Larzzz

Replaced oem turbo with aftermarket oem turbo...was running 23psi before now am at stock settings (holds 15psi spikes a little higher).

Pressure tested wastegate with mighty vac...smoke tested vacumm..no leaks..wastegate holds fine...do i need to adjust the rod?

please help any input works

ECaulk

iTrader: (6)

Where did you locate a aftermarket OEM turbo?

You need to pressure test the system up to 25psi to make sure there isn't a boost leak that caused your first turbo to blow. Did you transfer the wastegate actuator from your blown turbo to the new turbo?

Larzzz

turbochargerpros.com....

new turbo came fully assembled with wastegate actuator....

i pressurized the wastegate up to around 25psi...held fine no leaks!

Orignal turbo had too much shaft play so i replaced it before it blew

blueLNFftw

iTrader: (16)

Did you set the wastegate prior to installing it?

Larzzz

i cant answer that question because i didnt do the actual install of the turbo....which is my original question..does i need to shim the wastegate rod?

blueLNFftw

iTrader: (16)

It does not need shims.

What needed to happen was verification the wastegate had 0 preload or postload on it.

Basically, you hold the actual exhaust housing flap completely shut. You move the jamb nuts on the rod and lock them in place with no tension on the flap.
When you let go the flap opens and you can install.

Doing this insures that the pressure rating the PCM gives the WG control solenoid is absolute. If you have any pre or post load on it there can be a disconnect.

In your case the PCM could be seeing pressure of 23psi and letting the wastegate crack open. You have post load on your WG rod and its actually only giving you 15psi.

Larzzz

i can hear the air flutter out when holding 15psi which makes me thinks it is a wastegate issue...kinda confused on what your trying to say...appriciate the help from everyone!

sc4door

iTrader: (8)

If you pressure tested the wastegate, are you sure you don't have a bpv that's leaking/opening above 15 psi? If you have the old turbo, try swapping it's bpv into the new turbo. I'm not promising it will work, but if it's a part you have, it can be easily swapped and then that is just one more thing to eliminate

Larzzz

I did this as well!! Have a forge bpv...took it off..put stock bpv back on...no difference same problem!

I've always had the forge bpv...with the "softer" spring installed...i really dont think this is my issue but I had the stiffer spring that i havn't tried yet to see if this will work..

sc4door

iTrader: (8)

Ok that was my only idea, if it never did it on the old turbo with the softer spring, I couldn't see that being the problem but I guess you never know. Good luck with it, hopefully it's something simple

KMO43

If the wastegate is a bit open it will bypass the exhaust turbine and won't hit full boost. To check loosen off the nuts on the actuator pull the wastegate arm TOWARDS the actuator touch the arm with the nut closest to the actuator back the nut off 3 or 4 turns towards the actuator to set ur preload and it's done

Larzzz

let me try this KMO43...thanks to all you guys on here!! I will let you guys know how i make out

KMO43

No problem pm me if u need anymore help

ECaulk

iTrader: (6)

When I say pressure test the system, I mean the air charge system. How did you pressure test the wastegate to hold 25psi? Did you build a rig to connect to the turbo so you could pressurize the exhaust housing?

Depending on how the leak sounds that you can hear it could be the gasket failing between the exhaust manifold and the turbo. Loss of exhaust pressure causes a direct loss in intake pressure.

KMO43

When I was playing around with actuator spring pressure I built a nifty little tool to see the Crack pressure of the wastegate

ECaulk

iTrader: (6)

Assuming this wasn't a simple little tool to fab up, did you by any chance take physical measurements of the stock wastegate? Still wondering if the efr wastegates would fit the stock turbo

KMO43

I actually had stuff laying around my garage to build the tester it was strictly to test wg break pressure and how increased spring pressure affected the ability of the k04r to hold top end boost I gave Matt my spring pressure results and he came up with the bolt on part.

I have an extra efr actuator for my zfr at home so I can measure it up if you know which measurements you want