A1921182061604_4
Service Bulletin Details
Public Details for: A1921182061604_4
This bulletin contains instructions for resolving a coolant leak.
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19 Coolant leak in area of coolant thermostat housing/coolant pump - 2.0TFSI 19 21 18 2061604/4 May 28, 2021. Supersedes Technical Service Bulletin Group 19 number 21-15 dated April 1, 2021 for reasons listed below. Model(s) Year VIN Range Vehicle-Specific Equipment A3 2007 - 2013 All Evo2 A4 2007 - 2016 All Evo2 A5 2010 - 2016 All Evo2 A6 2012 -2015 All Evo2 A8 2013 All Evo2 Q3 2012 - 2018 All Evo2 Q5 2011 - 2017 All Evo2 TT 2009 - 2014 All Evo2 Condition REVISION HISTORY Revision Date Purpose 4 - Revised Service (Updated Warranty Policy reference) 3 04/01/2021 Revised Warranty (Updated Labor Operation) 2 03/08/2021 Revised Warranty (Updated Labor Operation and condensed table) Customer state: The coolant temperature warning light is on. There are clear coolant marks under the front end/engine compartment. Workshop findings: The leak can be reproduced. The cause for the coolant loss is found around the coolant thermostat housing or the coolant pump. Page 1 of 6 © 2021 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 Coolant loss from the coolant thermostat housing (Figure 1, position 1) or the coolant pump (Figure 1, position 2). Figure 1. Coolant thermostat/coolant pump. Parts are available separately, see parts table below. Production Solution Not applicable. Service Note: Refer to Warranty Policy and Procedures section 3.21.9. Please take photos of the leak and attach to the repair order. Photos should: Have a date stamp and VIN reference. Be taken in focus and with sufficient light. Check the cooling system for leaks according to the repair manual (pressure check). Only replace the leaking component (coolant pump or coolant thermostat housing). Proceed as follows: 1) Remove the coolant thermostat housing including the coolant pump according to Elsa at repair manual: Engine >> 4 - Cylinder Direct Injection >> 19 Cooling System >> Coolant Pump/Coolant Thermostat >> Coolant Pump, Removing and Installing. Page 2 of 6 © 2021 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. 2) Separate the water pump and coolant thermostat housing by removing the five connecting bolts (Figures 1 - 2). 3) Replacing the leaking component (coolant thermostat housing or coolant pump) with a replacement part, proceed as follows: Assemble the coolant thermostat housing and the coolant pump and attach the five connecting bolts. Align the two components against one another in such a way that both components are flush to one another in the areas marked in red (Figure 2). The thermostat housing must not be higher/lower than the coolant pump (run your finger over the three areas to check). Torque the connecting bolts of the two components to 10 Nm. Figure 2. Securing bolts of the coolant pump (1 to 5). 4) Install the assembled coolant module to the engine. Make sure the bolts are only hand-tight at this point. Page 3 of 6 © 2021 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. 5) Check the toothed belt tension (Figure 3) by pressing the toothed belt together centrally between the two toothed belt sprockets. The measured distance of the backs of the toothed belt should be between 28mm and 30mm. A measuring caliper can also be used for toothed belt compression and measurement. Figure 3. Checking the toothed belt tension. The measured distance is between 28mm and 30mm: 6. Complete the installation of the coolant module according to the instructions in the Elsa repair manual (Step 7 is not necessary). The measured distance is smaller than 28mm and greater than 30mm: 7) Adjustment of the toothed belt tension is necessary. Proceed as follows using Figure 4 for reference: Note down the measured value (e.g. 26mm) from step 5). Remove the cooling module from the engine again, loosen the coolant pump bolts (Figure 2) and make adjustments as outlined below. If the measured distance of the backs of the toothed belt (pressed together) is less than 28mm (e.g. 25mm), then the belt tension is too low. A slight adjustment away from the balance shaft is necessary (direction "a"). If the distance of the backs of the toothed belt (pressed together) is greater than Figure 4. Adjusting the toothed belt tension. Page 4 of 6 © 2021 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. 28mm (e.g. 32 mm), then the belt tension is too great. A slight adjustment towards the balance shaft is necessary (direction "b"). 8. Tighten the five securing bolts of the coolant pump and repeat steps 4 and 5. Warranty Claim Type: 110 up to 48 Months/50,000 Miles. G10 for CPO Covered Vehicles – Verify Owner. If the vehicle is outside any warranty, this Technical Service Bulletin is informational only. Service Number: 1950 (Coolant Pump). 1955 (Thermostat Housing). Damage Code: 0050 Labor Operations: Remove and install the coolant pump 1950 1913 See SRT with associated operations Remove and install the coolant pump 1950 1937 (A3 Only) See SRT with associated operations Replace water pump and check/adjust tooth belt tension 1950 5599 20 TU Replace thermostat housing and check/adjust tooth belt tension 1955 1999 20 TU GFF No allowance 0 TU Road test prior to the service procedure No allowance 0 TU Road test after the service procedure No allowance 0 TU Diagnostic Time: Claim Comment: As per TSB #2061604/4 All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty. Page 5 of 6 © 2021 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. Required Parts and Tools Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Part Number Part Description Quantity See ETKA Fasteners, Bolts, Nuts, Screws, and additional gaskets as needed per the Repair Manual See ETKA/ELSA 06H121010A Water Pump (only if leaking) 01 06H121111R Thermostat Housing (only if leaking) 01 06H121043 Gasket 01 Additional Information More information on this system can be found in the following resources: Warranty Online: Warranty Policy and Procedures section 3.21.9. Elsa: Engine >> 4 - Cylinder Direct Injection >> 19 Cooling System >> Coolant Pump/Coolant Thermostat >> Coolant Pump, Removing and Installing. All parts and service references provided in this TSB (2061604) are subject to change and/or removal. ©2021 Audi of America, Inc. All rights reserved. The 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. Page 6 of 6 © 2021 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.