AEM TruTime Adjustable Cam Gear 23830BK User Manual

ADVANCED ENGINE MANAGEMENT INC. 
2205 126th. St. Unit A 
Hawthorne, CA 90250 
Http://www.aempower.com
 
Instruction part # 10-253 
© 2003 Advanced Engine Management, Inc. 
 
 
 
 
TRU-TIME 
CAM 
GEARS 
 
Mitsubishi Eclipse Turbo 
Part number 23 – 830 series 
 
WARNING: 
,! 
This installation is not for the mechanically challenged! If you 
are not mechanically inclined or do not understand the 
procedure please do not attempt the installation. Refer the 
installation to a reputable mechanic. It is highly...

 
 
You have just purchased the BEST adjustable cam sprockets available. These AEM billet 
aluminum adjustable cam sprockets are CNC machined from billet aluminum and then laser 
etched with cam timing marks for adjustment up to ±10° at the cam or ±20° at the crankshaft. 
Using the vernier scale on the sprocket hub helps to do the cam timing changes quickly and 
accurately. The inner hub is anodized for lasting beauty and resistance to corrosion. The out 
gear sector is hard anodized for resistance to...

 
 
Figure 1A and 1B 
Read and understand these instructions BEFORE attempting to install this 
product. See reference to diagrams on back page. 
1.  All Tru-Time Cam Gears for Mitsubishi have provisions for the cam angle sensor that is 
mounted behind the intake cam gear on the 1995 to 1996 Mitsubishi Eclipse. The models 
starting with the 1997 model year have the cam angle sensor mounted at the rear of the 
cylinder head. 
2.  The procedure to change the gears is identical to the timing belt...

 
 
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...

 
 
Figure 3A, 3B, and 3C  
(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. 
(d) From the exhaust cam remove the bolt that is at the 10 o’clock position and from the 
intake cam remove the bolt from the 2 o’clock position. 
 
9. Installing timing belt 
(a) Install the timing belt on the intake cam. Make 
sure that the gear is at the proper...

 
 
Figure 4 
10. Resetting the tension pulley 
(a) The following procedures are to be completed if the tensioner pulley was loosened 
during the removal of the timing belt. 
(b) With the automatic tensioner in place, loosen the tension pulley-fixing bolt. 
(c) With a suitable tool rotate the tension-pulley 
counter clockwise and apply 3 ft-lbs to the 
center eccentric while tightening the fixing 
bolt. Do not allow the eccentric to rotate with 
the center bolt as you tighten it (refer to 
factory...

 
 
on the street and STRONGLY recommend the timed acceleration tests be carried 
out at a racetrack.) The method we use to perform the timed tests is to start at a 
constant engine RPM in second gear (both for manual and automatic transmission) and 
then accelerate to the vehicle redline while recording the time it takes to reach redline. 
We perform this test at least 3 times to establish an average reference point. Notice that 
there is no shifting or tire burning (if you do have a traction problem,...

 
 
Reference to diagrams: 
 
Figure 1A 
Diagram showing the arrangement of spark plug wires and top center cover. 
Figure 1B 1.  Drive belt (alternator) 
2.  Drive belt (power steering) 
3.  Tensioner pulley bracket (air conditioner) 
4.  Drive belt (air conditioner) 
5.  Pulley (water pump) 
6.  Pulley (power steering) 
7. Pulley (crankshaft) 
8.  Timing belt cover (upper) 
9.  Timing belt cover (center) 
10.  Timing belt cover (lower) 
11. Timing belt 
12.  Tensioner pulley (timing belt) 
13.  Auto...