Using a precision straightedge and feeler gauge, check the surfaces which contact the cylinder block sub-assembly and manifolds for warpage.

2.677,0.656 2.99,0.813 0.313,0.156 10 *a 4.927,0.313 5.24,0.469 0.313,0.156 10 *b 5.021,1.5 5.333,1.656 0.313,0.156 10 *c

*a	Cylinder Block Sub-assembly Side	*b	Intake Manifold Side
*c	Exhaust Manifold Side	-	-

Maximum Warpage:

Item	Specified Condition
Cylinder block sub-assembly side	0.05 mm (0.00197 in.)
Intake manifold side	0.10 mm (0.00394 in.)
Exhaust manifold side	0.10 mm (0.00394 in.)

If the warpage is greater than the maximum, replace the cylinder head sub-assembly.

Using a dye penetrant, check the intake ports, exhaust ports and cylinder head surface for cracks.

If cracked, replace the cylinder head sub-assembly.

2.876,1.227 3.08,1.383 0.204,0.156 10 *a

*a

Width

Apply a light coat of Prussian blue to the valve face.

Using a dial indicator, measure the thrust clearance while moving the camshaft back and forth.

Standard Thrust Clearance:

Item	Specified Condition
Intake	0.06 to 0.155 mm (0.00236 to 0.00610 in.)
Exhaust	0.06 to 0.155 mm (0.00236 to 0.00610 in.)

Maximum Thrust Clearance:

Item	Specified Condition
Intake	0.17 mm (0.00669 in.)
Exhaust	0.17 mm (0.00669 in.)

If the thrust clearance is greater than the maximum, replace the camshaft housing sub-assembly. If the thrust surface is damaged, replace the camshaft.

0.948,0.177 1.063,0.177 1.063,0.177 1.781,1.01 false 0.74,0.094 0.906,0.271 0.167,0.177 10 *a

*a	Plastigage

Lay a strip of Plastigage across each camshaft journal.

0.906,0.198 1.052,0.198 1.052,0.198 1.875,1.021 false 0.719,0.125 0.885,0.313 0.167,0.188 10 *a

*a	Plastigage

Measure the Plastigage at its widest point.

Standard Oil Clearance:

Item	Specified Condition
Camshaft No. 1 journal	0.030 to 0.063 mm (0.00118 to 0.00248 in.)
Camshaft other journals	0.035 to 0.072 mm (0.00138 to 0.00283 in.)

Maximum Oil Clearance:

Item	Specified Condition
Camshaft No. 1 journal	0.085 mm (0.00335 in.)
Camshaft other journals	0.09 mm (0.00354 in.)

NOTICE:

Completely remove the Plastigage after the inspection.

If the oil clearance is greater than the maximum, replace the camshaft. If necessary, replace the camshaft housing sub-assembly.

Type A:

i.

Using a vernier caliper, measure the free length of the inner compression spring.

Standard free length:

53.88 mm (2.12 in.)

If the free length is not as specified, replace the inner compression spring.

ii.

1.729,0.104 1.927,0.281 0.198,0.177 10 *a

*a

Deviation

Using a steel square, measure the deviation of the inner compression spring.

Maximum deviation:

1.0 mm (0.0394 in.)

If the deviation is more than the maximum, replace the inner compression spring.

Type B:

i.

Using a vernier caliper, measure the free length of the inner compression spring.

Standard free length:

51.88 mm (2.042 in.) or 51.90 mm (2.043 in.)

If the free length is not as specified, replace the inner compression spring.

ii.

1.448,0.396 1.76,0.552 0.313,0.156 10 false *a 0.042,1.406 1.24,1.646 1.198,0.24 10 false 37.5 mm (1.48 in.)

*a

Deviation

Using a steel square, measure the deviation of the inner compression spring.

Maximum deviation:

1.3 mm (0.0512 in.)

If the deviation is more than the maximum, replace the inner compression spring.

1.884,1.028 2.055,1.173 0.17,0.145 10 *a

*a	Overall Length

Using a vernier caliper, measure the overall length of the intake valve.

Standard Overall Length:

109.34 mm (4.30 in.)

Minimum Overall Length:

108.84 mm (4.29 in.)

If the overall length is less than the minimum, replace the intake valve.

Using a micrometer, measure the diameter of the intake valve stem.

Standard Valve Stem Diameter:

5.470 to 5.485 mm (0.2154 to 0.2159 in.)

If the intake valve stem diameter is not as specified, check the intake valve guide bush oil clearance.

0.406,1.771 0.729,1.948 0.323,0.177 10 *a

*a	Margin Thickness

Using a vernier caliper, measure the intake valve head margin thickness.

Standard Margin Thickness:

1.0 mm (0.0394 in.)

Minimum Margin Thickness:

0.5 mm (0.0197 in.)

If the margin thickness is less than the minimum, replace the intake valve.

1.932,0.968 2.107,1.134 0.175,0.166 10 *a

*a	Overall Length

Using a vernier caliper, measure the overall length of the exhaust valve.

Standard Overall Length:

108.25 mm (4.26 in.)

Minimum Overall Length:

107.75 mm (4.24 in.)

If the overall length is less than the minimum, replace the exhaust valve.

Using a micrometer, measure the diameter of the exhaust valve stem.

Standard Valve Stem Diameter:

5.465 to 5.480 mm (0.2152 to 0.2157 in.)

If the exhaust valve stem diameter is not as specified, check the exhaust valve guide bush oil clearance.

0.417,1.854 0.573,2.021 0.156,0.167 10 *a

*a	Margin Thickness

Using a vernier caliper, measure the exhaust valve head margin thickness.

Standard Margin Thickness:

1.01 mm (0.0398 in.)

Minimum Margin Thickness:

0.5 mm (0.0197 in.)

If the margin thickness is less than the minimum, replace the exhaust valve.

Using a caliper gauge, measure the inside diameter of the valve guide bush.

Standard Valve Guide Bush Inside Diameter:

5.510 to 5.530 mm (0.2169 to 0.2177 in.)