Boost Leak
A boost leak is a leak in the pressurised intake system after the turbo, letting compressed air escape.
What is Boost Leak?
Common points are hose joints, intercooler and clamps. Oil-soaked hoses can split. A smoke or pressure test finds them. On diesels, oil mist in the charge pipes is common from the crankcase ventilation; heavy oil wetness at a joint shows where a leak is. Testers pressurise the system with the engine off to listen for leaks.
How it works
Escaping air means the engine gets less boost than requested.
Why it matters for your car
Typical signs are lack of power, whistling and underboost codes. Diesels may also smoke more.
Other terms
- Airbag Replacement After Deployment
- Backfire
- Battery Electrolyte (Battery Acid)
- Cabin Temperature Sensor
- Charging Losses
- Clutch Judder
- Diesel Injection Pump (Distributor Or Inline Pump)
- Driving In Fog
- Fuel Injector Cleaning
- GPS Tracker (Vehicle Tracking)
- Headlight Switch
- Horn
- Metric Horsepower (PS, CV, HP)
- Oil Filter Wrench
- Orange Peel (Paint Texture)
- Overrun Brake (Trailer Inertia Brake)
- Stratified Charge Combustion
- Trolley Jack (Floor Jack)
- Twin Carburettors
- Wiper Motor