Closed Turbo Diesel Noise Diagnosis - Mitsubishi ASX 4N14
posted on Wednesday 5 August 2026
expired on Sunday 23 August 2026
BL9 9EZ, Bury, Greater Manchester
Mitsubishi ASX 4 DI-D 4X4 Auto (2014, 4N14 2.2 diesel engine, 100,700 miles) - squeaking noise under hard/flat-foot acceleration only. No noise during gradual acceleration or steady cruising. No dashboard warning lights. Started suddenly a few days ago, not a gradual onset. Auxiliary/serpentine belt already visually inspected and ruled out (no glazing, cracking, or excessive deflection). Looking for a proper diagnosis under load - suspect turbo (wastegate/actuator), boost/vacuum hose leak (smoke test), or a loose heat shield. Need someone comfortable with turbo diesels who can pinpoint the specific component, not just a general once-over. Have an extended warranty that may cover
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