TROUBLESHOOTING ON ENGINE TEST STAND CONTINUED
TEST OR INSPECTION
21. MECHANICAL KNOCKS.
Check vibration damper and flywheel for looseness and damage.
Tighten loose bolts.
Replace damaged vibration damper or flywheel.
Check push tubes and cam followers for damage.
Replace damaged push tubes (page 2-33) and cam follower
Check for broken piston rings.
Replace broken piston rings (page 2-220).
Check for scored pistons and cylinder sleeves.
Replace scored pistons (page 2-220) or cylinder sleeves
Check for correct main and connecting rod bearing clearance.
Replace bearings with proper size. Repair crankshaft (page 2-214
Check for excessive crankshaft end play.
Replace thrust bearing with oversize, repair crankshaft (page 2-214).
OIL TEMPERATURE TOO HIGH.
Check crankcase oil level.
Refill to proper level and drain excess oil.
Check for high engine temperature or defective thermostat.
Replace defective thermostat.
Check all hoses, connections, and gaskets for leaks, allowing air into cooling
Repair or replace leaking hoses, connections, and gaskets.
23. SLUGGISH ENGINE ACCELERATION.
Check filter, gaskets, connections, and suction lines for air leaks.
Replace defective filter, leaking gaskets, connections, and lines.
Check all fuel lines for bends, breaks, or damage causing restriction.
Repair or replaced restricted fuel lines.
Check injector timing (page 2-106).
Reset injector timing.