Jeep Cherokee 1977, Owner'S Manual

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6
Starting and Driving
Break-in Period
Jeep vehicles do not require a rigid break-in procedure
However, extra care for the first 500 miles will pay dividends.
During the flfst 100 miles, drive at varying speeds up to 50
mph. Then dnve at increasingly higher speeds-not exceed­
ing 55 mph-until your mileage reaches 500 (Observe all
local, state, and national speed llmits.)Ouring the entire
500
miles avoid driving at full throttle or at top speeds, and avoid
steady speeds or excessive idling. Avoid shifting into gear
after starting a cold engine without a warm-up of at least
15
seconds. Fast starts and quick stops should be avoided.
For the flfst 1,200 miles, do not expect top economy from
your vehicle. Engines tend to use more fuel and 011 until they
are broken in. Driveability and performance generally im­
prove as the engine breaks in. Check engine oil regularly and
be alert for any indication of overheating in any component of
the vehicle. Allow for proper break-m-at least 1,200
miles-before requesting engine adJustments ... 1f then
needed
Carbon Monoxide Warning
Avoid inhaling exhaust gases as they contain carbon monox-
ide which is colorless and odorless. Carbon monoxide is a
dangerous gas which can be lethal.
Guard against carbon monoxide by proper maintenance. If
exhaust sound changes, if fumes are detected in the vehicle.
or if the underside of the vehicle is damaged ... immediately
have a competent mechanic inspect the exhaust system and
adJacent panels for damage, m1slocated parts, or open or
loose Joints which could allow entry of fumes into the vehicle
interior. Until repairs are made, the vehicle should be driven
with
all
side windows
fully
open. The exhaust system should
be inspected every time the vehicle 1s raised for servicing.
To allow proper operation of the vehicle's ventilation system.
always keep front ventilation inlet grille clear of snow, leaves,
and all other obstructions.
Sitting, in a parked vehicle with the engine running for an
extended period is not recommended.
Do not run engine 1n a confined area such as a garage since
exhaust fumes contain deadly carbon monoxide. When ve­
hicle 1s stopped 1n an
unconfined
area with the engine run­
ning for any more than a short period, adjust heating and
ventilation system to force fresh outside air into the vehicle as
follows:
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