1994 Mazda 929 Service & Repair Manual Software

3.0L V6 Article Text 1993 Mazda 929 For Techdoc Ltd. Copyright © 1997 Mitchell International Wednesday, March 24, 1999 10:52PM ARTICLE BEGINNING 1992-93 MAZDA ENGINES 3.0L V6 929 * PLEASE READ THIS FIRST * NOTE: For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section. ENGINE IDENTIFICATION Engine code and number are stamped on rear of cylinder block, above flywheel. See Fig. 1. Engine identification code information is not available from manufacturer. Fig. 1: Identifying Engine Code & Number Location Courtesy of Mazda Motors Corp. ADJUSTMENTS VALVE CLEARANCE ADJUSTMENT 1) No valve clearance adjustment is required, as Hydraulic Lash Adjusters (HLA) are used. If noise exists when engine is started, operate engine at 2000-3000 RPM for 10 minutes. 2) If noise stops, valve lash adjuster is operating correctly. If noise still exists, check engine oil level and oil pressure. Oil pressure should be within specification. See ENGINE LUBRICATION SYSTEM under ENGINE OILING. If oil pressure is not within specification, check for defective engine components. 3) If oil pressure is okay, remove valve cover. Push downward on valve lash adjuster. If valve lash adjuster pushes downward,

3.0L V6 Article Text (p. 2) 1993 Mazda 929 For Techdoc Ltd. Copyright © 1997 Mitchell International Wednesday, March 24, 1999 10:52PM replace valve lash adjuster. See VALVE LASH ADJUSTER under REMOVAL & INSTALLATION. If valve lash adjuster does not push downward, check for worn or damaged camshaft and components. NOTE: DO NOT remove HLA unless necessary, as "O" ring may be damaged during removal. Before installing valve cover, apply sealant on cylinder head at designated areas. See Fig. 10. REMOVAL & INSTALLATION NOTE: For installation reference, label all electrical connectors, vacuum hoses and fuel lines before removal. Also place mating marks on engine hood and other major assemblies before removal. CAUTION: When battery is disconnected, radio will go into anti-theft protection mode. Obtain radio anti-theft protection code from owner and deactivate radio anti-theft function prior to disconnecting battery. FUEL PRESSURE RELEASE Start engine and disconnect fuel pump relay, located on right side of engine compartment, near battery. See Fig. 2. After engine dies, turn ignition off and reconnect fuel pump relay. Fig. 2: Locating Fuel Pump Relay Courtesy of Mazda Motors Corp. ENGINE Removal 1) Release fuel pressure. See FUEL PRESSURE RELEASE under REMOVAL & INSTALLATION. Disconnect battery cables and remove battery and battery tray. Remove hood. Raise and support vehicle. Remove undercover. Drain engine oil. Disconnect exhaust pipes from exhaust manifolds. 2) Disconnect and plug automatic transmission cooling lines from radiator. Lower vehicle and drain engine coolant. Remove fresh

3.0L V6 Article Text (p. 3) 1993 Mazda 929 For Techdoc Ltd. Copyright © 1997 Mitchell International Wednesday, March 24, 1999 10:52PM air duct, air cleaner and air intake tube. Disconnect accelerator cable. 3) Remove cooling fan and fan shroud. Remove radiator hoses and all drive belts. Remove spark plug cables and spark plugs. Remove canister and power brake vacuum hoses. Cover fuel hose fitting with rag to prevent fuel spray during removal. Remove fuel hoses as necessary. Plug disconnected hoses to prevent fuel leakage. Remove appropriate wiring and hoses and remove upper intake manifold. 4) Disconnect heater hoses from engine. Disconnect engine wiring harness. Remove radiator wiring harness and radiator. Remove alternator and adjusting bracket. Remove A/C compressor and power steering pump, and tie them aside with hoses still connected. Support transmission and remove engine-to-transmission bolts. Remove engine mount nuts and remove engine. Installation To install, reverse removal procedure. Adjust tension of all drive belts. Restore all fluids to proper level. Prime fuel system by connecting jumper wire between data link connector terminals F/P and GND in engine compartment. See Fig. 3. Turn ignition switch to ON position for 10 seconds. Check for fuel leaks. Turn ignition switch to OFF position. Remove jumper wire. Fig. 3: Identifying Data Link Connector Terminals Courtesy of Mazda Motors Corp. INTAKE MANIFOLD Removal 1) Apply parking brake, and block rear wheels. Release fuel pressure. See FUEL PRESSURE RELEASE. Disconnect negative battery cable. Remove fresh air duct, air cleaner and air intake tube. Disconnect accelerator cable. Remove canister and power brake vacuum hoses. 2) Cover fuel hose fitting with rag to prevent fuel spray during removal. Remove fuel hoses as necessary. Plug disconnected hoses to prevent fuel leakage. 3) Remove automatic transmission vacuum hose. Disconnect engine wiring harness connectors and grounds. Remove distributor.

3.0L V6 Article Text (p. 4) 1993 Mazda 929 For Techdoc Ltd. Copyright © 1997 Mitchell International Wednesday, March 24, 1999 10:52PM Remove upper intake manifold bolts and upper intake manifold. Loosen intake manifold bolts in 2 steps and in sequence. See Fig. 4. Remove intake manifold. Installation Using NEW gaskets and "O" rings, install intake manifold. Tighten bolts in 2 steps to specification and in proper sequence. See Fig. 4. See TORQUE SPECIFICATIONS TABLE at the end of this article. Ensure all electrical and vacuum lines are properly connected. To complete installation, reverse removal procedure. Fig. 4: Intake Manifold Loosening & Tightening Sequence Courtesy of Mazda Motors Corp. EXHAUST MANIFOLDS Removal & Installation Remove exhaust manifold nuts at exhaust pipe. Remove exhaust manifold heat shields and exhaust manifolds. To install, reverse removal procedure. Install NEW gaskets. Tighten fasteners to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. CYLINDER HEAD

3.0L V6 Article Text (p. 5) 1993 Mazda 929 For Techdoc Ltd. Copyright © 1997 Mitchell International Wednesday, March 24, 1999 10:52PM Removal 1) Apply parking brake, and block rear wheels. Release fuel pressure. See FUEL PRESSURE RELEASE. Disconnect negative battery cable. Drain engine coolant. Remove air intake hose. Disconnect accelerator cable from throttle body. Remove spark plug cables and spark plugs. 2) Remove cooling fan and fan shroud. Remove all drive belts. Remove A/C idler pulley. Remove crankshaft pulley and sensor rotor. DO NOT damage sensor rotor. Remove coolant by-pass and upper radiator hose. 3) Remove timing belt cover and gasket. See Fig. 5. Turn crankshaft to align match marks of pulleys. See Fig. 6. Remove timing belt upper idler pulley. Remove timing belt and timing belt automatic tensioner. Mark timing belt rotation direction if belt is to be reused. Fig. 5: Exploded View Of Timing Belt Components Courtesy of Mazda Motors Corp.

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1994 Mazda 929 Service & Repair Manual Software

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