VGT Actuator Piston Seals - Diesel Forum -
6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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post #1 of 3 (permalink) Old 02-13-2016, 02:36 PM Thread Starter
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VGT Actuator Piston Seals

Hello Everyone,

This is my first post with you guys. I have been doing a lot of searching and have not been able to pinpoint an answer to my question. Hopefully I can find some help here from some of you more experienced individuals.

Problem at hand- while disassembling a friends Garrett gt3782va turbo which has been giving him lots of problems, I found that the Actuator Piston for the vanes is missing both of its oil seals. I have been looking all over online for either the seals or the complete piston assembly and have not been able to find anything.

Also with these seals missing, what effect would it have on the function on the unison ring?

And one last question, with a new quality Compressor wheel and Turbine wheel installed will the balance be way out of whack now?

Thank You

Turbo Information and brief history
2007 Model
*Turbo has a Remanufactured sticker on it but Owner stated he has never had turbo serviced and has owned truck since new. Dealer has performed many other repairs on truck in the past though.
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post #2 of 3 (permalink) Old 10-07-2019, 11:18 PM
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My turbo also had no seals. What did you end up doing? I can't find any parts like you mentioned.
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post #3 of 3 (permalink) Old 10-21-2019, 11:29 PM
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I know this is a old thread but to add my 2 cents. I just replaced my turbo at 200k I just decided to put a whole new unit on. I wasn’t honestly having any issues I just didn’t want to deal with them down the road. These turbos have come way down in price and if possible I would just suggest to replace the whole unit. I am sure some would disagree but it just made since for me to replace it entirely. I would suggest if you have a problem child do the same thing.
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