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Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
  • Difficult starting
  • Damaged ignition system.
  • Refer to the ENGINE IGNITION for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Damaged fuel system.
  • Damaged starting system.
  • Refer to the STARTERS for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Damaged charging system/battery.
  • Burnt valve.
  • INSTALL a new valve.
  • Worn piston
  • INSTALL a new piston and connecting rod assembly.
  • Worn piston rings.
  • INSTALL a new short block.
  • Worn cylinder
  • INSTALL a new short block.
  • Damaged head gasket
  • INSTALL a new head gasket.
  • Damaged cooling system.
  • Refer to the ENGINE COOLING for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Poor idling
  • Vacuum leak.
  • Malfunctioning or damaged ignition system.
  • Refer to the ENGINE IGNITION for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Malfunctioning or damaged fuel system.
  • Damaged hydraulic lash adjuster.
  • INSTALL a new hydraulic lash adjuster.
  • Incorrect valve-to-valve seat contact.
  • REPAIR or INSTALL a new valve or valve seat.
  • Damaged head gasket.
  • INSTALL a new head gasket.
  • Worn or damaged engine support bracket.
  • INSTALL new engine support brackets.
  • Worn or damaged engine support insulators.
  • INSTALL a new engine support insulator.
  • Worn or damaged transmission insulator and retainer.
  • INSTALL a new transmission insulator and retainer.
  • Abnormal combustion
  • Malfunctioning or damaged fuel system.
  • Malfunctioning or damaged ignition system.
  • Refer to the ENGINE IGNITION for the procedure.
  • REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Malfunctioning or damaged air intake system.
  • Damaged valve tappet or lash adjuster.
  • INSTALL a new valve tappet or lash adjuster.
  • Damaged valve tappet guide or valve tappet.
  • INSTALL a new valve tappet guide or valve tappet.
  • Burnt or sticking valve.
  • REPAIR or INSTALL a new valve.
  • Weak or broken valve spring.
  • INSTALL a new valve spring.
  • Carbon accumulation in combustion chamber.
  • ELIMINATE carbon buildup.
  • Excessive oil consumption
  • Leaking oil.
  • REPAIR oil leakage.
  • Malfunctioning PCV system.
  • REPAIR or INSTALL new necessary components.
  • Worn valve stem seal.
  • INSTALL a new valve stem seal.
  • Worn valve stem or valve guide.
  • INSTALL a new valve stem or valve guide.
  • Sticking piston rings.
  • INSTALL a new piston rings.
  • Worn piston ring groove.
  • INSTALL a new piston and connecting rod assembly.
  • Worn piston or cylinder.
  • INSTALL a new short block.
  • Engine noise
  • Leaking exhaust system.
  • REPAIR exhaust leakage.
  • Incorrect drive belt tension.
  • Malfunctioning generator bearing.
  • Malfunctioning water pump bearing.
  • Malfunctioning or damaged cooling system.
  • Malfunctioning or damaged fuel system.
  • Loose timing chain/belt.
  • ADJUST or INSTALL a new timing chain/belt.
  • Damaged timing chain tensioner.
  • INSTALL a new timing chain tensioner.
  • Excessive main bearing clearance.
  • INSTALL a new short block.
  • Seized or heat damaged crankshaft main bearing.
  • INSTALL a new short block.
  • Excessive crankshaft end play.
  • INSTALL a new crankshaft thrust bearing or crankshaft.
  • Excessive connecting rod bearing clearance.
  • INSTALL a new short block.
  • Heat damaged connecting rod bearing.
  • INSTALL a new short block.
  • Damaged connecting rod bushing.
  • INSTALL a new short block.
  • Worn cylinder.
  • INSTALL a new short block.
  • Worn piston or piston pin.
  • INSTALL a new short block.
  • Damaged piston rings.
  • INSTALL a new short block.
  • Bent connecting rod.
  • INSTALL a new short block.
  • Malfunctioning hydraulic lash adjuster.
  • INSTALL a new hydraulic lash adjuster.
  • Broken valve spring.
  • INSTALL a new valve spring.
  • Excessive valve guide clearance.
  • ADJUST clearance or INSTALL a new valve guide.
  • Insufficient power
  • Malfunctioning or damaged ignition system.
  • Refer to the ENGINE IGNITION for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Malfunctioning or damaged fuel system.
  • Malfunctioning or damaged air intake system.
  • Refer to the for the procedure. REFER to the INTRODUCTION article in ENGINE PERFORMANCE .
  • Damaged or plugged exhaust system.
  • INSPECT exhaust system.
  • Incorrect tire size.
  • Dragging brakes.
  • Slipping transmission.
  • Malfunctioning hydraulic lash adjuster.
  • INSTALL a new hydraulic lash adjuster.
  • Compression leakage at valve seat.
  • INSTALL a new cylinder head.
  • Seized valve stem.
  • INSTALL a new cylinder head.
  • Weak or broken valve spring.
  • INSTALL a new valve spring.
  • Worn or damaged cam.
  • INSTALL a new cylinder head.
  • Damaged head gasket.
  • INSTALL a new head gasket.
  • Cracked or distorted cylinder head.
  • INSTALL a new cylinder head.
  • Damaged, worn or sticking piston ring (s).
  • INSTALL a new short block.
  • Worn or damaged piston.
  • INSTALL a new short block.
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