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6.8L Gas Engine Table of Contents
QUICK REFERENCE GUIDE ...................................................................................................................................1
6.8L GAS ENGINE ...................................................................................................................................................2
CYLINDER BLOCK ..................................................................................................................................................4
CYLINDER HEAD .....................................................................................................................................................6
TIMING COVER ........................................................................................................................................................8
PISTON, ROD AND CRANK ..................................................................................................................................10
TIMING GEARS ......................................................................................................................................................12
CAMSHAFT ............................................................................................................................................................14
BALANCE SHAFT ..................................................................................................................................................15
ROCKER COVER ...................................................................................................................................................16
OIL PUMP ...............................................................................................................................................................17
OIL PAN ..................................................................................................................................................................18
CRANKCASE VENTILATION .................................................................................................................................19
OIL FILTER .............................................................................................................................................................20
WATER PUMP ........................................................................................................................................................22
THERMOSTAT ........................................................................................................................................................23
DAMPER/PULLEY ..................................................................................................................................................24
INTAKE MANIFOLD ................................................................................................................................................25
IGNITION SYSTEM ................................................................................................................................................26
Legend
“A/R” AS REQUIRED
“STD” STANDARD SIZE
“O.S.” OVERSIZE
“U.S.” UNDERSIZE
“NA” NOT AVAILABLE
NOTE
The information in this manual is known to be accurate as of the date of release shown on the
cover. However, engineering changes can occur without notice. To obtain the proper parts,
please be sure to use the serial number of the unit being serviced when ordering from this
manual.
All other parts not shown in this manual can be found in the Owner's Manual for the
unit being serviced. Owner's Manuals can be found at:
www.generac.com