VNT turbo actuator changeout

This forum is for TDI (Turbo Direct Injection) questions/posts. Non-TDI Motors (Including the 1.6, and 1.9 or other variant turbo diesel motors) should go in the VW Diesel General Forum

Moderator: Fatmobile

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sgnimj96
Diesel Freak
Posts: 141
Joined: Thu Feb 20, 2014 2:08 pm

VNT turbo actuator changeout

Post by sgnimj96 »

How many gaskets do I need to get to change the turbo actuator in an ALH? (doesn't hold vacuum)
Just the manifold and downpipe, or is there a few more that I should get?
I may need to clean up the turbo inside as well after I take the assembly off, never messed with a turbo before.
81' Scirocco 1.6D (conversion)
86 Golf 1.6D
85' 300TD
Fatmobile
Global Moderator
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Joined: Wed Oct 30, 2002 10:28 pm
Location: north central Iowa
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Re: VNT turbo actuator changeout

Post by Fatmobile »

I suppose when a VNT-15 is on a TDI
it's hard to get to without removing the manifolds.
Probably can't just come at it from underneath.

I'm not much help with this one yet.
Though I do own a TDI project,
I'm just starting to figure these out.

I have pulled several of these vacuum motors apart before.
On the rabbit VNT-15 projects I switch from vacuum to boost actuated.
'91 Golf gasser converted to turbo diesel.
'83 Rabbit gasser, converted to diesel, then converted to run on vegetable oil.
2, '84 GTI projects cars
sgnimj96
Diesel Freak
Posts: 141
Joined: Thu Feb 20, 2014 2:08 pm

Re: VNT turbo actuator changeout

Post by sgnimj96 »

I'll be pulling the whole manifold, there is an exhaust leak going on too. I have to keep the a/c blower on recirculate or smells of exhaust inside a bit.
81' Scirocco 1.6D (conversion)
86 Golf 1.6D
85' 300TD
sgnimj96
Diesel Freak
Posts: 141
Joined: Thu Feb 20, 2014 2:08 pm

Re: VNT turbo actuator changeout

Post by sgnimj96 »

well after removing the actuator, the turbo vanes weren't sticking at all - so I decided to keep it simple and not take more apart than needed.

finally got the new actuator
Vacuum still wasn't making it to the new actuator - turned out the vacuum check valve was stopped up with crud?
cleaned it out and it didn't work anymore as a check valve but allowed vacuum and turbo works now. Got one coming from oreally's (uro version $9) - those things are WAY overpriced.

I do need to hook up a temporary boost gauge since I don't have vagcom. I'll worry about the exhaust leak later, I didn't see any visual evidence while under there..
81' Scirocco 1.6D (conversion)
86 Golf 1.6D
85' 300TD
Fatmobile
Global Moderator
Posts: 7434
Joined: Wed Oct 30, 2002 10:28 pm
Location: north central Iowa
Contact:

Re: VNT turbo actuator changeout

Post by Fatmobile »

Glad you got it working.
Sounds like a simple fix.
'91 Golf gasser converted to turbo diesel.
'83 Rabbit gasser, converted to diesel, then converted to run on vegetable oil.
2, '84 GTI projects cars
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