AEM 23-850BK Tru-Time Adjustable Cam Gear - Manual (Page 3)

Read and understand these instructions BEFORE attempting to install this
product.
1) It is important that the installer familiarize themselves
with the procedures before starting the installation. This
procedure requires some very specialized tools, which
cannot be substituted with any substandard equipment.
It is important to have a factory service manual
available for reference while undertaking this
installation. This procedure is best accomplished using
a lift. If a suitable lift is not available, for safety reasons,
use appropriately rated jackstands.
2) Disconnect the negative battery cable.
3) With the front of the vehicle raised, drain the coolant
from the radiator. The drain plug for the radiator is
located just to the right of the lower radiator hose (when
viewed from underneath). Make sure to collect all the
coolant in a clean container so that it can be re-used.
a) Disconnect the upper radiator hose and remove
from the area of work.
b) Disconnect the coolant line located to the right of
the radiator hose and position it away from the area
of work.
4) Remove all the accessory drive belts.
See Timing Belt System
Diagram
a) Alternator drive belt
b) Air conditioning and power steering pump belt.
5) Remove the right front wheel.
a) Remove the right inner splash shield and the right
engine-mount bolt access plug.
See Figure 1
6) Position a jack underneath engine for support.
a) Disconnect and remove the purge solenoid valve
from the right front engine mount. Mark the vacuum
lines before you remove the valve so that they can
returned to their original positions.
b) Remove the two engine mount to frame rail bolts
on either side of the engine mount.
See Figure 2
c) From the wheel well loosen the engine mount
through bolt.
d) Jack the engine up until the engine mount clears
the frame rail and then remove the engine mount
through bolt.
7) Remove the power steering pump. This will allow you to
move the power steering hoses from the front of the
engine. Try not to disconnect any hoses to prevent
leakage. If any hoses are disconnected, any o-rings at
the banjo connections at the top of the pump will need
to be replaced. You will also need to prevent any
contamination of the power steering pump.
See Figures 3&4
a) Remove two bolts at the back of the rear bracket
and loosen one bolt on the front bracket.
b) Lift the pump up to clear the engine and lay the
pump on the cam cover.
8) Remove the front bracket plate.
See Figure 7
a) Remove the bolts on the front bracket plate and lift
the bracket out of the engine compartment. The
bolts for the front bracket plate are quite long so lift
the engine as needed to obtain the necessary
clearance but be careful that other engine
components are not damaged in any way resulting
from jacking the motor too high.
9) Remove the front crankshaft pulley.
See Figure 5
a) The stock pulley is an assembled component. In
most cases a weld gap is evident on the area
where the Poly-V alternator belt rides. This is the
normal appearance of the pulley but it does not
represent a timing mark of any kind. There are no
timing indicators on the front crank pulley.
i) Loosen and remove the center bolt of the
pulley. The bolt is installed from the factory
using thread-locking compound on the pulley
center bolt.
b) The pulley does not have any timing marks on it
nor is it keyed to the crankshaft. The pulley is
pressed on and requires a three-jaw puller to
remove it from the crankshaft.
i) WARNING
(1) Do not use pry bars against the rear of the
pulley or against the front cover of the
engine. Damage to the pulley or the front
engine cover could result.
c) Install the puller as depicted in the diagram but
ensure that the center bolt of the puller remains
straight and centered on the pulley.
d) Once the pulley has been removed you can take
the front engine cover off by removing the two
lower attaching bolts and the top center bolt.
10) Remove the timing gear cover
See Figure 7
a) Remove the upper access panel. This is held in
place with a single bolt.