Flywheel Installation Guide

Flywheel Installation Instructions- Must Read Before Installing Flywheel

Because of the complexity of some applications, Collins recommends that an experienced, certified mechanic install your flywheel. If you are capable, be sure to refer to the factory service manual for proper removal and installation. 

Regardless of the bolts to be used they must be checked for proper length (See illustration below). Make sure that the flywheel bolts thread properly into the crankshaft smoothly and with no binding. Once your flywheel is installed, it is critical to make sure that it is seated flush to the crank and that is has clearance with the rear main seal. 

Check Bolt Length-
1. Hand tighten the flywheel bolt into the crankshaft without the flywheel, Note measurement "B".
2. Measure "A". Include torque plate if supplied. 
3. Subtract A-B=Clearance.
**There must be a minimum of .080'' to .100'' of clearance in threaded hold in the crankshaft.
**If you are using other than OEM fasteners tighten flywheel to crank and pressure plate to flywheel bolts per that manufacturers recommendations.
**It is important not to allow any threadlocker to seep between the flywheel and the crankshaft flange.

The following procedure is the correct method for torquing your flywheel:
1. Using torque plate (if supplied) insert and tighten all fasteners evenly in a cross hatch pattern to 20ft/lbs.
2. Removing one fastener at a time apply Loctite threadlocker or equivalent to the flywheel bolt threads re-install and tighten 20ft/lb. Continue with the remaining fasteners. 
3. Continue to torque all flywheel-to-crankshaft bolts to correct specifications.

Important: If fasteners are supplied or a non yield-to-torque fastener is used see the bolt torque chart for specifications. Improper tightening could cause the fasteners to fail.

DO NOT use an impact driver to tighten flywheel to crankshaft bolts.