Cylinder Head Gasket - Volvo EPA2007 D13F Reference Manual

82 ENGINE COMPONENT AND LOCATION

Cylinder Head Gasket

T2018766
The cylinder head gasket is made of one piece of sheet steel with vulcanized elastomer
seals on oil and coolant conduits. The design of the engine and head gasket requires a
unique procedure for installation of the cylinder head.
The screws and washers at the side guide the head into side-to-side alignment as it is
laid on the gasket and block. Screws passed through the timing gear plate into the
head pull the head into alignment fore and aft. Small, stamped bosses on the gasket
hold the head clear of the seals and allow it to glide accurately into position against the
plate during installation. Tightening the head bolts flattens the bosses on the gasket.
For this reason, a new head gasket must be installed whenever the head is removed.