V 3500 P/U 4WD L6-292 4.8L (1987)
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Thrust plate to camshaft clearance. Use a feeler gage. The proper clearance is 0.003-0.008-inch. If the clearance is excessive, replace the thrust
plate. If the clearance is insufficient, replace the spacer ring. Refer to the proper unit repair manual.
Camshaft Gear And Thrust Plate Replacement
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Refer to the proper unit repair manual.
Camshaft Bearing Replacement
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Refer to the proper repair manual.
Install or Connect
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Coat the camshaft lobes and journals with a high quality engine oil supplement (GM Engine Oil Supplement or equivalent).
1. Camshaft (90) to the engine. Handle the camshaft carefully to prevent damage to the camshaft bearings.
Important
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Line up the timing marks on the crankshaft gear and camshaft gear.
2. Thrust plate bolts (94).
Tighten
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Thrust plate bolts to 9.0 N.m (80 in. lbs.).
Measure
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Camshaft and crankshaft gear run-out. Use ai dial indicator. Camshaft gear run-out should not exceed 0.10 mm (0.004-inch), crankshaft gear
run-out should not exceed 0.08 mm (0.003-inch). If gear run out is excessive, the gear will have to be removed and any burrs cleaned from the
shaft or the gear will have to be replaced.
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Timing gear backlash. Use a dial indicator. The correct backlash is 0.10-0.15 mm (0.004-0.006-inch) with new parts, 0.20 mm (0.008-inch)
maximum with used parts.
4. Timing gear cover, as outlined previously.
5. Torsional damper, as outlined previously.
6. Hydraulic lifters, as outlined previously.
Important
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Replace all hydraulic lifters, change the crankcase oil and filter, and add GM Engine Oil Supplement (or equivalent) to the engine oil if a new
camshaft was installed.
7. Pushrod covers, as outlined previously.
8. Distributor.
9. Rocker arm cover, as outlined previously.
10. Fuel pump.
11. Air cleaner.
12. Radiator, fan, pulley, and shroud.
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Fill the cooling system with the proper quantity and grade of coolant.
13. Front end sheet metal, as required.
