Post
Jan
. '98 '
F"
Series
thermostat
housing
Pre
Jan.
'98
Reservoir
I
Post
Jan.
'98
PHYSICAL
ID
Wa
t
er
Pump
• Water pump seals are dynamic seals.
During
engine
cran~ing
,
seepage past
the
seal occurs.
• A reservoir has been added
to
the housing
to
allow
the
small amounts of seepage past
the seal
to
accumulate
and
evaporate.
• This eli
mi
n
ates
the staining seen on prior
water
pumps.
The
r
mostat
Housing
•
To
provide
clearance for charge air cooler
piping
and
i
mprove
serviceability during
normal service operati
ons
,
the
•p• Series
thermostat housing is shorter, has a
th
icker
Hange and a
new
seal.
Wa
t
er
Pump
Pulley
• The water pump pulley diameter has been
decreased.
• If service is required, be
su
re to use
the
proper pulley to obtain proper pump speed
a
nd
avo
id
cooli
ng
system concerns.
11
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