1975 Datsun 280z FSM - Spooled up Racing

Engine Mechanical
Condition
Seized valve seat.
Excessively worn
cylinder and piston.
Faulty connecting
rod.
Faulty crankshaft
bearing.
Probable cause
Improper valve clearnce.
Weakned valve spring.
Thin valve head edge.
Narrow valve seat.
Overheating.
Over speeding.
Stuck valve guide.
Shortage of engine oil.
Dirty engine oil.
Poor quality of oil.
Overheating
Wrong assembly of piston with connecting
rod.
Improper piston ring clearance.
Broken piston ring.
Dirty air cleaner.
Mixture too rich.
Engine over run.
Stuck choke valve.
Over choking.
Shortage of engine oil.
Low oil pressure.
Poor quality engine oil.
Rough surface of crankshaft.
Clogged oil passage.
Bearing worn or eccentric.
Bearing improperly assembled.
Loose bearing.
Incorrect connecting rod alignment.
Shortage of engine oil.
Low oil pressure.
Poor quality engine oil.
Crankshaft journal worn or out-of-round.
Clogged oil passage in crankshaft.
Bearing worn or eccentric.
Bearing improperly assembled.
Eccentric crankshaft or bearing.
Adjust.
Replace.
Replace valve.
Reface.
Repair or replace.
Corrective action
Drive at proper speed.
Repair.
Add or replace oil.
Clean crankcase, replace oil and oil filter
element.
Use proper oil.
Repair or replace.
Repair or replace.
Adjust.
Replace.
Clean.
Adjust.
Drive at proper speeds.
Clean and adjust.
Start correct way.
Add oil.
Correct.
Use proper oil.
Grind and replace bearing.
Clean.
Replace.
Correct.
Replace.
Repair or replace.
Add or replace.
Correct.
Use specified oil.
Repair.
Clean.
Replace.
Correct.
Replace.
EM-34