Mechanics

JEEP CHEROKEE RADIATOR PROBLEM

2003 Jeep Cherokee • 122,000 miles

How do I replace the radiator on a jeep grand Cherokee Laredo.2003 v8
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Guest
January 22, 2013.



Ok, now we have an engine size, I sent for 4.0 6 since you did not specify.

RADIATOR 4.7L

REMOVAL

WARNING: DO NOT REMOVE THE CYLINDER BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR DRAINCOCK WITH THE SYSTEM HOT AND UNDER PRESSURE. SERIOUS BURNS FROM COOLANT CAN OCCUR. REFER TO COOLING SYSTEM DRAINING.

Do not waste reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.

WARNING: CONSTANT TENSION HOSE CLAMPS ARE USED ON MOST COOLING SYSTEM HOSES. WHEN REMOVING OR INSTALLING, USE ONLY TOOLS DESIGNED FOR SERVICING THIS TYPE OF CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER 6094). SNAP-ON CLAMP TOOL (NUMBER HPC-20) MAY BE USED FOR LARGER CLAMPS. ALWAYS WEAR SAFETY GLASSES WHEN SERVICING CONSTANT TENSION CLAMPS.

CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.

CAUTION: When removing the radiator or A/C condenser for any reason, note the location of all radiator-to-body and radiator-to-A/C condenser rubber air seals. These are used at the top, bottom and sides of the radiator and A/C condenser. To prevent overheating, these seals must be installed to their original positions.

Disconnect the negative battery cable at battery.
Drain coolant from radiator. Refer to Cooling, Service and Repair See: Service and Repair
Remove the front grill. Refer to Body and Frame, Grille, Service and Repair See: Body and Frame\Grille\Service and Repair
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. Refer tp Steering, Power Steering, Power Steering Line/Hose Service and Repair See: Maintenance\Hoses\Power Steering Line/Hose\Service and Repair
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. REFER TO REFRIGERANT WARNINGS BEFORE HANDLING ANY AIR CONDITIONING COMPONENT.

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).

CLEANING
Clean radiator fins with the engine cold, apply cold water and compressed air to the back (engine side) of the radiator to flush the radiator and/or A/C condenser of debris.

INSPECTION
The radiator cooling fins should be checked for damage or deterioration. Inspect cooling fins to make sure they are not bent or crushed, these areas result in reduced heat exchange causing the cooling system to operate at higher temperatures. Inspect the plastic end tanks for cracks, damage or leaks.
Inspect the radiator neck for damage or distortion.

INSTALLATION

CAUTION: Before installing the radiator or A/C condenser, be sure the radiator-to-body and radiator-to A/C condenser rubber air seals are properly fastened to their original positions. These are used at the top, bottom and sides of the radiator and A/C condenser. To prevent overheating, these seals must be installed to their original positions.

Equipped with air conditioning: Gently lower the radiator and fan shroud into the vehicle. Guide the two radiator alignment dowels through the holes in the rubber air seals first and then through the A/C support brackets. Continue to guide the alignment dowels into the rubber grommets located in lower radiator crossmember. The holes in the L-shaped brackets (located on bottom of A/C condenser) must be positioned between bottom of rubber air seals and top of rubber grommets.
Connect the radiator upper and lower hoses and hose clamps to radiator.

CAUTION: The tangs on the hose clamps must be positioned straight down.

Install coolant reserve/overflow tank hose at radiator.
Connect both transmission cooler lines at the radiator.
Install both radiator mounting bolts.
Install air inlet duct at grill.
Attach electric connector for hydraulic fan control solenoid.
Install the grill. Refer to Body and Frame, Grille, Service and Repair See: Body and Frame\Grille\Service and Repair
Connect the two high pressure lines to the hydraulic fan drive. Tighten 1/2 inch pressure line fitting to 49 Nm (36 ft. Lbs.) And the 3/8 inch pressure line fitting to 29 Nm (21.5 ft. Lbs.).
Connect the low pressure hose to the hydraulic fan drive. Position the spring clamp.
Connect the power steering filter hoses to the filter. Install new hose clamps. Refer tp Steering, Power Steering, Power Steering Line/Hose Service and Repair See: Maintenance\Hoses\Power Steering Line/Hose\Service and Repair
Rotate the fan blades (by hand) and check for interference at fan shroud.
Refill cooling system. Refer to Cooling, Service and Repair See: Service and Repair
Refill the power steering reservoir and bleed air from system.
Connect battery cable at battery.
Start and warm engine. Check for leaks.

ASEMaster6371
Jan 22, 2013.