1975 Datsun 280z FSM - Spooled up Racing

Engine Mechanical
TROUBLE DfAGNOSES AND CORRECTIONS
Condition
I. Noisy engine
Knocking of crankshaft
and bearing.
Piston and connecting
rod knocking.
Camshaft knocking.
Timing chain noise.
Camshaft and valve
mechanism knocking.
Water pump knocking.
Loose main bearing.
Seized bearing.
Bent crankshaft.
Probable cause
Uneven wear of journal.
Excessive crankshaft end play.
Loose bearing.
Seized bearing.
Loose piston pin.
Loose piston in cylinder.
Broken piston ring.
Improper connecting rod alignment.
Loose bearing.
Excessive axial play.
Rough gear teeth.
Broken cam gear.
Improper chain tension.
Worn and/or damaged chain.
Worn sprocket.
Worn and/or broken tension adjusting
mechanism.
Excessive camshaft and bearing clearance.
Improper valve clearance.
Worn adjusting screw.
Worn rocker face.
Loose valve stem in guide.
Weakened valve spring.
Seized valve.
Improper shaft end play.
Broken impeller.
Corrective action
Replace.
Replace.
Repair or replace.
Correct.
Replace center bearing.
Replace.
Replace.
Replace pin or bushing.
Recondition cylinder.
Replace.
Realign.
Replace.
Replace bearing thrust plate.
Repair.
Replace.
Adjust.
Replace.
Replace.
Replace.
Replace.
Adjust.
Replace.
Replace.
Replace guide.
Replace.
Repair or replace.
Replace.
Replace.
II. Othermechanical troul »les
Stuck valve.
Improper valve clearance.
Insufficient clearance between valve stem
and guide.
Weakned or broken valve spring.
Seized or damage of valve stem.
Poor quality fuel.
Adjust.
Clean stem or ream guide.
Replace.
Replace or clean.
Use good fuel.
EM-33