Disassembly of Engine English and Metric Fasteners It is beyond the scope of this Section to cover in detail the many different accessory installations. Refer to the appropriate service manual section for this information. Diagrams of emissions and vacuum hose routings, wiring harness routing, accessory drive belt layout, etc. should be made before removing accessories. Cleaning It is important that the engine be as clean as possible to prevent dirt from entering critical areas during disassembly. Remove the engine accessories before cleaning, to provide better access to the engines exterior surfaces.
After removing the TBI unit, distributor, etc., cover the openings with tape to prevent the entry of contaminants. Methods used to clean the engine will depend on the means which are available. Steam cleaning, pressure washing, or solvent cleaning are some of the acceptable methods. Allow the engine to dry thoroughly before beginning any work. Draining The Engine Remove or Disconnect 1 . Oil pan drain plug and washer. IMPORTANT: Allow the oil to drain into a proper container. 2 . Oil filter. 3 . Coolant drain plug and/or knock sensor from the block. IMPORTANT: Allow the coolant to drain from the block into a proper container. Install or Connect NOTICE : Refer to “Notice” on page 1. 1 .
Oil pan drain bolt. 2 . Coolant drain plug and/or knock sensor into the block. CAU TIO N Late model engines use a combination of English and Metric threaded fasteners. The components effected are starter motor, engine mounts, and flywheel housing mounting. Verify that the proper fasteners are used whenever removing or replacing one of these components. Tools And Shop Equipment A clean well-lit work area should be available. Other necessary equipment includes: a suitable parts cleaning tank, compressed air supply, trays to keep parts and fasteners organized, and an adequate set of hand tools.
An approved engine repair stand will aid the work and help prevent personal injury or component damage. Special tools are listed and illustrated throughout this Section with a complete listing at the end of the Section. These tools (or their equivalents) are specially designed to quickly and safely accomplish the operations for which they are intended. The use of these special tools will also minimize possible damage to engine components. Some precision measuring tools are required for inspection of certain critical components. Torque wrenches are necessary for the correct assembly of various parts.
Accessory Removal The various procedures in this manual assume that the engine accessories have been removed. These accessories may include one or more of the following: • Hydraulic Pump • Drive Belt Tensioner • Alternator • Cooling Fan • Distributor • Accessory Mounting Brackets • Starter Motor • Carburetor / Mixer Components G643 (E) Service Manual Chapter 3. Engine Mechanical System 60