2500 4x2 Pickup L6-359 5.9L DSL Turbo (1994)
Thermostat: Service and Repair
The content of this article reflects the changes called out by TSB 07-04-94.
THERMOSTAT REMOVAL - DIESEL ENGINE
WARNING: DO NOT LOOSEN THE RADIATOR DRAINCOCK WITH THE SYSTEM HOT AND PRESSURIZED. SERIOUS BURNS
FROM THE COOLANT CAN OCCUR.
Do not waste reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.
1. Disconnect both negative battery cables from both batteries.
2. Remove accessory drive belt.
3. Drain cooling system until coolant level is below thermostat.
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 a matching number or letter.
4. Remove radiator hose clamp and hose from thermostat housing. A special clamp tool must be used to remove the constant tension clamps.
