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Check cylinder head bolts - AR01.30-P-5800-03T

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ENGINE 646 in MODEL 203, 209 

ENGINE 646.8 in MODEL 211 

ENGINE 646.951 in MODEL 211.004 

ENGINE 646.961 in MODEL 211.006/206/606 

ENGINE 647.961 in MODEL 211.016/216/616 

ENGINE 648 in MODEL 220 

ENGINE 648.961 in MODEL 211.023/026/223/226 

ENGINE 651 in MODEL 117, 156, 166, 172, 176, 204, 205, 207, 212, 218, 221, 222, 246, 253 

CYLINDER HEAD/CYLINDER HEAD BOLTS

Number Designation Engine 646.9, 647.961, 648 Engine 646.8
BE01.30-P-1001-04A Cylinder head bolt Thread diameter M 12 12
Length (L) when new mm 102 102
Max. length (L) mm 104 104
For picture, see AR01.30-P-5800-03T  AR01.30-P-5800-03T 
CYLINDER HEAD/CYLINDER HEAD BOLTS

Number Designation Engine 651
BE01.30-P-1001-04H Cylinder head bolt Thread diameter M 12
Length (L) when new mm 226 (±0, 5)
Max. length (L) mm 227, 5
For picture, see  
  1. Measure length (L).

    If the length (L) is greater than the maximum permissible dimension.

    Use new cylinder head bolts.

    Fig 1: Measuring Cylinder Head Bolts Length
    G10240524Courtesy of MERCEDES-BENZ USA