AEM 23-830BK Tru-Time Adjustable Cam Gear User Manual

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Figure 2A and 2B

7. Removing the timing belt

(a) Rotate the crankshaft so that the number 1

piston is at TDC on compression. Verify that
the camshafts are in proper timing for this
position.
i) The dowel pins near the center of each

gear will be at the 12 o’clock position.

ii) Each gear will have 2 marks at 180

apart. At TDC these marks will line up
horizontally.

iii) 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.

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.
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.

8. 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.