Valve Stem Seal Removal; Valve Handling Precautions - Mitsubishi 4G9 User Manual

E
Mitsubishi Motors Corporation
4G9 ENGINE (E - W) -
AC" VALVE STEM SEAL REMOVAL
AD" VALVE HANDLING PRECAUTIONS
(1) Sodium reacts violently with water or moisture generation
(2) Handling of Sodium-filled Exhaust Valves
(3) How to Neutralize Sodium
Nov. 1995
Cylinder Head and Valves
heat and liberating hydrogen. It must be handled with
utmost care because otherwise the following dangerous
conditions may result:
Loss of eyesight if sodium gets in eyes.
Burns if sodium contact skin.
Fire hazard.
Sodium-filled exhaust valves are not dangerous and may
be handled in the same way as ordinary valves unless
they are broken.
Never try to break the valves and expose sodium to the
air. When worn exhaust valves are to be discarded,
have them disposed of by a salvage company equipped
with special disposal system, notifying them that the valves
contain sodium.
Should the exhaust valves be broken, neutralize sodium
using the method described below, and discard the valves
in the same way as ordinary valves.
Place a container filled with more than 10 liters of water
in a well ventilated large space.
Wear rubber gloves and goggles, and carefully take out
broken valves from the cylinder head.
Put a broken valve in the water-filled container and quickly
get away from the container at least 2 or 3 m (6.6 or
10 ft.)
PWEE9502-A
11A-9-5
Revised