Section 03
TROUBLESHOOTING
Subsection 01
(TROUBLESHOOTING CHART)
03-01-10
SMR2002-058_03-01A.FM
UNUSUAL ENGINE NOISE AND/OR VIBRATION (GTX 4-TEC)
ABNORMAL NOISE FROM PROPULSION SYSTEM
NOTE:
Prior to replacing a EMS ECU or MPEM, refer to the appropriate EMS ECU/MPEM section or EMS
ECU/MPEM
REPLACEMENT in the ENGINE MANAGEMENT section and read carefully the tests to do
before replacing a EMS ECU/MPEM that could otherwise be good.
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• Worn chain tensioner
• Replace
• Worn chain guide
• Replace
• Stretched chain and/or worn out
sprockets
• Replace chain and sprockets
• Sprocket screws got loose
• Retorque
• Hydraulic element inside rocker
arm(s) is(are) worn out (valve adjust-
ment)
• Replace faulty rocker arm(s)
• Rocker arm screws not tightened
• Retorque
• Heavy wear on crankshaft and/or bal-
ancer shaft bearings
• Replace
• Crankshaft and balancer shaft not
aligned
• Check marks and readjust shafts
• Heavy wear on thrust washers, or
thrust washers missing
• Check/replace
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• Weeds/debris caught in intake grate
or impeller
• Check/clean
• Low oil level in jet pump (
DI models
)
• Check/troubleshoot source of leak/
refill supply, refer to section
PROPULSION SYSTEM
• Worn anti-rattle system (
DI models
)
• Check/replace pusher in cover, refer to
section PROPULSION SYSTEM
• Damaged or bent drive shaft
• Check/replace, refer to section
PROPULSION SYSTEM
• Idle speed too low
• Check fault codes
• Broken engine mounts
• Check/replace, refer to section ENGINE
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Summary of Contents for GTX 4-TEC 5573 2002
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