Why They Normally Fail
The Audi A4 1.9TDi and Audi A4 2.0TDi, both being Diesel Particulate Filter (DPF) models commonly suffer problems with the turbo charger unit failing. Other common problems for the Audi A4 1.9 & 2.0 TDi (DPF model) is Diesel Injectors failing & Engine Oil contamination. The reason they fail is most commonly due to the Diesel Particulate Filter (DPF), located in the exhaust it is designed to trap soot / ash particles and by doing so, it restricts the airflow of exhaust gasses which in turn will increase the back-pressure. Excessive and long-term back-pressure will put a lot of strain on mechanical components and with the turbocharger being directly connected to the Diesel Particulate Filter, that is most likely the first unit to show signs of failure.
Also, it may be the way the vehicle has been looked after. If it has not been properly maintained i.e. regular oil changes and allowing the engine time to warm up a little before a quick run. When you start a turbo engine from cold, the oil will be thick and gunky which takes time to travel around all components. For this reason, it is suggested that when starting the vehicle, allow 1-2 minutes before moving from a cold start. This will give time for the oil to warm up and when hot the oil is thinner which allows it to travel around mechanical components much faster. Once the oil is thin, the turbocharger is properly lubricated and spooling the turbo will be much safer. After a long drive where the turbo has been spooled up for long periods of time i.e. motorway runs.. it is advised that before turning the engine off, allowing the engine to stay running for 1-2 minutes while the turbo cools & spools down. Shutting off the engine immediately may result in back-spin which is not good at all and can damage seals, bearings and the fins on the turbines.
On a side note, when the DPF get’s blocked it’s a very expensive repair. However, Sinspeed does offer a very affordable & competitive DPF Removal Service.
Common Symptoms of a Failed Turbocharger
- Play in the impeller shaft
- Oil leaking into the intake
- White smoke
- Noisy Bearing / Whining Noise On Throttle
- Loss Of Power & No Kick-Down
What Do We Do
When your turbocharger unit fails, garages & dealerships will advise of having it replaced and most commonly a new unit will be the only choice given to you. The reason for this common choice is you are offered a better warranty on a new unit then you are on second-hand parts. You can purchase a second-hand turbocharger from a breakers / parts shop but the maximum warranty offered will be 30-90 days.
What we do, however, is remanufacture your existing unit & where possible, replace it with an exchange turbocharger off the shelf which has been re-manufactured by us ready to send out. If you send your turbocharger to us here at Sinspeed, we’ll strip your turbo unit down and replace all seals & bearings with new & genuine parts which meet & exceed OE specifications. The compressor housing will be machined and fully leak tested to ensure a rebuild of the highest quality before returning the turbocharger unit to you with a full 1 year warranty. In fact, you won’t even recognise the turbocharger as we chemically clean all units before rebuilding them so they look as good as new!
The Audi A4 1.9 & 2.0 TDi (DPF Model) turbo charger failures commonly have damaged fins or snapped turbine shafts. We can still remanufacture these units because we have access to all brand new & genuine parts.
Our Rebuild Procedure
- We first process your turbocharger in our mechanical parts washer
- We then strip the turbocharger right down & examine it for defects
- Your turbocharger will then be chemically cleaned & blasted
- We then leak test the housing and machine if necessary
- We’ll then proceed to rebuild with all new Oil Seals & Bearings (To meet & exceed the OE specifications)
- We then go on to replace any other parts required
- Finally we test, balance & re-calibrate the unit before dispatching it back to you
How Long Will This Process Take
We can normally turn around a turbo rebuild in just 24-48 hours.
Do You Offer A Fitting Service?
Yes, we do. We aim to offer the most competitive rate fitting services and if you find a better deal elsewhere, we always aim to beat it. We also offer a free collect & return service on your vehicle (dependant of your location) so if you’re having Audi turbo problems (or any vehicle for that matter), then get in touch and find out what we can do for you.
Do You Repair Other Turbo’s As well?
Although this article is targeted to our customers with Audi 1.9 & 2.0 TDi’s (DPF Models), we repair all types of turbocharger units for all makes & models. If your unit is non-repairable, we have many rebuilt units in stock ready to exchange & dispatch same day. We also carry new units on some of the more commonly known non-repairable turbos or where new units are the more affordable option.
What Guarantee Will Sinspeed Give Me?
All turbocharger rebuilds are backed by a 12month warranty for complete peace of mind.
For an instant quote, call us today on 0203 815 9441.