2008 Jeep Grand Cherokee Owners Manual

320
STARTING AND OPERATING
check  tire  pressu  re.  Do  not  make   a  visu al judgem  ent
when  determ ining  prop er inflation.  Radial  tires may  look
prop erly  inflated  even  when  they  are und er  inflated .
Check tire  pressu res more  often if subject  to a wide  range
of  outdoor    tem peratu res,  as  tire   pressu res  vary   with
tem peratu re changes.
Tire pressu res  change  by approxim ately  1 psi  (7 kPa) per
CAUTIO N!
12°
F (7° C) of air tem peratu re change.  Keep  this in  mind
when  checking  tire pressu re insid e a garage,  especially  in
the  winter.
After   inspectin  g or   adjustin  g the   tire  pressu  re,  al-
ways  rein stall  the  valve  stem cap  (if equipped).    This
will   preven t  moistu  re  and   dirt   from   enterin g   the
valve  stem , which  could   damage  the  valve  stem .
Example:  If garage   tem peratu re =  68° F (20° C)  and  the
outsid e  tem peratu re  =  32° F  (0°  C)  then  the  cold   tire
inflation  pressu re  shou ld be  increased  by  3 psi (21  kPa),
which  equ als 1 psi  (7 kPa) for  every  12° F (7° C) for  this
outsid e tem peratu re  cond ition.
Inflation   pressu res  specified  on  the  placard   are  alw ays
“cold  tire inflation  pressu re.”  Cold  tire inflation  pressu re
is defined   as  the  tire  pressu re  after  the  vehicle  has  not
been driven  for  at least 3 hou rs, or driven  less  than 1 mile
Tire pressu re  may increase  from  2 to  6 psi (13 to  40 kPa)
during  operation.   DO  NOT  red uce this norm al  pressu re
build  up  or you r tire  pressu re  will be  too low.
(1
km)  after   a  3  hou r  period .  The  cold   tire  inflation
pressu re  must  not  exceed  the  maxim um  inflation   pres-
sure  molded  into  the  tire sidewall.
Product Specification
CategoriesJeep Grand Cherokee Manuals, Jeep Manuals
Model Year2008
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- 490 pages
Document File TypePDF
CopyrightAttribution Non-commercial
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