K56409120
Service Bulletin Details
Public Details for: K56409120
Turbo compound (tc) hot side noise diagnostic information
- 9999 - 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 - 2013 -
Models from 9999
| 9999 VOLVO VAH |
| 9999 VOLVO VHD |
| 9999 VOLVO VNL |
| 9999 VOLVO VNR |
Models from 2020
| 2020 VOLVO VNX |
Models from 2019
| 2019 VOLVO VNX |
Models from 2018
| 2018 VOLVO VNX |
Models from 2017
| 2017 VOLVO VNX |
Models from 2016
| 2016 VOLVO VNX |
Models from 2015
| 2015 VOLVO VNX |
Models from 2014
| 2014 VOLVO VNX |
Models from 2013
| 2013 VOLVO VNX |
5/28/2020 Print Case Solution K56409120 Thursday, May 28, 2020 1:47:50 PM CEST ** SOLUTION ** Title Turbo Compound (TC) Hot Side Noise Diagnostic Information Mack Models Mack Model AN - Anthem , GR - Granite , PI - Pinnacle Volvo Models Volvo Model VN , VNL , VNR , VNX , VAH , VHD Emission Standard Emission Standard US17+OBD16 , US17+OBD18 , US17+OBD19 Engine family Engine family 13L Engine , MP8 ** SOLUTION ** Cause Information to use when diagnosing a report of noise from the hot side of the turbocharger on turbo-compound engines. Solution Information 3 typical turbo compound hot side noises: 1. Bearing spin down (Snap Throttle then Key Off ) • This is normal for fixed geometry turbos on TC engines. No diagnostics is necessary. 2. Closed loop butterfly (CLB) application noise from gaskets or CLB itself (During warm hold or Engine braking) • Smoke test exhaust for any leaks around the CLB pipe section 3. Fluttering/Exhaust leak under load • Visual inspection of the exhaust system for soot tracking. ( A mirror is necessary ) • Smoke test for leaks if no soot tracking found. Diagnosis IMPORTANT Contact Tech Support via eService before removing major components. NOTE Soapy water is not recommended for hot side leak detection. If no soot tracking or leaks from smoke machine are found: 1. Unplug the EGR valve. If the noise goes away or gets quieter: Focus on the If the noise gets louder or worse: Focus on the EGR Hot pipe. manifold. https://secure4.volvo.com/cbr/printCase.action?caseId=368564 1/2 5/28/2020 Print Case Flange weld at EGR cooler inlet Cracks in Manifold or warped face causing leaks at gasket 2. Perform a Soot Regen. If the noise gets louder or worse: Focus on the diffuser pipe (between TC unit and turbo) Function Group Function Group 255 turbocharger Customer effect Main customer effect noise Administration Author A257217 Dealer ID A257217 Last modified by RU4469V Creation date 15-04-2020 17:04 Date of last update 18-05-2020 17:05 Status Published UNCONTROLLED COPY. Printed document is for temporary use only and should not be retained. https://secure4.volvo.com/cbr/printCase.action?caseId=368564 2/2