Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 23

11C-14
Drive pattern for air bleeding
Gradually open the
throttle valve.
Approx.
3,000 r/min
Idle speed
15 15
seconds
seconds
Once
ENGINE <4G6-MPI> -
High-
pressure
chamber
2. Run the engine at idle for 1 - 3 minutes to let it warm
Close the throttle
3. With no load on the engine, repeat the drive pattern shown
valve.
4. After the noise has disappeared, repeat the drive pattern
5. Run the engine at idle for 1 - 3 minutes and check that
On-vehicle Service
(4) If the air which has been mixed in with the oil due
to any of the above reasons gets into the high pressure
chamber of the lash adjuster, the air inside the high
pressure chamber will be compressed when the valve
is open and the lash adjuster will over-compress,
resulting in abnormal noise when the valve closes.
This is the same effect as if the valve clearance is
adjusted to be too large by mistake. If the air inside
the lash adjusters is then released, the operation
of the lash adjusters will return to normal.
up.
in the illustration at left and check if the abnormal noise
disappears. (The noise should normally disappear after
10 - 30 repetitions, but if there is no change in the noise
level after 30 repetitions or more, the problem is probably
not due to air inside the lash adjusters.)
shown in the illustration at left a further 5 times.
the noise has disappeared.