Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Coolant Line/Hose: Description and Operation
Rubber hoses route coolant to and from the radiator, intake manifold and heater core.
Radiator lower hoses are spring-reinforced to prevent collapse from water pump suction at moderate and high engine speeds.
Hose Clamp Tool-Typical
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.
Clamp Number/Letter Location
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.
Inspect the hoses at regular intervals. Replace hoses that are cracked, feel brittle when squeezed, or swell excessively when the system is pressurized.
For all vehicles: In areas where specific routing clamps are not provided, be sure that hoses are positioned with sufficient clearance. Check clearance
from exhaust manifolds and pipe, fan blades, drive belts and sway bars. Improperly positioned hoses can be damaged, resulting in coolant loss and
engine overheating.
Ordinary worm gear type hose clamps (when equipped) can be removed with a straight screwdriver or a hex socket. To prevent damage to hoses or
clamps, the hose clamps should be tightened to 4 Nm (34 in. lbs.) torque. Do not over tighten hose clamps.
When performing a hose inspection, inspect the radiator lower hose for proper position and condition of the internal spring.
