Alright the other day I was driving along and the road dropped off into a cul-de-sac and I hit pretty hard. Ever since then I have heard a rattle coming from the engine bay but only when i accelerate and only in gears 2+ so its basically whenever my turbo spools i hear a rattle. its slightly noticeable in the video if you listen closely. Everything seems like its tight and in place no vband clamps loose or anything. The turbo still spools and doesn't whistle like its blown or anything. it has no problem building boost.

S256et turbo with manual boost controller (ZZP stage 3) untuned
LDK block
ZZP big turbo downpipe with recirculate wastegate.
modern performance catback

Cant get it up on blocks till Sunday.
Any suggestions what to look at? I cant find the rattle

https://www.youtube.com/watch?v=j0z7...ature=youtu.be

 

Almost sounds like cams/ valves area..

 

It doesn't rattle when I'm out of gear and rev or when I'm in first and rev. Just 2nd or more when it builds boost.

 

Could it be the waste gate? What does a bad waste gate sound like? Its only when I build boost I was in 2nd this morning on the way to work and just cruising in 2nd nothing but as soon as I tap the gas and the turbo spools it rattles. Bov sounds fine. I can hear the slight whistle of the turbo spooling. It sounds like an exhaust leak or a tractor but only when the turbo builds boost. Im not throwing any cel's for any issue I felt around the downpipe and I can't feel any cracks around the recirculation tube.

 

Update I believe its the wastegate stuck open and rattling.
new symptoms:
It would start rattling and I would struggle to build boost where I was use to it building boost
At random times it would catch and shut and I would build boost way past 5-7 lbs where the manual boost controller is set during this the rattling would stop then im talking 10-15 psi and it would build quick and wouldnt let out till i shifted
after the BOV would do its thing and I shift it rattles and barely builds boost again.
This is the tial BPV that ships with the ZZP turbo upgrade kit. I have had it since May/June do you think this warrants return for a new one?
Is it rebuild able?
Should i take it apart and see whats up on my own or send it somewhere professional?
Or should I just bite the dust and buy a new one?

 

Tore into it last night, Couldnt take it any more.

Top 2 turbo to manifold bolts backed out a little, when i bottomed out the turbo pulled away a bit and the gasket was acting like a duck call every time it started pushing pressure
Fixed now.

 

been there done that but it was the top right turbo to manifold bolt, lol,