Mitsubishi 3000GT 1991, Service Manual, Page: 78 / 1146

ENGINE Timing Belt
120"
Front bank
Front bank
12. INSTALLATION OF TIMING BELT
Align the timing marks on the respective sprockets.
In case of the camshaft sprockets in the front bank,
proceed as follows:
Install the crankshaft pulley. Shift the timing mark
on the crankshaft sprocket by three teeth to lower
the piston in No. 1 cylinder slightly from the top
dead center on compression stroke.
Caution
Turning the camshaft sprocket with the piston
in No. 1 cylinder located at TDC on compression
stroke may cause the valves to interfere with the
piston.
Make sure that the timing marks on the camshaft
sprockets for intake and exhaust valves are not
within the range A in the illustration at left.
If the timing mark is within range A, turn the
camshaft sprocket to move the timing mark to the
area closest to the range A.
Caution
In range A, the cam lobe on the camshaft lifts
the valve through the rocker arm and the
camshaft sprocket is apt to rotate by reaction
force of the valve spring. Therefore, be careful
not to have the finger pinched between the
sprockets.
Turn the camshaft sprocket for either the intake or
exhaust valve to locate the timing mark as shown in
the illustration at left. Then turn the other crankshaft
to locate the timing mark-as shown in the illustration
at left.
Caution
If the intake and exhaust valves of the same
cylinder lift simultaneously, interference with
each other may result. Therefore, turn the intake
valve camshaft sprocket and the exhaust valve
camshaft alternately.
Turn the camshaft sprocket clockwise to align the
timing marks.
If the camshaft sprocket has been turned excessive-
ly, turn it counterclockwise to align the timing
marks.
TSB Revision
Align the timing mark of the crankshaft sprocket.
NOTE
Shift the timing mark of the crankshaft sprocket one
teeth in counterclockwise direction to facilitate belt
installation.