Chrysler Front Wheel Drive Cars 6-CYL 1988-1995 Repair Information

Hoses

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See Figures 1, 2, 3 and 4



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Fig. Fig. 1: The cracks developing along this hose are a result of age-related hardening



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Fig. Fig. 2: A hose clamp that is too tight can cause older hoses to separate and tear on either side of the clamp



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Fig. Fig. 3: A soft spongy hose (identifiable by the swollen section) will eventually burst and should be replaced



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Fig. Fig. 4: Hoses are likely to deteriorate from the inside if the cooling system is not periodically flushed

REMOVAL & INSTALLATION




CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

Except Premier and Monaco
3.0L ENGINES

See Figure 5

The 3.0L engines use metal piping beyond the lower radiator hose to route coolant to the suction side of the water pump, located in the V of the cylinder banks.

These pipes are also provided with inlet nipples for thermostat bypass and heater return coolant hoses, and brackets for rigid engine attachment. The pipes employ O-rings for sealing at their interconnection and to the water pump.


CAUTION
Do not perform this procedure on a hot or warm engine. Otherwise, serious injury could result.

  1. Drain the cooling system through the bottom of the radiator (the block need not be drained to replace the hoses.
  2.  
  3. Remove the top hose from the radiator neck and the crossover and water box housing.
  4.  
  5. Remove the bottom hose from the right end of the hard inlet pipe and the bottom of the radiator.
  6.  
  7. Remove the heater hoses from the core connections near the firewall and the nipples on the cylinder head and right end of the hard inlet pipe. Remove any bypass hoses from the thermostat housing and intake manifold.
  8.  



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Fig. Fig. 5: Cooling system schematic for 3.0L engines-except Premier and Monaco vehicles

  1. Once all of the rubber hoses are removed, the two hard pipes CANNOT be unbolted from the engine block. The hard pipes cannot be removed until the water pump and intake manifold/plenum are removed.
  2.  
  3. Check the hoses for damage. Hoses that are brittle, cracked, or extremely soft and pliable require replacement. Replace them as necessary.
  4.  
  5. Inspect the clamps for corrosion, fatigue (causing them to lose their springiness), or, in the case of aircraft type clamps, stripped threads. Replace any clamps that are questionable.
  6.  
  7. Install the rubber hoses to their respective positions and tighten the retaining clamps. Make certain that the clamps are installed to the inside of the nipple bulge. Also, the clamps should be installed so that they are 0.25 in. (6mm) from the edge of the hose. Refill the cooling system.
  8.  

3.3L AND 3.8L ENGINES

See Figure 6


CAUTION
Do not perform this procedure on a hot or warm engine. Otherwise, serious injury could result.

  1. Drain the cooling system through the bottom of the radiator (the block need not be drained to replace the hoses.
  2.  
  3. Remove the top hose from the radiator neck and the thermostat housing.
  4.  
  5. Remove the bottom hose from the water pump and the bottom of the radiator.
  6.  
  7. Remove the heater hoses from the core connections near the firewall and the nipples on the cylinder head and thermostat housing. Remove any bypass hoses from the thermostat housing and intake manifold.
  8.  



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Fig. Fig. 6: Cooling system routing diagram for 3.3L and 3.8L engines

  1. Check the hoses for damage. Hoses that are brittle, cracked, or extremely soft and pliable require replacement. Replace them as necessary.
  2.  
  3. Inspect the clamps for corrosion, fatigue (causing them to lose their springiness), or, in the case of aircraft type clamps, stripped threads. Replace any clamps that are questionable.
  4.  
  5. Install the rubber hoses to their respective positions and tighten the retaining clamps. Make certain that the clamps are installed to the inside of the nipple bulge. Also, the clamps should be installed so that they are 0.25 in. (6mm) from the edge of the hose. Refill the cooling system.
  6.  

Premier and Monaco

See Figure 7


CAUTION
Do not perform this procedure on a hot or warm engine. Otherwise, serious injury could result.

  1. Drain the cooling system through the bottom of the radiator (the block need not be drained to replace the hoses.
  2.  
  3. Remove the top hose from the radiator neck and the thermostat housing.
  4.  
  5. Remove the bottom hose from the water pump and the bottom of the radiator.
  6.  
  7. Remove the heater hoses from the core connections near the firewall and the nipples on the cylinder head and thermostat housing. Remove any bypass hoses from the thermostat housing and intake manifold.
  8.  



Click image to see an enlarged view

Fig. Fig. 7: Cooling system routing schematic for Premier and Monaco 3.0L engines

  1. Check the hoses for damage. Hoses that are brittle, cracked, or extremely soft and pliable require replacement. Replace them as necessary.
  2.  
  3. Inspect the clamps for corrosion, fatigue (causing them to lose their springiness), or, in the case of aircraft type clamps, stripped threads. Replace any clamps that are questionable.
  4.  
  5. Install the rubber hoses to their respective positions and tighten the retaining clamps. Make certain that the clamps are installed to the inside of the nipple bulge. Also, the clamps should be installed so that they are 0.25 in. (6mm) from the edge of the hose. Refill the cooling system.
  6.  

 
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