistency of molasses. It will smell
burned. If the car then just sits for a long
time, condensation will cause water to form on
top of the grease and contaminate it. When in
doubt, drain it all out and put in fresh grease.
3. IDLER
AND PITMAN ARMS. Again with age, these
components can dry out, especially if they are
the original non greaseable kind, and seize up on
you. it is much better to have a worn out working
idler or pitman arm than a dried out seized unit.
4. DRIVESHAFT
U-JOINTS. In 1979, I bought a Boss 302
from the original owner. Two weeks after I bought
it, I was driving on an interstate at around 70
MPH or so and I began to hear a slight rumbling
noise in the very center rearward underneath.
Suddenly the rear u-joint let loose and the
driveshaft came loose from the rear end housing
yoke. I was lucky that it was the rear and not
the front joint to let loose or the car could
have jackknifed upward and over. Upon inspection,
both of the u-joints were dry and out of grease.
I replaced both with greaseable ones. Losing a
driveshaft at speed down the highway is not
something I would want to happen to anyone.
5. STEERING
GEAR BOX FLEXIBLE COUPLER. This is the
coupler that connects the steering column to the
steering box under the hood. These couplers get
old and wear out. Fortunately they are made
differently than todays cars and can get worn but
won't outright fail usually. They still should be
inspected for extreme age and wear for a nice
tight steering feel.
6. CRANKSHAFT
DAMPENER. This is a weighted balanced
thick metal disk that attaches to the front of
the crankshaft outside of the engine and has the
timing marks you use for timing your engine. This
is a two piece unit with a rubber insert and with
age can wear allowing the outer ring to shift and
sometimes even separate. Naturally if the outer
rings shifts, your timing won't be accurate but
you certainly do not want the outer ring to
separate while the engine is running. It can
damage just about anything under the hood, such
as the radiator, fan, and so forth, and can be a
real surprise on the pocket book from the damage.
Inspect the dampener carefully and make sure the
rubber is still in good condition.
7. ANTIFREEZE.
Without going into the technical reasons
why, suffice it to say that antifreeze generally
goes bad after two years. This is just the way it
is. Now think about how often you change your
antifreeze and think about a 35 year old car.
Probably the antifreeze has been changed at some
time but even nice green antifreeze can be
breaking down and beginning to cause internal
corrosion to your radiator, thermostat, water
pump, heater core, and engine. Just change it and
go on with other things. You DON'T want to change
the heater core if you don't have to. Some shops
will even flush your system with anti-corrosion
solution and clean out the system before putting
fresh antifreeze in. 50/50 mix antifreeze and
water is the recommended mixture. If changing the
antifreeze causes a component such as the water
pump to fail, then it was dying anyway and you
needed to be aware of it. Some people have used
products like "Stop-Leak" to compensate
for a faulty radiator. This is a band-aid fix
that will catch up to you and this puts added
junk in your system.
Simple inspection
and maintenance of your Mustangs mechanical
components before you drive with confidence will
save you much in the long term and give you great
peace of mind in driving your Mustang safely and
enjoyably for years to come. I hope these
suggestions help you.
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