Timing of vw engine. You'll need a timing light connected to the number on spark plug wire. On the top of the transmission, below the cylinder head, you should see a round plug, (usually green) with a clear plug in it. Remove the plug, you can then see the flywheel, there will be marks on the flywheel to set the timing. I'm facing a puzzling issue with my Volkswagen Transporter T5 2.5 BNZ engine and could really use some expert advice. I've been experiencing an under-boost problem that's causing the inlet pipe before the EGR valve to collapse due to negative pressure in the inlet system. Manufacturer: VW, Date(s) Used: 06/2005-05/2006, Model: Transporter, Engine Code: AXD, 96Kw, 131PS, 2.5 Ltr, 5 Cyls, Remarks: Turbocharged Direct Injection Pumpe Düse (TDI-PD) So I've just changed the model to Caravelle and the same on the transmission code. Once the brake pads and wear sensors are replaced, reset the brake pad warning system by turning the ignition switch to the "on" position. As long as continuity to ground exists through all the brake pad wear sensors the system should reset and the pad warning light in the dash will go out. If the pad warning light does not go out, a check of Volkswagen Multivan 2.5 TDI (2003) vs Volkswagen Transporter T5 / Caravelle / Multivan Comfortline 2.0 Bi-TDI 180HP 7seats (2013) Volkswagen Multivan 2.5 TDI (2003) vs Toyota Hilux 8 Double-Cab 2.4 D-4D 150HP 4x2 (2016) just a short video on timing marks for the VW 2.5 tdi engine, also in the Volvo's, engine codes etc etc avr anj or d5252 TDI timing is critical so that the ECU can adjust it within the chosen programmed parameters.The pump belt should only be changed if you have vagcom to check the timing is within scope after replacement.The two tensioners on the belt run do seperate tasks-the back one is static but can be moved to and fro once the 16mm not has been released,this will fine tune the timing.The front tensioner is How is the pump timing measured? Could it be something to do with the injector that's instrumented? I originally thought it could be to do with the wobble on the camshaft injection pump sprocket - but I don't thin it is any more. timing marks on a 5 cylinder vw transporter. Answered in 5 hours by: VW Mechanic: Wolfgang. Wolfgang, VW Master Technician. Category: VW. Satisfied Customers: 6,753. Experience: Senior VW Master Tech 15 yrs. Verified. can i have your vin # XXXXX the exact information please. Posting Permissions. I bought a 2006 VW 2.5 tdi T5 Transporter bus which was converted into a motorhome about 2 years ago. From CT to Jhb, I experienced fuel starvation after filling up with diesel at Kroonvaal for first time of the trip from CT. I have removed filter and emptied it, tapped the filter against a hard surface and refitted it KpPqTGi.