Detroit Diesel Series 50, Series 60 Non-EGR Head Bolt, 23530768

Cylinder Head Bolt (M16 x 2 x 175)
Use 26 for Series 50 engines
Use 38 for Series 60 engines
Please note: For 50 Series Engines produced after after September 2002, a new cylinder head gasket (Part #23531306) and cylinder head bolt (Part #23530768) have been released to improve clamping load of the cylinder head. The head gasket has a revised compression seal designed to work with the increased clamping load of the new head bolt. The higher revised torque on the head bolt is 220 FT/LBS (298 Nm). 
The new cylinder head gasket must be used with the new cylinder head bolts. There is no change to the procedure other than the new torque value. The new cylinder head bolts can be used with the older head gasket, however, the new head gasket cannot be used with the former head bolts. Former and new head bolts must not be mixed.

OEM Cross References: 23530768, 8929123, 23530768