Specifications

Diameter — intake

0.472 in (12 mm)

Diameter — exhaust

0.472 in (12 mm)

Clearance-to-bore

0.0007–0.0020 in (.018–.05 mm)

Hydraulic leakdown rate — intake

0.45-3 seconds a

Hydraulic leakdown rate — exhaust

0.45-3 seconds a

Collapsed lash adjuster gap

0.0138–0.0335 in (.35–.85 mm)

Lobe lift - intake

0.2348 in (5.963 mm)

Lobe lift - exhaust

0.2161 in (5.488 mm)

Journal diameter

1.1268 in (28.62 mm)

Journal bore inside diameter

1.1292–1.1282 in (28.682–28.657 mm)

Journal-to-bearing clearance

0.0010–0.0030 in (.025–.075 mm)

Runout

0.0016 in (.04 mm)

End play

0.0059 in (.15 mm)

Cylinder bore diameter

3.6299–3.6307 in (92.2–92.22 mm)

Cylinder bore maximum taper

0.0005 in (.013 mm)

Cylinder bore maximum out-of-round

0.0004 in (.01 mm)

Main bearing bore inside diameter

2.850–2.851 in (72.4–72.424 mm)

Head gasket surface flatness

0.0254 mm (0.001 in) across any 38.1 mm (1.5 in) square

Main bearing journal diameter

2.657–2.658 in (67.481–67.505 mm)

Main bearing journal maximum taper

0.0002 in (.004 mm)

Main bearing journal maximum out-of-round

0.0002 in (.006 mm)

Main bearing journal-to-main bearing clearance

0.0010–0.0018 in (.025–.045 mm)

Connecting rod journal diameter

2.086–2.087 in (52.983–53.003 mm)

Connecting rod journal maximum taper

0.0002 in (.004 mm)