Engine Cooling problem
1999 Jeep Cherokee 6 cyl Two Wheel Drive Automatic

When replaceing the radiator how do you hook up the bottom transmission coolant line? I can not get the metal piece out of the old line.
Do you
have the same problem?
Friday, March 6th, 2009 AT 6:13 PM

1 Reply

  • 16,541 POSTS
Requires a special service tool for the tranny cooling lines.

Disconnect battery negative cable.
Remove radiator pressure cap.
For access to radiator draincock, remove radiator grill mounting screws and remove grill.
Attach one end of a 24 inch long x 1/4 inch ID hose to the radiator petcock Put the other end into a clean container. Open petcock and drain radiator.
Detach power steering fluid reservoir from fan shroud and lay aside.
Disconnect electric cooling fan electrical connector, if equipped
Disconnect CRS hose from radiator filler neck and remove from shroud retaining loops.
Remove the four (4) viscous fan/drive assembly nuts from the water pump pulley and remove fan/drive assy.
Remove the four (4) fan shroud to core support mounting screws.
Remove the electric fan (if equipped) and shroud assembly from the vehicle
Remove radiator upper crossmember.
If equipped with air conditioning, separate radiator from condenser by removing condenser-to-radiator mounting brackets.
Disconnect upper and lower radiator hoses.
If equipped, disconnect and plug automatic transmission fluid cooler lines. Quick Connect Fitting Release Tool 6935 may be needed. If equipped with remote transmission cooler, remove line to cooler from bracket at bottom of radiator
Lift radiator straight up and out of engine compartment taking care not to damage fins.
If radiator is to be replaced, be sure to remove and transfer any components not included with replacement radiator.

The radiator is supplied with two alignment dowels. They are located on the bottom tank and fit into rubber grommets in the radiator lower crossmember.
Lower radiator into engine compartment. Position alignment dowels into rubber grommets in radiator lower crossmember.
If equipped with air conditioning, attach condenser to radiator with mounting brackets
Install radiator upper crossmember and four mounting bolts.
Install radiator upper crossmember-to-isolator nuts. Tighten nuts to 86 inch lbs. (10 Nm) torque. If isolator-to-radiator nuts had been removed, tighten them to 47 inch lbs. (5 Nm).
Connect radiator upper and lower hoses.
If equipped, connect automatic transmission fluid cooler lines. If equipped with remote cooler, attach cooler line to bracket at bottom of radiator.
Install electric fan (if equipped) and shroud assembly. Insert alignment tabs at bottom of fan shroud into slots in bracket at bottom of radiator. Tighten mounting bolts to 31 inch lbs. (3 Nm).
Connect electric cooling fan electrical connector.
Install power steering reservoir to fan shroud.
Install grill.
Connect battery negative cable.
Fill cooling system with correct coolant.
Install pressure cap.
Check and adjust automatic transmission fluid level (if equipped)
Start engine and visually check for leaks.
Disconnect the negative battery cable at battery.
Drain coolant from radiator.
Remove the front grill.
Remove two radiator mounting bolts.
Disconnect both transmission cooler lines from radiator.
Disconnect electrical connector for the fan control solenoid.
Disconnect the power steering cooler line from cooler and filter.
Disconnect the radiator upper and lower hoses.
Disconnect the overflow hose from radiator.
Remove the air inlet duct at the grill.
The lower part of radiator is equipped with two alignment dowel pins. They are located on the bottom of radiator tank and fit into rubber grommets. These rubber grommets are pressed into the radiator lower crossmember. WARNING
The air conditioning system (if equipped) is under a constant pressure even with the engine off. NOTE
The radiator and radiator cooling fan can be removed as an assembly. It is not necessary to remove the cooling fan before removing or installing the radiator.
Disconnect the two high pressure fluid lines at the hydraulic fan drive.
Disconnect the low pressure return hose at the hydraulic fan drive.
Gently lift up and remove radiator from vehicle. Be careful not to scrape the radiator fins against any other component. Also be careful not to disturb the air conditioning condenser (if equipped).

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Friday, March 6th, 2009 AT 7:36 PM

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