TIMING BELT - Inspection
EM-11spec tableInspection
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 — illustrations showing broken tooth and cracked tooth root | Camshaft jamming; Distributor jamming; Damaged camshaft/crankshaft oil seal |
| Back surface is cracked/worn. | See figure SEM395A — illustration showing cracked/worn back surface | Tensioner jamming; Overheated engine; Interference with belt cover |
| Side surface is worn. | See figure SEM396A — illustrations showing worn side surface. 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 — illustrations showing worn teeth with rotating direction indicated. 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. | See figure — illustration showing contaminated belt surface | 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 — illustrations showing broken tooth and cracked tooth root
CauseCamshaft jamming; Distributor jamming; Damaged camshaft/crankshaft oil seal
Back surface is cracked/worn.
ProblemSee figure SEM395A — illustration showing cracked/worn back surface
CauseTensioner jamming; Overheated engine; Interference with belt cover
Side surface is worn.
ProblemSee figure SEM396A — illustrations showing worn side surface. 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 — illustrations showing worn teeth with rotating direction indicated. 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.
ProblemSee figure — illustration showing contaminated belt surface
CausePoor oil sealing of each oil seal; Coolant leakage at water pump; Poor belt cover sealing