[E93Blackhawk]

Hi guys

Another post i guess about WG rattle issue. Before i explain, I'm not entirely sure its 100% the waste gates, the car is stock, running perfectly fine, and my boost (for what it feels like) is fantastically strong and is pulling very well.

However on startup (normally cold) it will rattle for maybe 1 second, in cursing, downshifting, changing gear and stopping etc there isn't any rattle, but turning off the engine when i park up, there it is for 1 second also.

Ill post up a video tomorrow of it so you guys can get a better idea, i have no low boost codes etc so its not bad enough to worry at the moment, however i would like to diagnose it so if it becomes more problematic I know what to start fixing etc.

I read a post about Procede having some wastegate user adjustable positioning feature? Does anyone have any idea or more info on this and does it work?

"To adjust base wastegate position, you will adjust the Wastegate Position user adjustable. The default value is 90%. If your car has wastegate rattle during idle, light cruise and decceleration conditions, try reducing this value. Reducing this value, will move the wastegates more open during these conditions. At the mimimum value of 30%, wastegates will be fully open. Try to keep this value as high as possible in order to maximize initial tip-in boost response. If your car has no wastegate rattle, you can simply leave the default value of 90% unchanged."

Copied from vishnu's forum admin.

thanks guys

[E93Blackhawk]

I read up also that it could potentially be the exhaust valve, because i get no rattle when driving as mentioned, only on cold start up, and I've heard it once switching the engine off.

Is the exhaust valve considered as the golf tee mod - and are these the same thing? Because i guess I can check if so by unplugging valve lead in the boot as so many do and see if the noise is still there i guess.

Im currently not in warranty also, but I'm going to take warranty out that will cover everything and I guess if I diagnose the issue, it can be fixed.

[E93Blackhawk]

Nothing?? Most common problem with the n54... Come on guys..

[ign335i]

Originally Posted by E93Blackhawk

Nothing?? Most common problem with the n54... Come on guys..

Wait, just to be clear, you are concerned with a 1 second rattle that only happens on startup and when you turn the engine off. Not sure of this is a troll post?

[eric@helix]

1 second is short for startup WG rattle. What's your oil level sensor saying?

[caliguy562]

Stick or auto?

[eforty6_m3]

hey OP, whatever came of this? And where's that dang video? I'm trying to figure out if I'm suffering from WG rattle, or if it's simply a heatshield rattling somewhere. Thanks!

[chris23023]

New member here, so please don't flame. I have the same issue, but it lasts until the car is warmed up- and only happens on a cold car. Sounds like an exhaust rattle almost. I am looking forward to an answer or a reference to another thread for reply