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Home >> Mercedes Benz >> 2008 >> GL320 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Engine Timing - 164 Chassis) >> Testing & Repair >> Remove/install chain tensioner - AR05.10-P-7800 >> Remove/install chain tensioner, with thread M24 X 1.5 - AR05.10-P-7800GZA (ML350) >> Installing chain tensioner - AR05.10-P-7800-02VA

Installing chain tensioner - AR05.10-P-7800-02VA

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Modification notes

8.2.05 Chain tensioner housing in timing case cover Engine 272 *BA05.10-P-1002-01B 
Timing chain, chain tensioner

Number Designation Engine 272
BA05.10-P-1001-01B End piece of chain tensioner Nm 50
BA05.10-P-1002-01B Chain tensioner housing in timing case cover Nm 70
Timing chain, chain tensioner

Number Designation Engines 275, 285
BA05.10-P-1002-01H End piece of chain tensioner Nm 80
BA05.10-P-1003-01H Chain tensioner housing in timing case cover Nm 120
  1. Press out the bolt (8) and detent spring (9) from chain tensioner housing (5) (arrowed).
    Fig 1: Identifying Detent Spring, Bolt And Chain Tensioner Housing
    G04731867Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  2. Insert the bolt (8) and detent spring (9) in chain tensioner housing (5) (arrowed).

    IMPORTANT Insert the bolt (8) and detent spring (9) so that the detent springs (9) sit in the first notch (10).

    The bolt (8) must remain in this position.

    Fig 2: Identifying Chain Tensioner Housing, Bolt, Detent Spring & First Notch
    G04731868Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  3. Screw in the chain tensioner housing (5) with bolt (8), detent spring (9) and new sealing ring (7) into the timing case cover, and tighten TORQUE SPECIFICATION .
    Fig 3: Identifying Chain Tensioner Housing With Bolt & New Sealing Ring
    G04731869Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  4. Insert the push spring (3) and filler pin (4) in chain tensioner housing (5).
  5. Screw in the end piece (1) with new sealing ring (2) into chain tensioner housing (5), and tighten TORQUE SPECIFICATION .

    IMPORTANT When the push spring (3), filler pin (4) and end piece (1) are installed, bolt (8) is moved into the correct position in chain tensioner housing (5).

    Fig 4: Identifying Push Spring, Filler Pin, Chain Tensioner Housing, End Piece & New Sealing Ring
    G04731871Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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