Wastegate stuck or was tightened to much by the rebuilder

[bbob203]

I think i have found the source of my turbo issues. Im boosting well over 25+ psi... I was originally using a regulator for a boost controller and had the boost gauge running off that so i was oblivious that the intake pressure was well over what my boost guage was reading. When i was just out at Andrews I re routed my boost guage line to read off i/c pipe pressure and installed a ball and spring type boost controller. My intention was to adjust and tune whilst driving home from arizona. No matter what i did i could not get the boost turned down.. my gauge only reads up to 20 psi and it is going way beyond that on full pedal/load up an incline etc so im suspecting <25. I tried to test my waste gate opening pressure today with a pump and it wouldn't open. Should i try to adjust it?

[CRSMP5]

that happens to the k14... i doubt they screw with those wastegates also as there is no replacements...

how did you plunmb it up?? manifold to regulator, same side has t for gauge.. other side goes to wastegate..

[bbob203]

plumbed the gauge from the top fitting on the regulator.

[CRSMP5]

ohhh yea forgot you used the gauge on fiitting on the regulaor.. see i told you to use a t

12 mo warentee on turbo... so talk to them... but i assume they did not take it apart as to break it ruins the turbo as no parts...

[bbob203]

Yea would've been nice to know that when i spent the 200 bucks on it..     any other way to make it work so it isnt boosting so much..

[bbob203]

took the turbo/ exhaust mani off this afternoon was succesful in removing 2/3 of the bolts holding it on third one isnt a lost cause yet. Hopefully will be getting a replacement wastegate from rust caddy if i cant get this one freed up.

[theman53]

You should be able to once you get it out. I want to say Jake had a writeup from early 2000's that detailed how to.

[libbydiesel]

Did you squirt penetrating oil into the boost fitting on the wastegate?  Did you back off the adjuster on the end?

[bbob203]

ah didn't even think to do that w/ penetrating oil.  This sucker has to be pretty stuck though because it was ultra sonic cleaned when it was rebuilt. You would think that would do it.

[bbob203]

well i pullled the exhaust side off the rest of the turbo and i got all the bolts out succesfully  . Waste gate is loose but i cant pull it out of the exhasut housing im soaking it with some pb blaster and heating it only have a map gas torch though.

[bbob203]

got it out!! its seized though permanently too i think.. 

[bbob203]

Success!! its freed up and working ! They must have known they would freeze up because there is a 8mm allen in the wastegate valve head. To free it up a used a deadblow hammer to pound the valve down soaked with pb then twisted it with an 8mm repeatedly until i could push it down with my hands. I suppose as regular maintenance i will spray some oil into it now and again.

[libbydiesel]

Now is the best time to use valve lapping paste to clean of the seat in the turbine housing.

[theman53]

Now is the best time to use valve lapping paste to clean of the seat in the turbine housing.

This was in the post of *I think* JakesFSPD or something like that. He was losing 5 psi at 20 psi of boost through the wastegate or something similar. After he was done it was around 1 psi or something. That was way back in the day, but a good post. Some like Libby and others may do it on their own or have been around and remember it like I did.

found the guy  name is fspGTD
http://www.vwdiesel.net/forum/index.php?topic=3252.0
http://www.vwdiesel.net/forum/index.php?topic=1841.0

[bbob203]

I lapped it smooth as I could get it as it was slightly pitted in a few spots. Went and bought a few stainless socket cap bolts cleaned it up chased the threads and bolted it in. Tomorrow I will get it all put back together and see how it runs. Knowing that the wastegate it free and working I guess I wont need a boost controller? I can just set the wastegate to open at the desired pressure?