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33 - D ADJUSTMENTS Article Text 1989 Volkswagen Golf For...

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D - ADJUSTMENTS Article Text 1989 Volkswagen Golf For Volkswagen Technical Site Copyright © 1998 Mitchell Repair Information Company, LLC Monday, August 23, 1999 11:45PM ARTICLE BEGINNING 1989 ENGINE PERFORMANCE Volkswagen On-Vehicle Adjustments Volkswagen; Cabriolet, Fox, Golf, Golf GT, Jetta & Vanagon ENGINE COMPRESSION ENGINE COMPRESSION TEST Check compression with engine warm, all spark plugs removed and throttle wide open. Ground coil wire from center of distributor cap to engine block. Disconnect one end of duct between airflow sensor and throttle body to disable fuel injection system. Crank engine through at least 6 compression strokes per cylinder to determine engine compression. ENGINE COMPRESSION TEST ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Model Standard Minimum psi (kg/cmý) psi (kg/cmý) Cabriolet ......... 131-174 (9.0-12.0) ........ 109 (7.7) Fox ............... 131-174 (9.0-12.0) ........ 102 (7.0) Golf & Jetta ...... 131-174 (9.0-12.0) ........ 102 (7.0) Golf GT ........... 145-189 (10.2-13.2) ....... 109 (7.7) GTI ............... 131-174 (9.0-12.0) ........ 109 (7.7) Vanagon ............ 87-131 (6.1-9.2) ......... 73 (5.2) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ VALVE CLEARANCE NOTE: All models use hydraulic lifters. No adjustments are required. IGNITION TIMING NOTE: Basic timing readings are only valid when engine idle speed and the idle mixture are within specifications. CHECKING & ADJUSTING All (Except Vanagon) 1) Warm engine to normal operating temperature (cooling fan should cycle at least once). Remove the 27 mm plastic plug from timing check hole on transaxle bellhousing (if equipped). 2) With ignition off, connect a tachometer and timing light to vehicle. Start engine and briefly raise engine speed above 3000 RPM a few times, then allow engine to idle normally. With distributor
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D - ADJUSTMENTS Article Text (p. 2) 1989 Volkswagen Golf For Volkswagen Technical Site Copyright © 1998 Mitchell Repair Information Company, LLC Monday, August 23, 1999 11:45PM vacuum hoses connected, timing mark on flywheel should appear adjacent to pointer in hole. 3) If an adjustment is needed, turn ignition off and loosen distributor hold-down bolt just enough to move distributor by hand. Start engine and allow to idle. Turn distributor until timing mark is aligned with pointer in bellhousing. Stop engine and tighten hold down bolt to 18 ft. lbs. (24 Nm.). Readjust if necessary and install plastic plug if removed. Fig. 1: Ignition Timing Mark All (Except Vanagon) Courtesy of Volkswagen United States, Inc. Vanagon 1) Warm engine to normal operating temperature. Stop engine and connect a tachometer and timing light to engine. Start engine and raise engine speed to a minimum of 2100 RPM at least 4 times, allowing throttle to close each time (this procedure must be repeated each time timing is checked). 2) Disconnect coolant temperature sensor connector before checking ignition timing. See Fig. 2. Increase engine speed to specification when checking ignition timing. Notch on V-belt pulley must align with parting line on crankcase.
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  • Spring '08
  • heydari
  • Distributor, Engine technology, Fuel injection, Ignition system, Volkswagen United States, Volkswagen Technical Site

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