DPF & Diesel
Turbo Replacement
Turbo failure often has an underlying cause. Oil supply, restriction and boost control are checked first — otherwise the new turbo goes the same way as the old one.
Lost boost or smoking?
Symptoms of turbo problems
- Loss of power or limp mode under load
- Whistling, siren or grinding noise from the turbo
- Blue or grey smoke from the exhaust
- Rising oil consumption
- Overboost or underboost fault codes
- Sticking variable geometry actuator
Diagnosis before replacement
- Boost pressure logging against target values
- Checking for intake and intercooler leaks
- Inspecting oil feed and return for restriction or contamination
- Assessing shaft play and turbine condition
- Testing actuator and vane operation
- Checking DPF and exhaust restriction, which can mimic turbo failure
What replacement involves
- Removal of the turbocharger and associated pipework
- Cleaning or replacing oil feed and return lines
- Checking the sump and oil condition for debris
- Fitting the new or reconditioned unit with new gaskets and studs where needed
- Priming, leak checking and road testing with boost data monitored
Frequently asked questions
Diesel running badly?
Our work
Recent jobs from our workshop
Photographs taken during work carried out at our Iver workshop.
Damaged turbo compressor wheel found on inspection
Symptoms
Symptoms that often lead to this repair
Look up what your car is doing and read what it commonly means.
Car stuck in limp modeLimp mode is a protection strategy, not a fault in itself. The control unit has seen a reading it does not trust and has reduced power to keep things safe.Read more Whining noise when acceleratingThe useful question is whether the whine follows engine revs or road speed, because that separates belt and turbo noises from gearbox and differential noises.Read more Blue smoke from the exhaustBlue smoke points at oil reaching the combustion chamber or exhaust. When it appears — start-up, overrun or under boost — narrows the cause.Read more Car losing power when acceleratingLoss of power is either a fuelling, air or protection issue. Live data under load is what separates them rather than guesswork.Read more Oil leak under the carOil spreads and drips away from its source, so leaks are traced by cleaning, running and inspecting rather than by looking once.Read more Turbo failure symptomsTurbos rarely fail without a reason. Oil supply, oil condition and blocked exhaust flow are common contributors, and replacing the turbo alone can repeat the failure.Read more
Related
You may also need
Diesel DiagnosticsModern diesels combine high-pressure fuelling, turbocharging, exhaust gas recirculation and after-treatment. When one part of that system drifts, the symptoms usually show up somewhere else.Read more DPF DiagnosticsA DPF warning is the end of a chain of events, not the start. Finding out why the filter is loading up is the part that saves money.Read more EGR Valve Repair & ReplacementThe EGR system recirculates a measured amount of exhaust gas back into the engine. When it sticks, everything downstream suffers — including the DPF.Read more Engine Repairs in IverEngine faults are where guesswork gets expensive. We test, measure and read live data before anything is replaced.Read more Oil & Filter ServiceClean oil of the right specification is what keeps bearings, turbochargers and wet timing belts alive. It is the single most valuable job on the schedule.Read more
Talk to us about turbo replacement
Based in Iver, covering West London, Berkshire and South Buckinghamshire. Send your registration and we will quote for your vehicle.