TM 5-2420-230-24-2
Cylinder Head - Group 2
General Information
B Series Shop Manual
Page 2-5
General Information
The cylinder head is a one piece, crossflow design with two valves per cylinder. The cylinder head features
integrally cast valve guides, induction hardened seat surfaces, integral intake manifold, fuel filter head, and
thermostat housing. On high horsepower automotive six cylinder engines equipped with in-line injection pumps,
the fuel filter head is eliminated to allow for adequate injection pump clearance. The fuel filter head bracket is
relocated to allow for adequate injection pump clearance. The injectors are mounted in the cylinder head for direct
injection into the cylinders.
The cylinder head gasket is a composite design with a fire ring to seal the cylinder bores. Orifices in the gasket
control coolant flow.
The valve seats can be re-ground once. Valve seats that have been previously re-ground can be replaced with
service valve seats. Service valve guides are also available to replace worn guides. Refer to the Alternative Repair
Manual, Bulletin No. 3810234, for seat and guide replacement procedures.
L-268