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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (M/T Clutch) >> Clutch System >> Problem Symptoms Table

Problem Symptoms Table

WARNING: This page is about a different variant/trim than selected.

Use the table below to help you find the cause of the problem. The numbers indicate the ranked order of probability of each of the possible causes. Check each part in order. Replace parts as necessary.

CLUTCH SYSTEM 

CLUTCH SYSTEM SYMPTOM REFERENCE

Symptom Suspected Area See
Clutch grabs / chatters Engine mounting (loose) -
Clutch disc assembly (runout is excessive) CLUTCH UNIT 
Clutch disc assembly (oily) CLUTCH UNIT 
Clutch disc assembly (worn out) CLUTCH UNIT 
Clutch disc (glazed) CLUTCH UNIT 
Diaphragm spring (tip is out of alignment) -
Clutch pedal is spongy Clutch line (air in line) BLEEDING 
Master cylinder cup (damaged) -
Release cylinder rubber (damaged) DISASSEMBLY 
Clutch is noisy Release bearing (worn, dirty, or damaged) CLUTCH UNIT 
Clutch slips Clutch pedal (free play is out of adjustment) ON-VEHICLE INSPECTION 
Clutch disc (oily) CLUTCH UNIT 
Clutch disc (worn out) CLUTCH UNIT 
Diaphragm spring (damaged) -
Flywheel (distorted) CLUTCH UNIT 
Clutch does not disengage Clutch pedal (free play is out of adjustment) CLUTCH PEDAL 
Clutch line (air in line) BLEEDING 
Master cylinder (damaged) REMOVAL 
Master cylinder cup (damaged) -
Release cylinder cup (damaged) CLUTCH RELEASE CYLINDER 
Clutch disc assembly (out of true) CLUTCH PEDAL SWITCH 
Clutch disc assembly (runout is excessive) CLUTCH UNIT 
Clutch disc assembly (lining is broken) CLUTCH UNIT 
Clutch disc assembly (dirty or burned) CLUTCH UNIT 
Clutch disc assembly (oily) CLUTCH UNIT 
Clutch disc assembly (lack of spline grease) CLUTCH PEDAL SWITCH