Cooling System 49
Extended Life Coolant Change Interval
Replace coolant every 300,000 miles
(480,000 km), 6,000 hours or every four
years, whichever comes first.
A one-time extender package must be
added to the cooling system after 150,000
miles (240,000 km), 3,000 hours or two
years, whichever comes first.
NOTE! Do not add supplement coolant
additives (SCA) to extended life coolant.
CAUTION
Extended life coolant will test as out of
additives (SCA), but SCA should not be
added. Shortened engine life may be the
result of adding SCA.
Should the system become contaminated
with regular coolant exceeding 10 % of the
system’s total capacity or if SCA is added
to the system, either drain the system and
refill with new extended life coolant or
maintain the system as for regular coolant.
Continue treating with SCA and change the
coolant at the intervals recommended for
regular coolant.
Coolant Filter
Do not use a filter that contains SCA. In-
stead use a bypass canister or “empty”
filter. Replace the “empty” filter every
125 000 miles (200 000 km) or 2500 h or
12 months, whichever comes first, to pre-
vent external rust damage to the filter
walls.
WARNING
Hot engine. Keep yourself clear of all
hot engine parts and/or fluids. A hot en-
gine and/or fluids can cause serious
burns.
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