Cylinder head changed - BT01.30-P-0004-01MM
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ENGINE 157, 276, 278
ENGINE 157
Cylinder head without stepped hole
Courtesy of MERCEDES-BENZ USA
Cylinder head with stepped hole
Courtesy of MERCEDES-BENZ USA
For optimization of the oil circuit a check valve has been retrofitted for the chain tensioner in the oil supply duct in the cylinder head. The oil supply duct for the chain tensioner was also adapted as part of this measure so that there are now vehicles with and without a stepped hole in the cylinder head. The check valve for the chain tensioner must be installed in the cylinder head when replacing the cylinder head.