The installation of a Monster Clutch, particularly the S Series Twin Disc, requires careful attention to detail, especially regarding torque specifications and rotational positioning of the flywheel and pressure plate. Proper clutch setup involves precise measurement of tolerances to ensure optimal performance and prevent drivability issues. This article details procedures and recommendations based on available documentation and user reports.
Initial Installation Considerations
During the installation process, a common challenge arises when attempting to torque the pressure plate bolts without being able to rotate the flywheel assembly. The documentation suggests utilizing a crank stop tool, often found online by searching for “ls1 flywheel crank lock,” to prevent rotation during the initial torque stage. One user describes using an inexpensive Amazon-sourced crank stop that bolts in place of the starter.
The initial step involves seating the flywheel and then installing the crank stop. Subsequent steps include torquing the flywheel to the crankshaft. Following this, the clutch disk and pressure plate are installed. While some installations may allow for torquing the pressure plate without rotating the engine, situations may arise where rotation is necessary.
Rotating the Flywheel Assembly
If rotation of the flywheel assembly is required during pressure plate bolt torque, several methods are suggested. One method involves carefully using a medium-sized pry bar to engage the teeth on the flywheel and rotate it incrementally. Another technique utilizes a lower bolt for the inspection cover, positioned near the ring gear, as a pivot point for a flathead screwdriver. This method allows for rotation in small increments, approximately four to five teeth at a time.
It is noted that installations are often easier when the engine is removed from the vehicle.
Measuring Clutch Setup Tolerances
According to Steve Addison, Owner/Operator of Monster Clutch Company, it is crucial to measure clutch setup tolerances every time a clutch is installed. This is to avoid potential drivability issues. The process begins with installing the clutch on the flywheel and properly torquing the mounting bolts. Before taking measurements, the slave spring must be removed, and the bearing must be fully seated at the bottom of its travel, resting on the slave’s base.
Two measurements, designated “A” and “B,” are required. Measurement “A” represents a specific dimension within the clutch system, while measurement “B” represents another. The gap measurement is determined by subtracting “B” from “A.”
Interpreting Gap Measurements and Shimming
The resulting gap measurement dictates whether shimming is necessary. If the gap measurement exceeds 0.200 inch, a shim should be added between the slave and the transmission to bring the measurement within the acceptable tolerance. Monster Clutches recommends a gap measurement between 0.0625 inch and 0.200 inch, with an ideal gap between 0.085 inch and 0.100 inch.
A negative gap measurement (where “B” is greater than “A”) indicates an issue requiring further investigation.
Shim Options and Availability
Monster Clutches offers a shim kit containing precision-cut shims of varying thicknesses, ranging from 0.040 inch to 0.125 inch. This allows for fine-tuning of the clutch setup. Alternatively, shims can be custom-made to specific thicknesses as needed. Monster Clutches is capable of producing shims to any specified thickness.
Conclusion
Successful Monster Clutch installation requires attention to detail, particularly when torquing the pressure plate and measuring clutch setup tolerances. Utilizing a crank stop tool can facilitate the initial torqueing process. When rotation is necessary, careful application of a pry bar or a screwdriver against the flywheel teeth can achieve incremental movement. Accurate measurement of the gap between components, and the subsequent use of shims if necessary, are critical for optimal clutch performance and preventing future drivability concerns. Following these guidelines, as recommended by Monster Clutch Company, will contribute to a smooth and reliable gear-changing experience.