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 (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 (Daewoo) by admin on 05-04-2011
Removal 1. Disconnect negative battery cable. Disconnect intake air temperature sensor connector from intake air duct. Disconnect the air intake tube from the throttle body. Disconnect the breather tube from the valve cover. Remove the air filter housing. 2. Raise and support the vehicle. Remove right front wheel. Remove right front splash shield from wheelwell. Remove serpentine accessory drive belt. 3. Remove crankshaft pulley bolts. It is NOT necessary to remove crankshaft sprocket center bolt. Remove crankshaft pulley. Lower vehicle. 4. Support engine assembly from above with Support Fixture (J-28467-B). See Fig. 1 . Remove engine mount bracket from timing belt end of engine. See Fig. 2 . 5. Remove front timing belt cover. Using crankshaft center bolt, rotate crankshaft one full turn clockwise (as viewed from timing belt end of engine). 6. Align mark on crankshaft sprocket with notch at bottom of rear timing belt cover. See Fig. 3 . Align camshaft sprocket timing marks with notches on valve cover. See Fig. 4 . CAUTION: Engine damage could result if camshaft sprockets are not properly aligned with notches on valve cover. 7. Loosen the automatic tensioner bolt. Use an Allen wrench to rotate tensioner and relieve tension on timing belt. See Fig. 5 . Remove timing belt. Installation 1. Ensure crankshaft and camshaft timing timing marks are still aligned. Install the timing belt. See Fig. 6 . Turn the timing belt tensioner clockwise to tension the timing belt. Turn tensioner until the pointer aligns with the notch on the rear timing belt cover. Tighten automatic tensioner bolt. See TORQUE SPECIFICATIONS . 2. Using crankshaft center bolt, turn crankshaft clockwise (as viewed from timing belt end of engine) 2 full revolutions. Ensure timing belt tensioner pointer is still aligned with notch. 3. If timing belt tensioner is correctly aligned, install timing belt cover. Install the engine mount bracket on the timing belt end of engine. Install crankshaft pulley. Install serpentine accessory drive belt. Install right front splash shield. Install right front wheel. 4. Install air filter housing. Connect air intake temperature sensor connector. Connect negative battery cable.
Filed Under (Rover) by admin on 05-06-2011
The above application is prone to the timing belt teeth lifting off the belt in service due to operating the belt with insufficient tension. The following instructions have been produced to assist in the fitting of your new timing belt, giving simple hints and tips, which should help avoid problems caused by adopting an incorrect fitting / adjustment procedure. For instructions for the removal of the engine components required to gain access to the timing belt, please refer to the vehicle workshop manual. Note:- Incorrect tension of the timing belt, can lead to the teeth lifting from the belt, resulting in belt failure, and subsequent major engine damage. Special Tools Required: 1) Timing belt tension gauge, (accurately calibrated), Part No’s: either Rover KM4088 or Borroughs BT33-86F 2) Two 8mm Allen keys (for tensioner adjustment) 3) Short length of round steel bar (for flywheel timing location) Fitting Procedure: 1) Before the old timing belt is removed, the crankshaft should be rotated clockwise to align the timing mark on the crankshaft pulley with the edge of the metal bracket, which forms part of the lower timing belt cover (See I). To lock the crankshaft in this position, which is 90 degrees before top dead centre, insert a steel rod of the correct diameter into the hole on the gearbox / engine adaptor plate, positioned on the front facing lower edge of the cylinder block (See diagram B), and locate with the corresponding hole in the flywheel. The timing marks on the camshaft gears should now be aligned at the 3 o’clock position for the left hand gear, and the 9 o’clock position for the right hand gear (See II). Undo the timing belt tensioner Allen bolt and remove tensioner. The old timing belt can now be removed (See III). Check the condition of the geared teeth on the camshaft, crankshaft, and water pump drives. Check the tensioner, water pump, and idler bearings. Fit the new timing belt over the drive gears, ensuring the timing marks set at ‘I’and‘II’ have not moved. Refit the tensioner using the anti-slip washer ‘IV’ supplied with the new timing belt. The anti-slip washer should be fitted between the tensioner and the backplate, with the abrasive side facing towards the tensioner. Note: A new anti-slip washer must always be fitted. Non modified vehicles will not have the anti-slip washer fitted. Rotate the tensioner, using the Allen key drive to set the initial pre-load tension, sufficient to prevent the timing belt from slipping over the toothed drives, then tighten the Allen bolt to 45Nm.
Filed Under (Pontiac) by admin on 25-08-2010
Note: GM does not provide timing chain timing marks, or information to perform timing chain service without the special tools shown in this procedure. Tools Required: – - J 36800 Camshaft Sprocket Timing Alignment Pin J 39579 Camshaft Sprocket Wrench Important: ^ ^ Before remove the timing chain, read the entire procedure. The timing chain on the engine is not to be replaced with the timing chain from any other model year. The timing sprockets are different on the engine and the shape of the links matches the sprockets. Engine damage may result if the wrong timing chain is used. The timing chain and the crankshaft sprocket must be marked in order to insure reassembly with the same side facing out at the time of reassembly. ^ Caution: Refer to Battery Disconnect Caution in Service Precautions. 1. Disconnect the negative battery cable. 2. Remove the engine front cover. Refer to Engine Front Cover Replacement. 3. Rotate the crankshaft clockwise (as viewed from the front of the engine, normal rotation) until the camshaft sprocket timing dowel pin holes line up with the holes in the timing chain housing. 4. The crankshaft sprocket keyway should point upwards and line up with the centerline of the cylinder bores. This is the Timed position. 5. Remove the timing chain guides. 6. Raise and support the vehicle. Refer to Vehicle Lifting. 7. Ensure that all of the slack in the timing chain is above the tensioner assembly. 8. Remove the timing chain tensioner. 9. The timing chain must be disengaged from any wear grooves in the tensioner shoe in order to remove the shoe. Slide a screwdriver blade under the timing chain while pulling the shoe outward. Notice: Do NOT attempt to pry the sprocket off the camshaft or damage to the sprocket or chain housing could occur. 10. If difficulty is encountered in removing the timing chain tensioner shoe, use the following procedure in order to remove the intake camshaft sprocket: 10.1. 10.2. 10.3. 10.4. Lower the vehicle. Hold the intake camshaft sprocket with the J 39579 and remove the sprocket bolt and washer. Remove the washer from the bolt and rethread the bolt back into the camshaft by hand (the bolt provides a surface to push against). Remove the intake camshaft sprocket. Use a three-jaw puller in the three relief holes in the sprocket.