Chirping/whistle from belt area (1KR)
- Symptoms
- Chatter/whistle at certain rpm, faint whine with A/C
- Likely cause
- A/C compressor shaft bearing play, worn belt, water pump
- Fix
- Replace belt (and tension), water pump, compressor bearing
- Applies to
- KGC10/KGC15/QNC10; Boon M300S/M301S/M310S (same platform)
- Related fault codes
- none
- Related part numbers
- 90048-31047, 16100-80001
- Confidence
- unverified (single forum thread)
Sources
Related problems on this car
- No power to fuel pump (KGC10 1KR)
- 1KR oil consumption
- Timing chain rattle on cold start (1KR/K3)
- Blocked catalytic converter
Similar problems on other cars
- Drive belt squeal / tensioner failure · Toyota Corolla (9th gen, E120)
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