GM 89059409 Plate Kit,Clutch Pressure & Driven (W/ Cover)

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The pressure plate should be inspected for wear or damage on the machined surfaces and diaphragm spring fingers.

The removal process involves accessing the clutch components by removing the transmission while leaving the engine in place, with the engine supported, preferably using an engine hoist, or a jack with a piece of wood between it and the oil pan to avoid damage to the oil pump pickup. Care must be taken as the oil pan is close to the pickup. The release cylinder should be removed first. For heavy-duty (cast iron case) transmissions, the bellhousing-to-engine bolts should be removed, and the housing may need gentle prying to detach from alignment dowels. The clutch fork and release bearing can remain attached to the housing. An alignment tool is recommended to support the clutch disc during removal. The flywheel and pressure plate should be carefully inspected for indexing marks or scribed marks for proper alignment. The pressure plate-to-flywheel bolts should be gradually loosened in a criss-cross pattern and removed, followed by the pressure plate and clutch disc. Upon inspection, it is advised to examine all clutch components, including the clutch driven plate assembly (clutch disc), flywheel for defects, and the pilot bearing. The clutch disc should have at least 1/16-inch of lining above the rivet heads, and loose rivets, distortion, cracks, and other damage should be checked for. The release bearing and the machined surfaces and diaphragm spring fingers of the pressure plate should also be inspected for wear or damage, with the pressure plate replaced if necessary. Cleaning the flywheel and pressure plate surfaces with lacquer thinner or acetone is crucial before installation to ensure no oil or grease is present. The clutch disc and pressure plate should be positioned against the flywheel with an alignment tool, ensuring proper installation, and the pressure plate-to-flywheel bolts should be tightened gradually in a criss-cross pattern. The clutch disc should be centered using the alignment tool before final tightening of the bolts. Lubrication of the release bearing, release lever contact areas, and transmission input shaft bearing retainer with high-temperature grease is essential before installing the clutch release bearing. Finally, reinstallation of the transmission, release cylinder, and all previously removed components is necessary, with all fasteners tightened to recommended torque specifications.