Always establish the cause of failure before fitting a replacement unit.
- Oil starvation/delay
- Oil contamination
- Impact damage
- Blocked engine breather
- Over speeding of shaft and wheel
- Hot shut down of engine
Some points to note before refitting the turbocharger
- Remove oil feed pipes and all associated banjo bolts etc. Inspect for damage/blockage before refitting. Check there is a good clean oil feed to the turbo and that the flow/pressure is correct (it is recommended that new oil feed pipes should be fitted). The turbocharger should be primed before running the engine for the first time after fitting.
- Check all induction piping/air filter box and air filter are free from debris. Check that any debris (Including the shaft nut) from the previous failure is not present.
- Check engine breather and associated valves are working correctly and are free from debris.
- Check oil drain pipe to sump is not blocked, restricted or damaged.
- Do not use any type of sealer on any of the oil inlet and outlet connections to the turbocharger, also turbine inlet and outlet flanges.
- Change oil and oil filter with correct type and grade of oil (refer to manufacturers specifications). It is also advisable to let the engine idle for 45 seconds before switching the engine off if it is driven hard to prevent bearing damage.
- Inspect EGR valve for correct operation and the DPF filter (If fitted) is not blocked.
- Check ECU to manufacturer’s specifications and all associated boost control valves/pipes for correct operation.
- Do not fit a replacement turbo to a worn engine.