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Wastegate stuck or was tightened to much by the rebuilder
by
bbob203
on 01 Oct, 2013 14:57
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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?
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#1
by
CRSMP5
on 01 Oct, 2013 15:20
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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..
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#2
by
bbob203
on 01 Oct, 2013 15:24
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plumbed the gauge from the top fitting on the regulator.
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#3
by
CRSMP5
on 01 Oct, 2013 15:28
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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...
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#4
by
bbob203
on 01 Oct, 2013 15:53
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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..
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#5
by
bbob203
on 01 Oct, 2013 22:04
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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.
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#6
by
theman53
on 01 Oct, 2013 22:10
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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.
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#7
by
libbydiesel
on 01 Oct, 2013 22:10
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Did you squirt penetrating oil into the boost fitting on the wastegate? Did you back off the adjuster on the end?
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#8
by
bbob203
on 02 Oct, 2013 07:55
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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.
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#9
by
bbob203
on 02 Oct, 2013 11:02
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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.
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#10
by
bbob203
on 02 Oct, 2013 11:28
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got it out!! its seized though permanently too i think..
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#11
by
bbob203
on 02 Oct, 2013 12:37
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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.
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#12
by
libbydiesel
on 02 Oct, 2013 14:14
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Now is the best time to use valve lapping paste to clean of the seat in the turbine housing.
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#13
by
theman53
on 02 Oct, 2013 20:34
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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=3252.0http://www.vwdiesel.net/forum/index.php?topic=1841.0
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#14
by
bbob203
on 02 Oct, 2013 21:02
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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?