Engine (Sohc) Timing Belt Tension Adjustment - Mitsubishi 1989-1993 GALANT Service Manual

ENGINE <SOHC> - Service Adjustment Procedures
Symptom
The vacuum gauge reading is less than
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standard value, but the pointer is
stable.
The vacuum gauge pointer swings
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slowly.
The vacuum gauge pointer drops irre-
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The vacuum gauge pointer drops inter-
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6.3 in.Hg).
The vacuum gauge pointer drops sud-
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normal.
Timina mark
Camshaft sprocket
(3)
Remove the PCV
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value:
(5) If outside the standard value, isolate the
to the following table and repair the fault.
Cause
Ignition timing is retarded.
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The gas mixture is excessively
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rich.
The gas mixture is excessively
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lean.
take and exhaust valve seats.
Broken cylinder head gasket
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TIMING BELT TENSION ADJUSTMENT
There are 2 access holes in the timing
These can be used to readjust the tension of the timing belt by
the following procedure without removing the timing belt front
lower cover. However, timing belt "B", which drives the right
silent shaft, cannot be adjusted unless the cover is removed.
(1) Turn the steering wheel all the way to the left.
(2) Remove the left side undercover panel.
NOTE
This work is done so that the crankshaft can be turned.
(3) Place a piece of wood against the engine oil
(4) Remove the engine mounting bracket.
(5) Remove the timging belt front upper cover.
(6) Remove the four spark plugs.
(7) Turn the crankshaft clockwise and check the timing belt
condition.
(8) Turn the crankshaft clockwise and align the timing marks.
TSB Revision
hose from the PCV valve and attach a
Approx. 500 mmHg (20
Approx. 510 mmHg (20
cause by referring
R e m e d y
Adjust the ignition timing.
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Check Multiport Fuel Injection
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system.
Check Multiport Fuel Injection
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system.
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,Replace cylinder head gasket.
belt front lower cover.
p a n
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a n d j a c k