Powerhead
90-8M0065421 NOVEMBER 2012 Page 4A-1
4
A
Powerhead
Section 4A - Powerhead
Table of Contents
Camshaft and Valve Specifications................................... 4A-2
Cooling System Specifications...........................................4A-2
Piston Specifications..........................................................4A-3
Cylinder Block Specifications.............................................4A-4
Camshaft and Valve Components..................................... 4A-6
Crankshaft, Piston, and Connecting Rod Components..... 4A-8
Oil Pan Components........................................................4A-10
Cylinder Block Components.............................................4A-12
Thermostat.......................................................................4A-14
Removal....................................................................4A-14
Inspection................................................................. 4A-15
Installation.................................................................4A-16
Valve Clearance Adjustment............................................4A-18
Powerhead Removal........................................................4A-19
Powerhead Disassembly................................................. 4A-20
Oil Pan Removal.......................................................4A-20
Cylinder Block Disassembly..................................... 4A-21
Crankshaft/Piston Disassembly................................ 4A-22
Valve Lifter/Rocker Arm Disassembly...................... 4A-23
Cleaning/Inspection/Repair..............................................4A-24
Flywheel....................................................................4A-24
Cylinder Bore Measurement..................................... 4A-25
Piston........................................................................4A-25
Piston Pin..................................................................4A-26
Piston Rings..............................................................4A-27
Connecting Rod........................................................ 4A-28
Crankshaft................................................................ 4A-28
Inspecting the Camshaft and Valves............................... 4A-30
Camshaft.................................................................. 4A-30
Valves....................................................................... 4A-30
Lifters and Push Rods.............................................. 4A-31
Valve Springs............................................................4A-31
Valve Guides............................................................ 4A-32
Valve Seat Reconditioning........................................4A-32
Piston/Crankshaft Reassembly........................................4A-34
Piston Assembly....................................................... 4A-34
Piston Ring Installation............................................. 4A-34
Piston/Crankshaft Installation................................... 4A-35
Powerhead Assembly...................................................... 4A-36
Valve Train Assembly............................................... 4A-36
Cylinder Block Assembly.......................................... 4A-38
Driveshaft Seal Replacement................................... 4A-39
Oil Pan Installation....................................................4A-40
Powerhead Installation.....................................................4A-42
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