CLOYES 9-3735 Quick Adjust Timing System Instruction Manual
- June 4, 2024
- CLOYES
Table of Contents
Installation Instructions
Cloyes® Quick Adjust™ Timing System
Notes: If you are using the 3-keyway crank sprocket and using the
advanced keyway, the maximum camshaft advance will be 8º and the maximum
retard will be 4º. If using the retard keyway, the maximum advance will be 4º
and the maximum retard will be 8º. Remember that the camshaft angle is half of
the crankshaft angle (Refer to the 3-keyway crank sprocket installation
instructions).
If Supplied: Install the Camshaft Thrust Bearing: The bearing has two races,
an inner indexing race, and an outer rotating race. You must install the
bearing with the inner race indexed against the machined surface of the
sprocket. Failure to install correctly will cause a severe wear issue! When
installed correctly the outer race will rotate freely.
The Cloyes® Patented Quick Adjust™ Timing System allows the installer to
adjust the camshaft timing up to 12°. Some camshaft manufacturers instruct the
user to advance or retard camshaft timing to enhance the characteristics of
their camshaft. By loosening six bolts and using the adjusting tool provided,
the user can infinitely adjust the camshaft timing up to 6° advance or 6°
retard.
To adjust the timing, loosen the six bolts that clamp the inner member of the
camshaft sprocket to the outer member about 1/4 turn counterclockwise. Insert
the adjustment tool into the slots provided. The short shaft of the adjustment
tool will be inserted into the short slot. The long shaft will be inserted
into the long slot and hole (Refer to the illustration below).
After the tool is inserted into the slots, use a 3/8 wrench to rotate the tool. There are seven timing marks indicated with an A and an R on the ends. Each timing mark is approximately 2° and is lined up with a single alignment mark on the outer camshaft sprocket member (Refer to the illustration below).
After the timing has been adjusted, remove the adjusting tool from the cam
sprocket. Tighten the six bolts to 13-15 ft-lb.
Note: The above illustrations are GM camshaft sprockets. However, the
adjustments are the same for Ford or Chrysler applications.
The Cloyes® 3-Keyway crank sprocket allows adjustment of the crankshaft timing by ±4°. Remember: The camshaft angle is half of the crankshaft angle, therefore the camshaft will correspondingly advance or retard by ± 2°. By changing the cam timing, enhancements to the camshaft characteristics can be achieved. For example, retarding the cam timing will increase high RPM horsepower, and advancing the cam timing will increase low-end torque. The following examples illustrate which timing mark is used with its corresponding keyway:
To retard the camshaft timing, use the timing mark on the crank sprocket and the retard keyway shown above.
For factory-specified timing, use the Ο timing mark on the crank sprocket and the factory keyway shown above.
To advance the camshaft timing, use the ∆ timing mark on the crank sprocket and the advance keyway shown above.
Notes:
If Supplied: Install the Camshaft Thrust Bearing: The bearing has two
races, an inner indexing race, and an outer rotating race. You must install
the bearing with the inner race indexed against the machined surface of the
sprocket. Failure to install correctly will cause a severe wear issue! When
installed correctly the outer race will rotate freely.
After determining which setting to use, we advise marking (with a white marker
or similar) the corresponding timing mark and keyway. This will make them
easier to identify during installation.
Some high-performance camshafts are ground with advanced or retard built-in.
In this case, the cam manufacturer intends the cam to be set at the factory-
specified timing.
Also, during and after installation, observe for any interference between the
timing set and engine block. If interference is found, remove or grind that
area of the block so adequate clearance is obtained. When removing a press fit
crank sprocket, a proper pulling tool should be used.
© Copyright 2014, Cloyes Gear & Products, Inc.
All rights reserved
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