Cooling System Draining
STANDARD PROCEDURE - COOLING SYSTEM DRAININGWhen servicing the cooling system, it is essential that coolant does not drip on the drive belts or pulleys. If necessary, shield the belts with shop towels before working on the cooling system. If coolant contacts the belts or pulleys, flush both with clean water.
WARNING: DO NOT REMOVE HOSE CLAMPS OR HOSES, CYLINDER BLOCK DRAIN PLUGS, COOLANT BOTTLE CAP, OR OPEN THE RADIATOR DRAINCOCK, WHEN THE SYSTEM IS HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM THE COOLANT CAN OCCUR.
The radiator draincock that is located at the lower right side of radiator. The draincock stem is closed in the horizontal position, pointing to 3:00 o'clock. Draining takes place through the cooling module's lower right side insulator. Do Not Use pliers to open draincock.
CAUTION: Do not pull outward on the draincock flange while opening. Damage to the draincock body and O-ring seal may occur
1. To open the draincock to the minimum drain position, turn the draincock stem counterclockwise to the 12:00 o'clock position. For the maximum drain position, turn draincock stem counterclockwise 180 ° to the 9:00 o'clock position.
2. Remove coolant pressure bottle cap and open the bleed valve.
3. Remove the cylinder block drain plug(s) located below each exhaust manifold.
Most service drains are about 80 % of capacity because not all coolant is drained from system.
CAUTION: The cooling system normally operates at 97 - 124 kPa (14 - 18 psi) pressure. Exceeding this pressure may damage the radiator or hoses.