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How much wastegate actuator rod movement?

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Old 12-12-2004, 06:16 PM
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Default How much wastegate actuator rod movement?
Today I replaced a defective N75 (boost pressure control valve) on my '99 1.8TQ (135 K mi). Before finishing the install I applied vaccuum to the control rod actuator to check movement. I couldn't see any. Does this mean the actuator assembly is shot? How much vacuum is needed? Bob
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Old 12-12-2004, 06:26 PM
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it isnt vac operated it is pressure operated
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Old 12-12-2004, 06:26 PM
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Default most of the ones I see fail.... the fasteners on the wastegate end actually fall off and the gate...
is let flop open and around on its very own.
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Old 12-12-2004, 06:29 PM
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aka you are pulling on a door with the word "push" on it
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Old 12-12-2004, 06:35 PM
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Default use one of those compresed air cans
you'll see it work. That's how I taught my gf how a turbo actuator ("thingy" her words) works. The rod will move and all that good stuff.

-me
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Old 12-12-2004, 06:42 PM
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you on AIM right now?
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Old 12-12-2004, 07:13 PM
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I'm on
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Old 12-13-2004, 07:25 AM
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Default Re: How much wastegate actuator rod movement?
My confusion!. I thought it was vacuum operated. I now realize it's pressure operated. In road testing the car, it seems to work ok. I've got VAG-COM so I can check boost pressure. Anybody give me procedure for doing that?
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Old 12-13-2004, 03:55 PM
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Default you cant check boost pressure on a 99 with a VAG Tool.
They do not have a boost pressure sensor. You need a boost gauge.
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