Campaign - Timing Chain Tensioner Check Valve Removal
Campaign No. 2013010001February 2013
TO: ALL MERCEDES-BENZ CENTERS
SUBJECT:
Model 207, 212, 218, 221, 231 with Engine M278, Model Year 2013
Remove Check Valve for Left and Right Secondary Chain Tensioners
This Service Campaign has been initiated because Daimler AG (DAG) has determined that the check valve of the left and right secondary chain tensioners installed at the factory may have been pressed too deep into the cylinder heads. As a result oil supply into the cylinder head cannot be ensured. An authorized Mercedes-Benz dealer will remove the check valve of the left and right side secondary chain tensioners at the next workshop service.
Prior to performing this Service Campaign:
^ Please check VMI to determine if the vehicle is involved in the Campaign and if it has been previously repaired.
^ Please review the entire Service Campaign bulletin and follow the repair procedure exactly as described.
Please note that Recall and Service Campaigns do not expire and may also be performed on a vehicle with a vehicle status indicator.
Approximately 167 vehicles are affected.
Procedure
A. Remove Left and Right Secondary Chain Tensioner
Note:
Do not remove chain tensioners at the same time. After removal of the first chain tensioner, remove the corresponding check valve, reinstall the chain tensioner and continue with the second chain tensioner.
Note: (regarding below WIS instructions)
^ Drain coolant at radiator only, do not drain coolant from engine block.
^ Using a Torx 40 bit X 72 mm (locally sourced tool, see special tools section) will allow for easier access to lower oil filter housing bolts.
1. For models 207, 212, 218 refer to WIS: AR05.10-P-7800ELB.
2. For models 216, 221 refer to WIS: AR05.10-P-7800MMB.
3. For model 231 refer to WIS: AR05.10-P-7800RKB and additional information below:
CAUTION!
Refer to safety precautions located in WIS: AS20.00-Z-0001-01A, AS00.00-Z-0010-01 A, AH20.00-N-2080-01A.
^ Remove/install charge air ducts (refer to attached WIS document).
^ Remove lower engine compartment panels, refer to WIS: AR61.020-P-11 05RK.
^ Drain coolant from radiator (arrow, Figure 1).
^ Refill cooling system and bleed (after performing subject B), refer WIS: AR20.00-P-1142-04A Check cooling system for leaks (after performing subject B), refer to WIS document.
B. Remove Check Valve from Cylinder Head
1. Set puller W 605 589 00 33 00 with washers and an M6 nut to a remaining length of approx. 4 mm (Figure 2).
2. Remove check valve (A, Figure 3) with set puller (B) W 605 589 00 33 00 from cylinder head.
Note:
Cover chain case opening with rag so no parts can fall in.
4. Assemble in the reverse order.
Note:
Be sure to refill cooling system, bleed system, and check for leaks.
Special Tools
Note:
^ Please be aware that only the part number(s) referenced in the Campaign Bulletin is/are approved for use to repair the vehicle. Repairs performed using any other part(s) will not have been performed in accordance with the campaign. Accordingly, warranty claims submitted with reference to an improper part number(s) will be denied.
^ The following allowable labor operation should be used when submitting a warranty claim for this repair:
Warranty Information
Operation: Remove check valve for secondary drive chain tensioner (02-7954).