Engine

components Component Test in this section. INSTALL

new parts as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Worn valve guides CARRY OUT the Valve Guide Inner

Diameter procedure. REFER to: Valve Guide Inner Diameter (303-00 Engine System - General Information, General Procedures).

Excessive runout of the INSPECT for abnormalities on the valve valve seats or the valve face and valve seat. INSTALL a new face cylinder head assembly if abnormalities

are found.

Engine noise, upper end - Gasoline octane too VERIFY with customer the type of pinging noise low gasoline used. CORRECT as necessary.

TEST the system for normal operation after the repair.

KS operation CHECK the KS operation. INSTALL a

new KS. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Incorrect spark timing CHECK the spark timing. REPAIR as

necessary. TEST the system for normal operation after the repair.

High operating INSPECT the cooling system for leaks. temperature CHECK the coolant level. REFILL as

necessary. CHECK the coolant for the correct mix ratio. DRAIN and REFILL as needed. VERIFY the engine operating temperature is within specifications. REPAIR as necessary. TEST the system for normal operation after the repair.

Spark plug CHECK the spark plugs. REPAIR or

INSTALL new spark plugs as necessary. TEST the system for normal operation after the repair.

Catalytic converter Compare with a similar vehicle for what is

acceptable noise.

Engine noise, lower end - Oil pump USE the EngineEAR to verify the oil pump ticking or knocking noise as the source of the noise at low rpm. near the oil filter adapter REPAIR as necessary. Refer to the

appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Engine noise, lower end - Excessive clearance CARRY OUT the Piston Diameter light knocking noise, also between the piston and procedure. described as piston slap. the cylinder wall REFER to: Piston Diameter (303-00 Noise is most noticeable Engine System - General Information, when the engine is cold General Procedures). with light to medium Measure the cylinder bore diameter. acceleration. The noise Subtract the piston diameter from the disappears as the engine cylinder bore diameter to find the piston- warms to-cylinder bore clearance. REFER to the

appropriate 303-01 Section for specifications.