19 Coolant pipe seepage on turbocharger
19 17 82 2036167/6 March 21, 2017. Supersedes Technical Service Bulletin Group 19 number 16-76 dated
December 6, 2016 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A8, S6, S7,
S8, RS 7

2013 - 2017

All

4.0 T

Condition
REVISION HISTORY
Revision

Date

Purpose

6

-

Revised Service (Updated SVM code)

5

12/06/2016

Revised header data (Added models and model years)

4

10/19/2016

Revised Service (Removed S6/S7 MY13 SVM code)

Customer concern states one of the following conditions:
 The low coolant level light is illuminated
 The coolant level is too low
 A black crust is visible on the turbocharger coolant lines

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© 2017 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Background
There may be slow coolant loss
from the connections at the coolant
feed pipe and the coolant return
pipe. High temperatures cause the
coolant to become encrusted on the
connection flange of the
turbocharger (Figure 1).

Figure 1. Black, encrusted coolant residue (outlined area), coolant
feed pipe (A), oil feed pipe (B), and coolant return pipe (C).
The resulting heat after switching off the engine can, under special operating conditions, lead to very high
temperatures on the coolant seals of the turbocharger. This can damage the O-ring.

Production Solution
Optimized temperature-resistant O-rings on the coolant connection of the turbocharger together with an extended
operating period of the auxiliary cooling pump after switching off the engine.

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© 2017 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Service
Replace the respective O-rings on the coolant supply and return pipes according to the table listed below:

Coolant line position

Part number of coolant pipe

Part number of
optimized O-ring

Size of O-ring /
thickness

Cylinder bank 2, supply

079145909F Original pipe

WHT006335A

2.0 mm (blue)

Cylinder bank 1, supply

079145910F Original pipe

WHT006335A

2.0 mm (blue)

Cylinder bank 2, return

079145947E Original pipe

WHT006335A

2,0 mm (blue)

Cylinder bank 1, return

079145948F Original pipe

WHT006335A

2.0 mm (blue)

Cylinder bank 2, supply

079145909H Replacement pipe WHT006537

2.8 mm (black)

Cylinder bank 1, supply

079145910H Replacement pipe WHT006537

2.8 mm (black)

Cylinder bank 2, return

079145947G Replacement pipe WHT006537

2.8 mm (black)

Cylinder bank 1, return

079145948H Replacement pipe WHT006537

2.8 mm (black)

Note: The O-ring assignment can be based on one part number on the coolant pipes, as there is no mixed
installation allowed. The original coolant pipes had a 2.5 mm O-ring groove which require the 2.0 mm (blue) Orings. The later/replacement coolant pipes had larger 3.5 mm groove which require the 2.8 mm (black) O-rings.
Special tool 3371 can be used to measure the thickness of the O-ring groove to determine the correct O-ring
fitment. Replacing the coolant pipes is not allowed!
For the replacement of the two O-rings for the coolant supply pipes we recommend the following pipe position to
allow access to remove and replace the O-rings (Figure 2).

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© 2017 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Figure 2. Recommended pipe position.
1. Clean the intake ports for the coolant pipes on the top of the turbochargers, the ports should be clean and dry
before installing the coolant pipes with the O-rings. The new O-rings are coated with a lubricating agent and
should be installed dry.
2. Replace the oil feed pipe O-rings. Coat lightly with clean engine oil, do not allow engine oil to touch the coolant
O-rings.
3. Install the pipe retaining plate and secure loosely, attach pipe retainer brackets and torque retaining plate bolts
to 9 nm and reassemble intake pipes and hoses.
4. Fill the new coolant additive in the cooling system according to manufacturer guidelines. Observe the mixture
ratio and filling-up procedure.
5. Only mix distilled water with coolant additives. Distilled water provides optimum corrosion protection.

Page 4 of 9
© 2017 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

6. The filling procedure outlined in ElsaPro must be followed. It is important that the vacuum-down, filling and
bleeding processes for the specific vehicle being repaired are used.
7. New software in the engine control module, J623 (address word 0001) addressed the condition.
8. Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
9. Update the engine control module, J623 (address word 0001) using the SVM action code as listed in the table
below if necessary:

Model

Engine Old Software
Part Number

Old Software New Software Part New Software SVM Code Input
Version
Number
Version
(or lower)

S6/S6 MY13 4.0TFSI

(or higher)

4G0906014B

0008

4G0906014B

0009

01A225

S6/S6 MY13

CEUC

4G0906014

0011

4G0906014

0012

01A225

S6/S6 MY13

CEUC

4G0906014A

0007

4G0906014A

0008

01A225

S6/S6 MY14 4.0TFSI

4G0906014E

0005

4G0906014E

0006

01A225

S6/S6 MY15 4.0TFSI

4G0906014E

0005

4G0906014E

0006

01A225

S6/S6 MY16 4.0TFSI

4G0906014C

0005

4G0906014C

0006

01A225

S6/S6 MY16 4.0TFSI

4G0906014D

0001

4G0906014D

0002

01A225

RS 7 MY14

4.0TFSI

4G0906560A

0005

4G0906560A

0006

01A225

RS 7 MY14

4.0TFSI

4G0906560

0011

4G0906560

0012

01A225

RS 7 MY14

4.0TFSI

4G0906560B

0007

4G0906560B

0008

01A225

RS 7 MY154.0TFSI
16

4G0906560F

0002

4G0906560F

0003

01A225

RS 7 MY16
4.0TFSI
Performance

4G0906560G

0001

4G0906560G

0002

01A225

A8 4.0TFSI
MY13-14

4.0TFSI

4H0906014

0007

4H0906014

0008

01A225

A8 4.0TFSI
MY13-14

4.0TFSI

4H0906014A

0005

4H0906014A

0006

01A225

Page 5 of 9
© 2017 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

A8 4.0TFSI
MY13-14