Skip to content

how to remove timing cover on h3 hummer

You search PDF repair manual about how to remove timing cover on h3 hummer, if there are search results will appear below. If search results do not exist, please search by others keyword.


Removal 1. Disconnect negative battery cable. Raise and support vehicle. Drain engine oil. Remove right front wheel and splash shield. Put a block of wood between cradle and engine torque strut at bottom front end of engine. See Fig. 2 . 2. Remove mount from upper front end of engine, allowing engine to rest on wood block. Remove accessory drive belt and tensioner. Remove accessory belt idler. Remove cylinder head cover. 3. Replace silicone isolators on cylinder head cover screws if deteriorated. Remove power steering pump (leave hoses attached). Remove A/C compressor (leave hoses attached). Raise and support vehicle. Drain engine oil. Remove right front wheel and splash shield. 4. Remove support bracket between intake manifold and engine block. Remove front balancer/pulley using a 3-jaw puller. Disconnect exhaust pipe from exhaust manifold. Install Crankshaft Gear Retainer (SA9104E) onto end of crankshaft, with flat side toward crankshaft gear (sprocket). Crankshaft gear retainer holds crankshaft gear in place during removal of front cover. 5. Remove 4 bolts from front end of oil pan. Using RTV Cutter (SA9123E), cut RTV sealant between oil pan and front cover. Spray penetrating oil onto front cover dowel pins. Remove front cover bolts (one bolt is located above accessory drive belt pulley). Pry front cover from engine block. 6. To prevent pistons from hitting valves, turn crankshaft 90 degrees clockwise as viewed from front of engine until timing mark and keyway are aligned with split line of main bearing cap. Remove timing chain tensioner, guides and chain. While using a 7/8″ (21 mm) wrench to keep camshaft(s) from turning, remove camshaft sprocket bolt(s). Remove camshaft sprocket(s). Installation 1. To prevent pistons from hitting valves, ensure timing mark and keyway on crankshaft are aligned with split line of main bearing cap. Install camshaft sprocket(s) with the letters FRT (front) facing away from cylinder head. Use a 7/8″ (21 mm) wrench to keep camshaft(s) from turning. 2. Install and tighten camshaft sprocket bolt(s) to specification. Rotate camshaft(s) until a 3/16″ (4.8 mm) drill bit can be inserted through timing pin hole(s) and into cylinder head. See Fig. 5 or Fig. 6 . 3. Rotate crankshaft counterclockwise as viewed from front of engine until timing marks at crankshaft sprocket are aligned. Install timing chain, aligning Silver-plated chain links with timing mark(s) on camshaft sprocket(s) and bottom tooth (or teeth) of crankshaft sprocket. See Fig. 5 or Fig. 6 . 4. Install fixed chain guide. Slack part of chain should be on tensioner side of cylinder block. Chain should be tight against fixed chain guide. Install pivoting chain guide. Retract tensioner plunger, and pin ratchet

1995 Nissan-Datsun 200SX Timing Chain/ Front Cover Revised Procedure

Removal 1. Set # 1 piston at TDC on its compression stroke. 2. Remove the spark plug wires. 3. Remove the rocker cover (see Figure 1). 4. Remove the coolant reservoir tank with bracket and reposition it for clearance. 5. Support the engine with a suitable jack. 6. Remove cylinder head front mounting bracket. 7. Remove engine front mounting, then the engine front mounting bracket. 8. Remove cylinder head front cover 9. Remove the upper chain tensioner (see Figure 2). 10. Wipe off the links of the upper timing chain next to the timing marks on the sprockets. Put paint marks on the timing chain, matching them with the timing marks on the cam sprockets and idler sprocket (see Figure 3) 11. Remove the four (4) front cover to cylinder head bolts. 12. Remove side and lower engine compartment splash covers. 13. Remove the accessory drive belts. 14. Remove the crankshaft pulley. 15. Drain coolant by removing the cylinder block drain plug and opening the radiator drain cock (Refer to MA section of the Service Manual). 16. Drain engine oil. 17. Remove intake manifold support of engine front side. 18. Remove power steering pump, pump bracket and tension rod. Position pump aside for clearance. 19. Remove the thermostat housing (See Figure 4) 20. Remove the lower chain tensioner (see Figure 5). 21. Remove the front exhaust tube. Refer to the “FE” section (Exhaust System) of the Service Manual. 22. Remove the front and rear engine gussets (if equipped) on either side of the oil pan. NOTE: On A/T models, remove the rear plate cover. 23. Remove the oil pan (see Figure 6). a. Insert the Tool between the cylinder block and oil pan. CAUTION: Be careful not to damage the aluminum mating face. Do not insert a screwdriver, or the oil pan flange will become damaged. b. Slide the Tool by tapping it on the side of the Tool with a hammer. 24. Remove the A/C compressor and position it aside for clearance. 25. Remove the A/C and alternator bracket with the alternator. 26. Remove the oil pump drive spacer. CAUTION: Be careful not to scratch the drive spacer when removing it. 27. Remove the front cover bolts and front cover. CAUTION: One bolt is located on the water pump (see Figure 7). *1: Located on engine front mounting bracket. *2: Located on the water pump. *3: Located on the power steering oil pump adjusting bar. CAUTION: Be careful not to tear or damage the cylinder head gasket. 28. Remove the cylinder block to front cover alignment dowels. CAUTION: Do not hit the dowels or the cylinder block will crack. 29. Wipe off the links of the lower timing chain next to the timing marks on the sprockets. Put paint marks on the timing chain, matching them with the timing marks on the idler sprocket and crankshaft sprocket (see Figure 8). Installation 1. Install the crankshaft sprocket, making sure the mating marks face the front of the engine. 2. Install the idler sprocket and lower timing chain using the mating marks and the paint marks made during the removal process. CAUTION:

2003 Kia Optima L4-2.4L Timing Belt Service and Repair Manual

3.Turn the crankshaft clockwise and align the timing marks so as to bring the No.1 cylinder to compression top-dead-center position. At this time the timing marks of the camshaft sprocket and the upper surface of the rocker cover should coincide, and the dowel pin of the camshaft sprocket should be at the upper side. Remove the auto tensioner. CAUTION: Rotate the crankshaft clockwise. 4.Remove the timing belt. NOTE: If the timing belt is reused, make an arrow mark indicating the turning direction (or the front of the engine) to make sure that the belt is reinstalled in the same direction as before 6.When the oil pump sprocket nut is removed, first remove the plug at left side of the cylinder block and insert a screwdriver to check the left counter balance shaft in position. Screwdriver used for this purpose should have a shaft 8 mm (0.3 inch) in diameter which can be inserted more than 60 mm (2.36 inch) 7.Remove the oil pump sprocket retaining nut and remove the oil pump sprocket. 8.Loosen the right counter balance shaft sprocket mounting bolt until it can be loosened by hand. 9.Next, remove tensioner “B” and remove timing belt “B”. CAUTION: After timing belt “B” has been removed, do not attempt to loosen bolt while holding sprocket with pliers, etc. 10.Remove the crankshaft sprocket “B” from crankshaft. INSPECTION Sprockets, Tensioner Pulley, and Idler Pulley 1.Check the camshaft sprocket, crankshaft sprocket, tensioner pulley, and idler pulley for abnormal wear, cracks, or damage. Replace as necessary. 2.Inspect the tensioner pulley and the idler pulley for easy and smooth pulley rotation and check for play or noise. Replace as necessary. 3.Replace if there is grease leak


TIMING BELT REMOVAL 1. DRAIN ENGINE COOLANT 2. REMOVE ENGINE UNDER COVER 3. REMOVE AIR CLEANER DUCT 4. REMOVE DRIVE BELT, FAN WITH FLUID COUPLING AND WATER PUMP PULLEY (See step 5 in water pump removal in Cooling System) 5. REMOVE RADIATOR ASSEMBLY (See steps 5 and 6 in radiator removal in Cooling System) 6. REMOVE NO.3 TIMING BELT COVER (a) Remove the oil filler cap. (b) Using a 5 mm hexagon wrench, remove the 6 bolts and belt cover. 7. REMOVE NO.2 TIMING BELT COVER Using a 5 mm hexagon wrench, remove the 3 bolts, belt cover and gasket. If you are unable to loosen the bolt on the right because the PS pump pulley interferes with the hexagon wrench, first remove the pulley as follows. (a) Using SST to hold the pulley, remove the nut. SST 09960-10010 (b) Remove the pulley. 8. REMOVE DRIVE BELT TENSIONER Remove the 3 bolts and tensioner. – ENGINE ENGINE MECHANICAL EG-19 9. SET NO.1 CYLINDER TO TDC/COMPRESSION (a) Turn the crankshaft pulley, and align its groove with timing mark “0″ of the No.1 timing belt cover. NOTICE: Always turn the crankshaft clockwise. (b) Check that the timing marks of the camshaft timing pulleys are aligned with the timing marks of the No.4 timing belt cover. If not, turn the crankshaft 1 revolution (360?). 10. REMOVE TIMING BELT FROM CAMSHAFT TIMING PULLEYS HINT (Re-using timing belt): Place matchmarks on the timing belt and camshaft timing pulleys as shown in the illustration. (a) Alternately loosen the 2 bolts, and remove them, the tensioner and dust boot. (b) Disconnect the timing belt from the camshaft timing pulleys. 11. REMOVE CAMSHAFT TIMING PULLEYS Using SST, remove the bolt for the timing pulley. Remove both timing pulleys. SST 09960-10010 (09962-01000, 09963-01000) 12. REMOVE CRANKSHAFT PULLEY (a) Using SST, loosen the pulley bolt. SST 09213-70010, 09330-00021 (b) Remove the SST and pulley bolt


Removal 1. Remove upper radiator crossmember. Disconnect fan assembly connector. Remove fan assembly. Remove drive belts. Using Crankshaft Pulley Holder (8191), hold crankshaft pulley and remove center bolt. Using a 3-jaw puller, remove crankshaft pulley. 2. Remove upper intake manifold. See INTAKE MANIFOLD . Remove electrical and vacuum harness retaining clips from valve cover studs. Remove ignition coils. Remove valve covers. Remove power steering pump and set aside. Remove drive belt tensioner pulley and bracket. Remove timing chain cover. 3. Align crankshaft sprocket timing mark to mark on oil pump housing. Mark on oil pump housing is 60 degrees ATDC of number one cylinder. See Fig. 10