Cylinder Head

NOTE: Scratches and corrosion on the cylinder head gasket surface area should only be machined on a flat cylinder head.

CYLINDER HEAD

Application

Specification

Cylinder Head Height

5.076-5.080" (128.95-129.05 mm)

Maximum Warpage ⁽¹⁾

Length

.020" (.50 mm)

Width

.008" (.20 mm)

Maximum Machining

.012" (.30 mm)

Valve Seats ⁽²⁾

Intake Valve

Seat Angle - B

45°

Seat Width - a

.055-.070" (1.4-1.8 mm)

Lower Reduction Angle - C

60°

Upper Reduction Angle - A

1999

15°

2000

20°

Exhaust Valve

Seat Angle - B

45°

Seat Width - a

.070-.086" (1.8-2.2 mm)

Lower Reduction Angle - C

60°

Upper Reduction Angle - A

15°

Valve Guides

Valve Stem-To-Guide Oil Clearance

Standard

.001-.002" (.03-.06 mm)

Maximum

.0059" (.15 mm)

⁽¹⁾	See Fig 1 for checking cylinder head warpage.

⁽²⁾	See Fig 2 for identification of seat angles and surfaces.

Fig 1: Measuring Cylinder Head Warpage

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Valve Seat Surfaces

Courtesy of VOLVO CARS OF NORTH AMERICA.