Timing Chain and Sprockets Replacement Cadillac Escalade GMT800

Tools Required

1. J 8433 Two Jaw Puller
2. J 41816-2 Crankshaft End Protector
3. J 41558 Crankshaft Sprocket Remover
4. J 41665 Crankshaft Balancer and Sprocket Installer

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1. Remove the oil pump. Refer to «OIL PUMP, PUMP SCREEN AND DEFLECTOR REPLACEMENT»(ref-180687-S35894515512005072800000) .
2. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned. NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
3. Remove the camshaft sprocket bolts.
4. Remove the camshaft sprocket and timing chain.
5. Use the J 8433 , the J 41816-2 and the J 41558 in order to remove the crankshaft sprocket.
6. Remove the crankshaft sprocket.
7. Remove the crankshaft sprocket key, if required.
8. If required, clean and inspect the timing chain and sprockets. Refer to «TIMING CHAIN AND SPROCKETS CLEANING AND INSPECTION»(ref-180687-S15765441252005072800000) .

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1. Install the key into the crankshaft keyway, if previously removed.
2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.
3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
4. Use the J 41665 in order to install the crankshaft sprocket. Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position. Important: Properly locate the camshaft sprocket locating pin with the camshaft sprocket alignment hole. The sprocket teeth and timing chain must mesh. The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly. Locate the camshaft sprocket alignment mark in the 6 o'clock position.
6. Install the camshaft sprocket and timing chain.
7. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
8. Install the camshaft sprocket bolts. Tighten Tighten the bolts to 35 N.m (26 lb ft).
9. Install the oil pump. Refer to «OIL PUMP, PUMP SCREEN AND DEFLECTOR REPLACEMENT»(ref-180687-S35894515512005072800000) .

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1. Raise the hood to the service position, perform the following: Remove the hood hinge bolts (1). Raise the hood until vertical. Install the hood hinge bolts until snug in the service position (2).
2. Remove the radiator support. Refer to RADIATOR SUPPORT REPLACEMENT in BODY FRONT END.
3. Remove the front cover. Refer to «Engine Front Cover Replacement»(ref-180687-S11549802452005072800000) .
4. Remove the valve lifters. Refer to «Valve Lifter Replacement»(ref-180687-S19014052202005072800000) .
5. Remove the camshaft sensor bolt and sensor.
6. Rotate the crankshaft until the timing marks on the crankshaft and camshaft sprockets are aligned.
7. Remove the camshaft sprocket bolts. NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
8. Remove the camshaft sprocket and reposition the timing chain.
9. Remove the camshaft retainer bolts and retainer. NOTE: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.
10. Remove the camshaft. 10.1. Install three M8-1.25 x 100 mm (M8-1.25 x 4.0 in) bolts to the bolt holes in the front of the camshaft. 10.2. Using the bolts as a handle, carefully rotate and pull the camshaft out of the engine block. 10.3. Remove the three bolts from the camshaft.
11. If required, clean and inspect the camshaft and bearings. Refer to «CAMSHAFT AND BEARINGS CLEANING AND INSPECTION»(ref-180687-S08341272902005072800000) .