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All Technical Service Bulletins for Air Injection Bypass Valve: > < Charge Pressure Bypass Valve - Groaning/Howling
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Air Injection Bypass Valve: Customer Interest
Attachment Bulletin # 210001

Group: 21 
Number: 00-01
Date: Dec. 8, 2000

Subject:
Charge Pressure Bypass Valve, Noisy

Model(s):
TT with 1.8L Turbo

2000-->

(eng. codes ATC, AMU, AWP)

Condition

Groaning or howling noise from engine compartment when accelerating during partial load between 2500-3000 RPM.

Rattling noise when decelerating between 2000-3000 RPM.

May be caused by the Internal diaphragm of the Charge pressure bypass valve producing pulsating noises.

SERVICE:

-

Road test to verify condition.

-

Remove upper engine cover.

-

Remove Charge pressure bypass valve.

-

Install new Charge pressure bypass valve, Part no: 06A 145 710N.

-

Install upper engine cover.

-

Road test to verify condition has been eliminated.

CAUTION!

Part numbers are for reference only. Always check with your Parts Dept. for the latest parts information.

All Technical Service Bulletins for Air Injection Bypass Valve: > < Charge Pressure Bypass Valve - Groaning/Howling