Tahoe 4WD V8-393 6.5L DSL Turbo VIN S (1995)
Camshaft: Service and Repair
When the timing chain, gears, front cover, CKP sensor, engine or other components affecting timing are to be replaced, it will be necessary to
reprogram the TDC Offset into the PCM.
1. Disconnect negative battery cables, then drain cooling system.
2. Remove radiator, shrouds and fan.
3. Remove A/C condenser mounting bolts and A/C condenser unit, if equipped.
4. Remove grille and parking lamp assembly, then the hood latch and brace assembly.
5. Remove oil pump drive.
6. Remove power steering pump, alternator, air conditioning compressor and position aside.
7. Remove rocker arm covers.
8. Remove rocker arm assemblies and pushrods. Rocker arm assemblies and pushrods must be marked for proper assembly.
9. Remove hydraulic lifters. Place lifters in a rack. The lifters must be installed in the same bore from which they were removed.
10. Remove front cover as described previously.
11. Remove timing chain and camshaft sprocket.
12. On models equipped with lift type fuel pump, remove fuel pump.
13. Remove front engine mount through bolts.
14. Raise and support engine. When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal or
crankshaft pulley. Due to the small clearance between the oil pan and oil pump screen, jacking against the oil pan may cause it to be bent
against the pump screen, resulting in a damaged oil pickup unit.
15. Remove bolts and thrust bearing.
16. Remove camshaft. Pull camshaft from engine block carefully to avoid damage to camshaft bearings.
17. Remove spacer, if necessary.
18. Reverse procedure to install, noting the following:
a. If a new camshaft is installed, the hydraulic lifters, engine oil and oil filter should be replaced.
b. Install spacer with I.D. chamfer facing towards the camshaft.
c. Coat camshaft lobes with lube part No. 0.052365, or equivalent.
d. When installing timing chain and sprockets, properly align timing marks.
e. Tighten bolts to specifications.
