So after removing my 02 dump lastnight, I thought I would check this rattle that I've been hearing around my 02 housing area. With the WG actuator attached the actuator door is shut tight with no movement. But when I removed the WG actuator and manually move the level for the door it has a good amount of play to cause a rattle. Is there anyway to adjust that or fix it. I'm pretty sure that's the cause because I can only hear it after making one good pull when I had my o2 dump on, then my car sounds like it has a bad exhaust leak with a rattle.

 

Your WG Arm should be preloaded, the only time the flap could rattle is when the WG arm opens, which means your in boost and couldn't hear a rattle anyway. Did you used a seperated gasket thats intended for an o2 dump?

 

If that WGA is tight on there, it shouldn't be an issue. I'd check and make sure your downpipe bolts are tight (but not too tight) and that there isn't movement on those springs around the bolts. Mine were a little loose and it made my knock sensor go off.

 

Yes I used a seperated gasket for the o2 from map. You can only hear the rattle after hitting boost after 5grand. Then when I slow down and come to a stop u will hear a exhaust leak/rattle. I also check my downpipe bolts and everything is tight.

 

Exhaust manifold gasket maybe bad? When coming to a stop, its not the flapper, that thing is closed.

 

So I put on my stock ported o2 housing and I can't hear any rattle. I'm gonna have to try and putting the dump back on, on Thursday.

 

I adjust the WG preload 2 spins tighter as well.

 

Someone with an o2 dump chime in, maybe it's just noisy enough that you can hear it without the pipes connected up. I certainly can't hear mine, but I don't dump

 

After putting the dump back on today and hitting boost. The car still sounds like shiet and I have that rattle still. Everything tight, I also have already adjusted the preload on the WG 2 spins. After returning home I put my hand by the dump pipe and you can feel the exhaust leak. You don't feel that at idle when I don't hit boost. Any more suggestions?

 

This seems like my problem, got it from another thread.

"I hope it's not another case of a failed wastegate flapper valve weld. Whereby the wastegate port in the turbine housing is constantly open due to the flapper valve separating from the pivoting arm's shaft."

 

I had the exact problem when I installed my o2 eliminator DP from MAP. I took it off 3 times thinking it was not bolted down all the way. I could also feel the exhaust outta the dump tube as well.

I ended up coming across mellons thread about wg actuator pre load. I tightened the wg and problem was solved.... You're gonna want to tighten it more then 2 turns too.

 

Yea I think that solved it, I've turned it s total of 3 times. Seems to have solved it but I haven't tried hitting boost hard yet. I will find out tomorrow if it solved it!

 

Sounds like the problem I'm having I going to check on the wg

 

5 year old post still helping i had a crazy rattle i thought my turbo was blown. i checked the wastgate and come to find out it was set for perfect zero preload.