Downloaded from www.Manualslib.com manuals search engine 8. Then  replace the pressure cap. At any  time  during 
this  procedure 
if coolant  begins  to  flow out of the 
filler  neck,  reinstall  the pressure  cap. Be sure  the 
arrows 
on the pressure  cap  line up like this. 
Engine Fan Noise 
Your  vehicle  has  a clutched engine cooling fan.  When  the 
clutch  is engaged, 
the fan spins faster to  provide more air 
to cool  the engine.  In most  every  day driving conditions, 
the  fan 
is spinning slower  and  clutch is  not fully engaged. 
This improves  fuel economy and reduces  fan  noise. 
Under  heavy  vehicle  loading, trailer towing and/or  high 
outside temperatures,  the  fan speed increases 
as the  clutch 
more 
fully engages. So you  may  hear  an  increase in fan 
noise.  This 
is normal  and  should not  be  mistaken  as  the 
transmission  slipping 
or making extra  shifts. It is merely 
the  cooling system functioning  properly. The fan  will 
slow  down  when  additional cooling  is  not  required  and 
the  clutch  partially  disengages. 
You may also hear this  Fan noise  when  you  start 
the engine. It will go away as the  fan clutch 
partially disengages. 
5-19   
Downloaded from www.Manualslib.com manuals search engine Tampering  With  Noise  Control 
System  Prohibited 
Federal law prohibits the following acts or the 
causing  thereof 
1. 
2. 
The  removal  or rendering  inoperative by any person, 
other than 
for purposes of maintenance, repair  or 
replacement, 
of any  device  or  element of design 
incorporated 
into any  new  vehicle  for the purpose of 
noise control, prior to its  sale  or  delivery to the 
ultimate purchaser  or while 
it is in use;  or 
The  use 
of the vehicle  after such device  or element 
of  design has been removed  or rendered  inoperative 
by  any person. 
Among those  acts presumed 
to constitute  tampering  are 
the  acts  listed  below. 
Insulation: 
0 Removal of noise shields  or underhood insulation. 
Engine: 
Removal  or rendering  engine speed governor  (if so 
equipped) inoperative so as to allow engine  speed to 
exceed  manufxturer  specifications. 
Fan  and  Drive: 
Removal of fan clutch (if so equipped)  or rendering 
clutch inoperative. 
Removal of fm shroud (if so equipped). 
Air  Intake: 
0 Removal of air  cleaner silencer. 
0 Reversing air cleaner cover. 
Exhaust: 
0 Removal  of muffler and/or resonator. 
Removal  of exhaust pipes  and exhaust pipe  clamps. 
6-10