AEM 23-831BK Tru-Time Adjustable Cam Gear - Manual (Page 4)

Figure 2A
Figure 2B
ii) The oil pump shaft and crankshaft timing
marks are lined up with reference marks
on the front engine cover.
(1) It is important to examine the oil pump
pulley as the mark is not very easily
seen (it may be obscured by dirt). The
mark is a reverse embossed dot with
white paint on it.
(b) Loosen the center bolts on both cam gears.
i) These bolts are installed at 68 ft-lbs of
torque from the factory so do not rely
solely on the tension of the timing belt to
hold the cam gears in position.
ii) The camshafts have hex flats between
cylinders 1 and 2. Using an appropriately
sized wrench, hold the camshaft at the
hex flats as you loosen the cam gear’s
center bolt.
(c) Remove the timing belt from the two cam
gears. This is an appropriate time to replace
the timing belt if replacement is due or is
close to the replacement interval.
(d) Remove the two OE cam gears from both
camshafts.
(e) After removing the belt align the oil pump
sprocket with the previously identified marks
on the front of the engine. Fig 2B.
i) Remove the plug on the rear side of the
engine block and insert an 8mm rod into
the hole to lock the pump shaft in position.
(1) The oil pump shaft also includes the
counter-balance shaft. This shaft
needs to be locked in place during the
installation of the timing belt.
7. Installing the Tru-Time Cam Gears.
(a) Remove the cam gears from the packaging
and lay them down on a flat surface.
(b) Make sure that the timing marks on both
gears are set up at 0
° and tighten the bolts.
i) If the OE intake cam gear is equipped for
a cam angle sensor, remove the trigger
wheel from the OE cam gear and transfer
it to the Tru-Time gear that will be used for
the Intake side using the screws from the OE gear.
(c) Install the gears on to the camshafts. Tighten the bolts to the proper factory
specification (68 ft-lbs). As discussed in the removal section, hold the camshaft at the
hex flats as you tighten the gears.