LI05.10-P-056435
Service Bulletin Details
Public Details for: LI05.10-P-056435
Engine rattling noise after engine start for several seconds
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Rattling noise after engine start for several seconds Topic number LI05.10-P-056435 Version 2 Design group 05.10 Timing chain drive, toothed belt drive Date 03-21-2014 Validity Engine 276, engine 278, engine 157 as follows: Engine 157: Up to engine 1579xx 60 022333 Engine 2768: Up to engine 2768xx 30 001280 Engine 2769: Up to engine 2769xx 30 406603 Engine 278: Up to engine 2789xx 30 103675 Reason for change Validity included in the topic section Reason for block Complaint: Engine rattling noise after engine start for several seconds Attachments File Designation Rasselgeräusch nach Motorstart.mp3 Rattling noise after engine start Cause: Secondary timing chains might produce a rattling sound during engine start up until the engine oil pressure builds up. Once there is sufficient oil pressure created in secondary chain tensioners, they provide operating tensions to timing chains and the rattling stops. No consequential damage is to be expected. Remedy: Install non-return valves (check valves) and replace left and right secondary chain tensioners as required. Install check valves by inserting them into the tensioner oil supply opening in the left and the right cylinder head. Correctly installed check valves and optimized secondary chain tensioners will minimize oil drainage from tensioners. Order chain tensioners and check valves directly from parts with part numbers listed. Refer to the applicable engine number to install correct version of the secondary chain tensioner. Note: Verify correct number or a sub through EPC as the secondary chain tensioners might be updated and part numbers could change. Install check valves based on information provided in this document and measurements of the oil supply opening diameter in cylinder heads. Refer to the attachments for instructions on how to measure the oil supply opening and how to install check valves. Note: Check valve installation special tool W276 589 00 33 00 Engine 157: 1) From engine number 157 9xx 60 009368 up to engine number 157 9xx 60 017984 install check valves and chain tensioners 2) From engine number 157 9xx 60 017985 up to engine number 157 9xx 60 022333 (December 2012) install check valves (optimized tensioners installed in this production range) Engine 2768: 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 1/6 1) Up to engine number 276 8xx 30 000790 install check valves and chain tensioners 2) From engine number 276 8xx 30 000791 up to engine number 276 8xx 30 001280 install check valves only Engine 2769: 1) Up to engine number 276 9xx 30 365996 install check valves and chain tensioners 2) From engine number 276 9xx 30 365997 up to engine number 276 9xx 30 406603 (February 2013) install check valves only (optimized tensioners installed in this production range) Engine 278: 1) Up to engine number 278 9xx 30 073273 install check valves and chain tensioners 2) From engine number 278 9xx 30 073274 up to engine number 278 9xx 30 103675 (February 2013) install check valves only (optimized tensioners installed in this production range) Note: When performing repairs and only the check valves are supposed to be installed, the tensioners must still be checked according to WIS documentation. If optimized tensioner is found to be defective it must be replaced Note: Check valves were installed in the factory in the engines above the ranges provided above. In case of 157 engines either A 278 050 40 00 or A 278 050 33 00 check valves were installed. In engines 276 and 278 check valves A 278 050 33 00 were installed. It is important to measure the oil supply opening in cylinder heads to install correct check valve. Note: If the noise is still present after installation of check valves and correct tensioners or the engine is outside of the ranges provided, open a PTSS case and attach all information including the short test and sound file. The case will be forwarded to SE. Otherwise, claims might be rejected by Warranty. Note: The installation of check valves for the stated complaint in the "Complaint section" does not reverse what might have been accomplished with the Service Campaign 2013010001. There two different reasons for performing the work in the campaign and in this LI TIPS document. Attachments File Designation assembling of check valve.pdf Instructions for installing check valves and measuring the bore opening Symptoms Power generation / Engine noise / Knocking/clacking Power generation / Engine noise / Chattering Power generation / Engine noise / Clanking Power generation / Engine noise / Rattling Power generation / Engine noise / Clattering Power generation / Engine noise / Pounding Parts Part number ES1 ES2 Designation Quantity Note EPC Other make part A 276 050 25 00 M276 Left chain tensioner 1 Chain tensioner as of engine 276 9xx 30 129269 X A 276 050 26 00 M276 Right chain tensioner 1 Chain tensioner as of engine 276 9xx 30 129269 X A 278 050 40 00 Non-return valve (check valve) 2 Smaller oil supply bore - Refer to notes in Remedy X 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 2/6 A 278 050 15 00 M157 M278 left chain tensioner 1 Secondary chain tensioner from engine 278 9xx 30 035186 respectively 157 9xx 60 009367 X A 278 050 16 00 M157 M278 right chain tensio- 1 ner Secondary chain tensioner from engine 278 9xx 30 035186 respectively 157 9xx 60 009367 X A 278 050 33 00 Non-return valve (check valve) 2 Installed in factory. Only for cylinder heads with staged bore larger outside diameter (8 mm) X A 276 050 23 00 M276 Left chain tensioner 1 Chain tensioner up to engine 276 9xx 30 129268 X A 276 050 24 00 M276 Right chain tensioner 1 Chain tensioner up to engine 276 9xx 30 129268 X A 278 050 13 00 M157 M278 left chain tensioner 1 Secondary chain tensioner up to engine 278 9xx 30 035185 respectively 157 9xx 60 009366 X A 278 050 14 00 M157 M278 right chain tensio- 1 ner Secondary chain tensioner up to engine 278 9xx 30 035185 respectively 157 9xx 60 009366 X Validity Vehicle Engine Transmission * 276.958 * * 276.955 * * 276.956 * * 276.954 * * 276.957 * * 276.950 * * 276.952 * * 278.922 * * 278.920 * * 278.928 * * 278.932 * * 278.927 * * 157 * Vehicle Engine Transmission 166.055 276.955 722.906 166.057 276.955 722.906 Full model designation breakdown 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 3/6 166.058 276.955 722.906 166.073 278.928 722.909 166.073 278.928 725.031 166.073 278.928 725.032 166.074 157.982 722.905 166.074 157.982 722.931 166.872 278.928 722.909 166.872 278.928 725.031 166.872 278.928 725.032 166.872 278.928 725.033 166.873 278.928 722.909 166.873 278.928 725.031 166.873 278.928 725.032 166.873 278.928 725.033 166.874 157.982 722.905 166.874 157.982 722.931 172.457 276.956 722.906 204.055 276.957 722.906 204.057 276.957 722.906 204.080 276.957 722.960 204.088 276.957 722.960 204.257 276.957 722.906 204.357 276.957 722.906 204.388 276.957 722.960 204.957 276.957 722.906 204.988 276.957 722.960 204.990 276.957 722.960 207.355 276.957 722.906 207.359 276.957 722.906 207.373 278.922 722.909 207.388 276.957 722.960 207.455 276.957 722.906 207.459 276.957 722.906 207.473 278.922 722.909 212.055 276.952 722.906 212.059 276.952 722.906 212.073 278.922 722.909 212.073 278.922 725.011 212.073 278.922 725.032 212.074 157.981 722.931 212.074 157.981 722.965 212.075 157.981 722.931 212.076 157.981 722.971 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 4/6 212.080 276.952 722.960 212.088 276.952 722.960 212.091 278.922 722.967 212.091 278.922 725.021 212.092 157.981 722.971 212.095 276.952 724.206 212.195 276.952 724.206 212.255 276.952 722.906 212.259 276.952 722.906 212.273 278.922 722.909 212.273 278.922 725.011 212.273 278.922 725.032 212.273 278.922 725.033 212.274 157.981 722.931 212.275 157.981 722.931 212.276 157.981 722.971 212.280 276.952 722.960 212.288 276.952 722.960 212.291 278.922 722.967 212.291 278.922 725.021 212.292 157.981 722.971 216.373 278.920 722.909 216.374 157.980 722.931 216.394 278.920 722.967 218.355 276.952 722.906 218.359 276.952 722.906 218.359 276.952 725.011 218.373 278.922 722.909 218.373 278.922 725.011 218.374 157.981 722.931 218.375 157.981 722.931 218.376 157.981 722.971 218.391 278.922 722.967 218.391 278.922 725.041 218.392 157.981 722.971 218.959 276.952 722.906 218.959 276.952 725.011 218.973 278.922 722.909 218.973 278.922 725.011 218.974 157.981 722.931 218.975 157.981 722.931 218.976 157.981 722.971 218.991 278.922 722.967 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 5/6 218.991 278.922 725.041 218.992 157.981 722.971 221.057 276.950 722.906 221.073 278.932 722.909 221.074 157.980 722.931 221.082 276.950 722.960 221.094 278.932 722.967 221.157 276.950 722.906 221.173 278.932 722.909 221.174 157.980 722.931 221.182 276.950 722.960 221.194 278.932 722.967 222.077 157.985 722.931 222.177 157.985 722.931 222.178 157.985 722.971 231.457 276.954 722.906 231.473 278.927 722.909 231.474 157.983 722.931 251.057 276.958 722.906 251.157 276.958 722.906 463.272 157.984 722.905 463.273 157.984 722.905 03-21-2014 4:47 PM © Copyright Daimler AG DOKONIE Page 6/6