Perkins 4GM - How to Drain the Coolant Circuit

Chapter 4 TPD1327E
Page 18
How to drain the coolant circuit
Warnings!
• Discard the used coolant in a safe place and in
accordance with local regulations.
• Do not drain the coolant while the engine is still
hot and the system is under pressure because
dangerous hot coolant can be discharged.
Note: Ensure that the drain holes are not restricted.
1. Remove the coolant ller cap (on page 17/A3).
Remove the drain plug (A1) from the cylinder
block.
2. For 4 cylinder engines: Remove the hose (B1)
from the heat exchanger.
3. Remove the drain plug from the coolant jacket of
the exhaust manifold (C1).
4. For 6 cylinder engines: Remove the drain plug
(on page 19/B1) from the heat exchanger for the
coolant system.
5. Remove the drain plug (on page 19/C1) from the
cooled manifold assembly. Ensure that the drain
holes are not restricted.
6. After the system has been drained, t the ller
cap and the drain plugs.
7. Fasten a label in a suitable place to indicate that
the coolant system has been drained.
Caution: The closed circuit system cannot be
drained completely. If the coolant is drained for
engine preservation purposes or for protection
from frost, the coolant system must be lled again
with an approved antifreeze mixture. See “Coolant
specication” in section 5 for details of the correct
coolant to be used in the circuit.