2004 Touareg 2.5 TDi R5 missing / booming noise from engine

This noise is coming from the engine bay, particularly by the air filter. The noise can be cancelled by moving the valve / flap as shown, but there is something wrong in the engine. Suspect is injector, valve, piston or something else, but without a plug in diagnostic, I'm open to suggestions.
Update: The problem was a worn camshaft and followers. I replaced them with the engine in the car. It took around 5 hours, with the hardest part getting to and removing the tandem diesel and pneumatic pump. The parts I used were www.ebay.co.uk... plus I bought the special tools, www.ebay.co.uk....
I hope this helps someone.

[@mitchellmounts9044]

Had this noise on my V10 TDI. Its a worn hydrualic lifter/camshaft, and its not opening the exhaust valves properly. If you grab the charge pipe and can feel the pulsing in your hands thats exhaust gasses getting blown back into the intake when the intake valve opens after the exhaust stroke. At least you only need to by 1 set for the 2.5 unlike me who to buy 2 sets for the V10 😅

[@martinshaw254]

Was it both camshafts that had worn or just the one? You are right, I only had to replace one camshaft and one set of followers. As I have said, once you have the special tool for setting the timing, the job is pretty straight forward if you take your time.

[@mitchellmounts9044]

@@martinshaw254 i should of replaced them both at the same time. Im not sure how the 2.5 TDI is set up but the V10 only has two camshafts one on each cylinder head. Like i said, i raplced the passenger side cam and all 10 lifters, then about 2k miles of driving later the driver side lifter wore out and had to replace that cam and another 10 lifters over there. Ive put about 90k miles on it since then, no enegine issues since then.

[@adrianzehentner6818]

@@mitchellmounts9044 kzbin.info/www/bejne/foO7eXmFlLeombM&ab_channel=ZbigniewN-Narloch

[@adrianzehentner6818]

@@mitchellmounts9044 kzbin.info/www/bejne/lZOumpiigLCFhsk&ab_channel=ZbigniewN-Narloch

[@Torchi0]

Sometimes there is gunk in the valve seat, making it not seal propely, if you drive it for long, the gunk will move and allow the valve to seal. Check again after driving for about 40 min if its hot outside.

[@dariuszkrol6221]

That’s exactly what happened to my car - T5 2.5 AXD. After cleaning the intakte’s manifold i re-installed it and saw same engine’s behavior as in the movie. 30 min on a highway did the job. Now the engine works nicely.

[@TDIPOWER2209]

Camshaft and hidraulic lifter's, exactly like 1.9 tdi Same problem on 1.9 and 2.5 tdi R5

[@abdullahnatafou9405]

Jai la meme bruit dans un R5 jai voulais savoir si j’ai pris Arbre cames de 1.9tdi il va marcher dans un touareg R5 ou c’est pas la même moteur ?

[@eurikcecarvalho1955]

Dá partida o motor gira sem compressão hora funciona hora não funciona como resolver

[@ceet12]

​@martin shaw Hi. Thanks for the video. I have exactly the same problem however mine is basically so bad it is undrivable and black smoke is excessive on idle. Did your vehicle suffer from excessive smoking? Regards

[@martinshaw254]

No excessive smoke, just the booming noise

[@ceet12]

​@@martinshaw254hi Martin. Did it have low power aswell? Regards

[@martinshaw254]

@@ceet12 it was more undrivable than a loss of power.

[@ceet12]

Thanks martin yes the one I have sat up had no power very slow. Booming popping back and black smoke as obviously the exhaust cam is affected. Its an auto and I've now got an issue with my leg so need to get it running ASAP. The cam timing tool you bought the link you posted doesn't seem to work. Can you provide details of that? Thanks for the reply!

[@MecanicDeWeekend]

​@@martinshaw254 whats the issue i got the same noise v6 3.0 tdi

[@Mohamed-s4x7v]

Bonjour, faut-il enlever le moteur pour changer l’arbre à cames ? Merci d’avance

[@martinshaw254]

No, the engine remains in the car. It has restricted access and is very tight, but it can be done.

[@Mohamed-s4x7v]

@@martinshaw254 ok merci beaucoup

[@josealbelda6859]

Y que era al final

[@josealbelda6859]

Se abse

[@hasancetin2550]

Aynı sorun benim transporter da var problem nedir arızayı nasıl çözümledin

[@UnitedLoyalist]

See description. Was camshaft and followers? Details in description

[@josueescalona8899]

Hola,saludos desde España. Me pasa lo mismo con mi touareg r5, al final que era el problema y cual la solución por favor,gracias

[@martinshaw254]

Hi. The problem was the camshaft. it had worn. Replaced it and all good.

[@josueescalona8899]

@@martinshaw254 muchas gracias amigo es difícil de cambiar para hacerlo yo. O seria necesario ir al taller. Saludos

[@martinshaw254]

@@josueescalona8899 I changed the camshaft myself. I did not remove the engine from the car. It took about 5 hours. The hardest part was removing the diesel / pneumatic pump at the rear of the engine. I also purchased the special tool to line up the camshaft and crankshaft.

[@josueescalona8899]

@@martinshaw254 Muchas gracias por tu tiempo. Seria de agradecer si tienes el tutorial de como se hace por favor. Saludos y gracias de nuevo

[@martinshaw254]

@@josueescalona8899 I watched many videos on KZbin from all around the world. I also watched videos changing the camshaft on a VW T5, which is the same engine, but mounted transversely.

[@Flash635]

That flap is only the EGR. They gunk up a lot. Try cleaning it out with Mr Muscle or some other oven cleaner. kzbin.info/www/bejne/ZmeqoWuEo6-qjsU

[@rickyperks3895]

Hi what kit did u buy to replacement

[@martinshaw254]

Hi. All parts for the kit and special tools are in the description. Hope this helps and good luck.

[@rickyperks3895]

@@martinshaw254 what would u charge to do ??

[@martinshaw254]

Unfortunately, it's not something I am able to do, sorry.

[@mohamedsagem5856]

Where is the probleme

[@MecanicDeWeekend]

Whats the fault i have same problem

[@papyk3658]

hole in the intake

[@roncmp77]

Any kit recomended?

[@martinshaw254]

This is the kit I used, www.ebay.co.uk/itm/142384737209 plus I bought the special tools, www.ebay.co.uk/itm/264656812432

[@yunusicimli1512]

Bad cam shaft

[@MecanicDeWeekend]

@martin shaw can you plesse help ?

[@rickyperks3895]

Worn camshaft and lobes not a cheap job

[@FadmaHoussayni]

J'ai eu le même bruit et c'est l'arbre à cames le problème

[@martinshaw254]

Yes, the cam lobes had worn so replaced the camshaft and followers.

[@tricomas75]

I had the same noise It was camshaft

[@martinshaw254]

Did you have the camshaft replaced? If so, can it be done with the engine still in the car or is it an engine out to remove the cylinder head?

[@tricomas75]

@@martinshaw254 yes I replaced the camshaft remove only the valve cover And engine out For timing Look this video kzbin.info/www/bejne/h4Wqpp6VaJ2hjZY I've seen videos that do not take the engine but it is much more difficult

[@martinshaw254]

@@tricomas75 I replaced the camshaft and followers today, with the engine in the car. A bit tricky but got there in the end.

[@MarekMikulaAlbrechticeBrusel]

@@martinshaw254 Hi, did this fix the problem? Can you record the sound after the change? Is it much different? I have the same sound on the R5 in my T5, but it's been there for like 100k kms now and doesn't seem to be getting worse.

[@martinshaw254]

@@MarekMikulaAlbrechticeBrusel the booming sound has completely disappeared and now sounds like it does in the clip between 0.22 and 0.28 seconds. The cam lobes were very worn on the camshaft and all the followers were worn and dished. On one of the followers, the top had completely worn through. On a T5, I would think it is easier to get to the cam gear end and remove the tandem pump but might be tricky to fit the crank shaft lock and cam lock (both in the special tool kit needed for this job) to the left of the engine?