Camshaft Timing Belt — CD20 (Cont'd) — Inspection

EM-208spec table

Applies to CD20 engine.

Continued from EM-207

TIMING BELT

Camshaft Timing Belt — CD20 (Cont'd)

INSPECTION

Timing belt

Visually check the condition of timing belt. Replace if any abnormality is found.

Timing belt inspection

Item to check	Problem	Cause
Tooth is broken/tooth root is cracked.	See figure SEM394A	Camshaft jamming; Distributor jamming; Damaged camshaft/crankshaft oil seal
Back surface is cracked/worn.	See figure SEM395A	Tensioner jamming; Overheated engine; Interference with belt cover
Side surface is worn.	See figure SEM396A. Belt corners are worn and round. Wicks are frayed and coming out.	Improper installation of belt; Malfunctioning crankshaft pulley plate/timing belt plate
Teeth are worn.	See figure SEM397A. Canvas on tooth face is worn down. Canvas on tooth is fluffy, rubber layer is worn down and faded white, or weft is worn down and invisible.	Poor belt cover sealing; Coolant leakage at water pump; Camshaft not functioning properly; Distributor not functioning properly; Excessive belt tension
Oil, coolant or water is stuck to belt.		Poor oil sealing of each oil seal; Coolant leakage at water pump; Poor belt cover sealing

Tooth is broken/tooth root is cracked.

ProblemSee figure SEM394A

CauseCamshaft jamming; Distributor jamming; Damaged camshaft/crankshaft oil seal

Back surface is cracked/worn.

ProblemSee figure SEM395A

CauseTensioner jamming; Overheated engine; Interference with belt cover

Side surface is worn.

ProblemSee figure SEM396A. Belt corners are worn and round. Wicks are frayed and coming out.

CauseImproper installation of belt; Malfunctioning crankshaft pulley plate/timing belt plate

Teeth are worn.

ProblemSee figure SEM397A. Canvas on tooth face is worn down. Canvas on tooth is fluffy, rubber layer is worn down and faded white, or weft is worn down and invisible.

CausePoor belt cover sealing; Coolant leakage at water pump; Camshaft not functioning properly; Distributor not functioning properly; Excessive belt tension

Oil, coolant or water is stuck to belt.

Problem

CausePoor oil sealing of each oil seal; Coolant leakage at water pump; Poor belt cover sealing

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