Thinking about performing a delete on your 2015 TDI? As someone who has personally tackled this job, I can offer some insight into the process and what to expect. While I ultimately decided against reinstalling the stock emissions components, opting instead for modifications, understanding the removal process is crucial for any TDI owner considering this path.
From my experience, deleting the Diesel Particulate Filter (DPF) and related components on a 2015 TDI is definitely achievable for a determined DIYer. However, it’s not a quick afternoon project. Set aside a full day, especially if it’s your first time. If I were to repeat the process, I could probably shave it down to several hours, having learned the nuances.
The most challenging aspect of the entire delete procedure was wrestling with the triple square bolts on the EGR cooler. These bolts are notoriously difficult to access. The key is having the right tools: a short triple square bit combined with wobble and swivel extensions. Patience is key here. Once you manage to break those bolts loose, you can usually unscrew them by hand.
Alt text: Close-up of a TDI engine bay highlighting the EGR cooler and DPF system components typically removed during a delete.
After dealing with the EGR cooler bolts, the next step involves creating enough space to maneuver the DPF out. This requires some engine tilting. Using a helper, or tools like a scissor or bottle jack, gently rock the bottom of the engine forward. This movement provides just enough clearance to drop the DPF down between the engine and the subframe. It’s a bit of a tight squeeze, but with careful manipulation, the DPF will come out.
While removal is manageable, I wouldn’t particularly relish the task of reinstalling all the deleted components. It’s certainly doable, but requires effort and precision to ensure everything goes back together correctly.
My decision to modify my Golf TDI stemmed from a few factors. I purchased it used, and the Dieselgate restitution I received wasn’t substantial enough to incentivize me to reinstall the emissions system later on. Furthermore, I got a very favorable price on the car due to the initial diesel emissions scandal fallout, making further modifications a more appealing option for me.
Alt text: Diagram illustrating the placement of the Diesel Particulate Filter (DPF) and Exhaust Gas Recirculation (EGR) system within a vehicle’s exhaust system.
For those who are hesitant to fully delete their TDI, especially concerning warranty implications, there’s a less conspicuous performance upgrade to consider: the CR190 turbo. This turbo is essentially a factory part from higher-performance models and is almost a direct swap. You’ll need the correct OE outlet damper to complete the installation. From a visual inspection, most dealerships would be unlikely to notice this upgrade, as it’s a genuine OEM component. However, it’s worth noting that dealer policies can vary, and some might be stricter even with OE upgrades.
In conclusion, deleting the DPF on a 2015 TDI is a feasible DIY project, albeit somewhat involved. The EGR cooler bolts and DPF removal are the trickiest parts. For those seeking performance gains without the full commitment of a delete and potential warranty concerns, the CR190 turbo upgrade presents a more subtle alternative. Ultimately, the best path depends on your individual circumstances, priorities, and comfort level with vehicle modifications.
