Valve Guides

Valve Movement

Measure the guide-to-stem clearance with a dial indicator while rocking the stem in the direction of normal thrust (wobble method).

Intake Valve Stem-to-Guide Clearance: Standard (New): 0.04 - 0.10 mm

(0.002 - 0.004 in) Service Limit:   0.16 mm (0.006 in)

Exhaust Valve Stem-to-Guide Clearance: Standard (New): 0.10 - 0.16 mm

(0.004 - 0.006 in) Service Limit:   0.22 mm (0.009 in)

NOTE: An alternate method of checking guide to stem clearance is to subtract the O.D. of the valve stem, measured with a micrometer, from the I.D. of the valve guide, measured with an inside micrometer or ball gauge. Take the measurements in three places along the valve stem and three places inside the valve guide. The difference between the largest guide measurement and the smallest stem measurement should not exceed the service limit.

Intake Valve Stem-to-Guide Clearance: Standard (Newt: 0.02 - 0.05 mm (0.001 - 0.002 in) Service Limit:   0.08 mm (0.003 in)

Exhaust Valve Stem-to-Guide Clearance: Standard (New): 0.05 - 0.08 mm (0.002 - 0.003 in) Service Limit:   0.11 mm (0.004 in)

Cylinder Head

Warpage

NOTE: If the camshaft-to-holder oil clearances (see page 6-45) are not within specification, the cylinder head cannot be resurfaced.

If the camshaft-to-holder oil clearances are within specifications, check the cylinder head for warpage.

Measure along edges, and 3 ways across center.

Cylinder Head Height:

D16Y2, D15Z3 engines:

Standard (New): 92.95 - 93.05 mm (3.659 - 3.663 in) D16Y3, D14A2 engines:

Standard (New): 9.4.95 - 95.05 mm (3.738 - 3.742 in)