ignition timing toyota corolla 4ac
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Filed Under (Toyota) by admin on 13-01-2011
NOTICE: Always turn the crankshaft clockwise. (c) Check that the timing marks of the camshaft timing pul- leys and No.3 timing belt cover are aligned. If not, turn the crankshaft pulley 1 revolution (360°). (d) Remove the crankshaft pulley bolt. IF REUSING TIMING BELT, CHECK INSTALLATION MARKS ON TIMING BELT Check that there are 3 installation marks and front mark on the timing belt. If the installation and front marks have disappeared, before re- moving the timing belt, place 3 new installation marks on the timing belt to match the timing marks of the timing pulleys, and place a new front mark on the timing belt. 18. 19. REMOVE TIMING BELT TENSIONER Alternately loosen the 2 bolts, and remove them, the belt ten- sioner and dust boot. 20. REMOVE TIMING BELT 21. (a) REMOVE RH CAMSHAFT TIMING PULLEY Using SST, loosen the pulley bolt. SST 09960–10010 (09962–01000, 09963–01000) Remove the bolt, knock pin and timing pulley. (b) 22. (a) REMOVE LH CAMSHAFT TIMING PULLEY Using SST, loosen the pulley bolt. SST 09960–10010 (09962–01000, 09963–01000) Remove the bolt, knock pin and timing pulley. (b) 23. REMOVE NO.2 IDLER PULLEY Remove the bolt and idler pulley. 24. REMOVE NO.1 IDLER PULLEY Using a 10 mm hexagon wrench, remove the pivot bolt, idler pulley and plate washer. 25. REMOVE CRANKSHAFT TIMING PULLEY Remove the timing pulley. HINT: If the pulley cannot be removed by hand, use SST and a service bolt to remove the timing pulley. SST 09950–50011 (09951–05010, 09952–05010, 09953–05020, 09954–05011)
Filed Under (Mitsubishi) by admin on 18-06-2010
IGNITION TIMING NOTE: Perform all adjustments with engine at normal operating temperature, cooling fan and accessories off, transmission in Park or Neutral, and front wheels in straight-ahead position. NOTE: Adjustment of ignition timing cannot be performed on vehicles equipped with Distributorless Ignition Systems (DIS). If ignition timing is not within specification, see CRANKSHAFT POSITION SENSOR in I – SYS/COMP TESTS article in this section. 1) Locate ignition timing adjustment connector. See IGNITION TIMING ADJUSTMENT CONNECTOR LOCATION table. Connect jumper wire between ignition timing adjustment connector and ground. Check ignition basic timing. 2) If ignition basic timing is not within specification, loosen distributor and rotate to adjust timing if necessary. See IGNITION TIMING SPECIFICATIONS table. Remove jumper wire from ignition timing adjustment connector.
Filed Under (Mitsubishi) by admin on 18-01-2011
1. Disconnect negative battery cable. Remove engine undercover. Place wooden block between jack and oil pan, and raise engine slightly. Remove engine mount assembly near timing belt cover. 2. Remove clamp for power steering return hose near timing belt cover. Remove all drive belts and tensioner pulley bracket. See Fig. 1 . Remove power steering and water pump pulleys. Rotate crankshaft clockwise so that No. 1 cylinder is at TDC of compression stroke. Remove crankshaft pulley. CAUTION: DO NOT rotate crankshaft counterclockwise. Ensure timing marks are aligned. If reusing timing belts, mark timing belts for direction of rotation. 3. Remove upper timing belt cover and gasket. Remove stub bolt of engine support bracket, and remove center timing belt cover. Remove lower timing belt cover. NOTE: Camshaft sprocket dowel pins will be in 12 o’clock position when timing marks are correctly aligned. 4. Ensure camshaft, crankshaft and oil pump sprocket timing marks are aligned. See Fig. 2 or Fig. 3 . Loosen tensioner pulley center bolt. Move tensioner to relieve timing belt tension. Remove timing belt. Remove timing belt auto tensioner. See Fig. 1 . 5. Remove plug from left side of cylinder block. Install a .31″ (8.0 mm) diameter Phillips screwdriver into the hole against balance shaft. See Fig. 4 . Screwdriver must go in at least 2.36″ (60 mm) or more. If screwdriver will only go in about .79-.98″ (20-25 mm) before striking balance shaft, turn sprocket one revolution and align timing mark. Keep screwdriver in place until timing belt is installed. This ensures balance shaft driven by oil pump sprocket remains in correct position. 6. To remove timing belt “B” (balance shaft belt), hold crankshaft sprocket stationary with a spanner wrench. Remove crankshaft sprocket bolt. Using gear puller, remove outer crankshaft sprocket. 7. Remove crankshaft sensing blade (if equipped). See Fig. 5 . Loosen timing belt “B” tensioner bolt. If reusing timing belt “B”, mark direction of belt rotation for reassembly reference. Remove timing belt “B”.
Filed Under (Ford) by admin on 08-03-2011
Checking Timing An access plug is provided in the cam drive belt cover so that camshaft timing can be checked without removal of the cover or any other parts. 1. Remove the access plug from the cam drive belt cover. 2. Rotate the crankshaft so that the No. 1 piston is rising on compression stroke. 3. Set the crankshaft to TDC by aligning the timing mark on the crank pulley with the TC mark on the belt cover. Always turn the engine in the direction of normal rotation (clockwise, as viewed from the front). Backward rotation may cause the timing belt to jump time, due to the arrangement of the belt tensioner. 4. Look through the access hole in the belt cover to make sure that the timing mark on the cam drive sprocket is lined up with the pointer on the inner belt cover. 5. Install the belt cover access plug. Adjusting Timing Belt SPECIAL SERVICE TOOL(S) REQUIRED Description Crankshaft Belt Tension Adjusting Tool T74P-6254-A 1. Remove the outer timing belt cover as outlined in this section. CAUTION: Attempting to adjust timing belt tension without loosening spring pivot bolt will break Crankshaft Belt Tension Adjusting Tool T74P-6254-A when relieving tension on the belt. 2. If belt timing or tension is incorrect, loosen timing belt spring pivot bolt. 3. Hold tensioner with Camshaft Belt Tension Adjusting Tool T74P-6254-A. 4. While holding tensioner, loosen adjusting bolt and gradually release spring tension. Loosening Timing Belt Tensioner, 2.3L Tool Number 8 — 5. Using adjusting tool, pry tensioner away from belt. While holding, tighten adjusting bolt. There should be no tension on belt. Camshaft Timing Belt, 2.3L I-4 Timing Mark on Camshaft Sprocket Remove the bolts holding the crankshaft position sensor in place and pull the sensor assembly free of the dowel pin. 7. Remove the crankshaft pulley , crankshaft pulley hub and timing belt guide. 8. Remove the drive belt and inspect it for wear or damage. If the belt is damaged, replace it. 9. Remove one spark plug from each cylinder. 10. If not done: a. Loosen tensioner adjusting bolt. b. Using Camshaft Belt Tension Adjusting Tool T74P-6254-A, pry tensioner clockwise against spring tension as far as possible. c. Tighten adjusting bolt to hold tensioner in released position. 11. Align crankshaft so number one piston is at TDC (top dead center) as indicated by timing mark. 12. Line up camshaft sprocket timing mark with inner timing belt cover timing mark and key is pointing down.
Filed Under (Honda) by admin on 03-01-2011
Spark Check for spark at secondary coil wire and each spark plug wire using a spark tester. If spark is not present, continue with following tests. Check spark plug wire resistance on suspect wires. Resistance should be less than 25,000 ohms. Ignition Coil Power Source 1. On Civic, remove distributor cap to check power source directly at coil. On all models, disconnect ignition coil primary leads. Turn ignition on. Using voltmeter, check voltage between ground and Black/Yellow wire terminal of ignition coil harness. 2. Battery voltage should be present. If battery voltage is not present, check for open in Black/Yellow wire between coil and ignition switch. Ignitor Power Source Turn ignition off. Disconnect harness connector at distributor. Turn ignition on. Using voltmeter, check for battery voltage between ground and Black/Yellow wire of harness. If voltage is not present, check for open in Black/Yellow wire between ignition coil and harness connector. If wire is okay, check ignition coil resistance (for internal short to ground). Ignitor Check Check TDC/CRANK/CYL sensor resistance values. See TACH PULSE SIGNAL . Check power sources. If no problems are found and spark is not present, replace ignitor. Ignition Coil Resistance (Accord & Prelude) 1. Remove primary and secondary leads from ignition coil. Using an ohmmeter, check resistance between primary terminals “A” and “C” (“A” and “B” for Prelude) of ignition coil. See Fig. 2 . Resistance should be .6-.8 ohm at room temperature. 2. On Accord, check resistance between terminals “B” and “D” of ignition coil (tachometer circuit). Resistance should be about 2090-2310 ohms at room temperature. 3. On all models, check secondary resistance between terminal “A” and secondary output terminal (coil tower). See IGNITION COIL RESISTANCE table. Check for continuity between terminals “A” and “B” (“A” and “C” for Prelude). Continuity should exist. If readings are not within specification, replace coil.