Cylinder Block Inspection

Using a gasket scraper, remove all the gasket material from the top surface of the cylinder block.

Using a soft brush and solvent, thoroughly clean the cylinder block.

NOTICE:

If the cylinder is washed at high temperatures, the cylinder liner sticks out beyond the cylinder block. Always wash the cylinder block at a temperature of 45°C (113°F) or less.

Using a precision straightedge and feeler gauge, measure the warpage of the surfaces which contact the cylinder head gaskets.

Maximum warpage:

0.05 mm (0.00197 in.)

Visually check the cylinder for vertical scratches. If deep scratches are present, rebore all 6 cylinders.
If necessary, replace the cylinder block.

Using a cylinder gauge, measure the cylinder bore diameter at positions A and B in the thrust and axial directions.

Reference value (new parts):

94.000 to 94.012 mm (3.7008 to 3.7013 in.)

Maximum diameter:

94.132 mm (3.7060 in.)

Measurement position (A):

10 mm (0.394 in.)

Text in Illustration

*1	Axial Direction
*2	Thrust Direction
*3	Center
	Engine Front

Using a feeler gauge, measure the clearance between a new piston ring and the wall of the ring groove.

Standard Ring Groove Clearance:

Item	Specified Condition
No. 1 compression ring	0.02 to 0.07 mm (0.000787 to 0.00276 in.)
No. 2 compression ring	0.02 to 0.06 mm (0.000787 to 0.00236 in.)
Oil Ring	0.07 to 0.15 mm (0.00276 to 0.00590 in.)

Insert the piston ring into the cylinder bore.

Using a piston, push the piston ring a little beyond the bottom of the ring travel, 110 mm (4.33 in.) from the top of the cylinder block.

Using a feeler gauge, measure the end gap.

Standard End Gap:

Item	Specified Condition
No. 1 compression ring	0.22 to 0.32 mm (0.00866 to 0.0126 in.)
No. 2 compression ring	0.35 to 0.45 mm (0.0138 to 0.0177 in.)
Oil Ring (Side Rail)	0.10 to 0.40 mm (0.00394 to 0.0157 in.)

Maximum End Gap:

Item	Specified Condition
No. 1 compression ring	1.0 mm (0.0394 in.)
No. 2 compression ring	1.1 mm (0.0433 in.)
Oil Ring (Side Rail)	1.0 mm (0.0394 in.)

Clean the piston.

1. Using a gasket scraper, remove the carbon from the piston top.
   





2. Using a groove cleaning tool or broken ring, clean the piston ring grooves.
   

3. Using solvent and a brush, thoroughly clean the piston.
   

   NOTICE:

   Do not use a wire brush.

Using a micrometer, measure the piston diameter at a position that is 9.6 mm (0.378 in.) from the bottom of the piston (refer to the illustration).

Reference value (new parts):

93.961 to 93.991 mm (3.6992 to 3.7004 in.)

Subtract the piston diameter measurement from the cylinder bore diameter measurement.

Reference value (new parts):

0.009 to 0.051 mm (0.000354 to 0.00201 in.)

Maximum oil clearance:

0.110 mm (0.00433 in.)

Check each mark on the piston and connecting rod.

Using a caliper gauge, measure the inside diameter of the piston pin hole.

Standard Piston Pin Hole Inside Diameter:

Item	Specified Condition
Mark A	22.001 to 22.004 mm (0.86618 to 0.86630 in.)
Mark B	22.005 to 22.007 mm (0.86634 to 0.86642 in.)
Mark C	22.008 to 22.010 mm (0.86645 to 0.86653 in.)

Using a micrometer, measure the piston pin diameter.

Measurement Position:

Measurement Position	Piston Pin Position
a	28 mm (1.102 in.) from edge
b	5 mm (0.197 in.) from edge

Standard Piston Pin Diameter:

Item	Specified Condition
Mark A	21.997 to 22.000 mm (0.86602 to 0.86614 in.)
Mark B	22.001 to 22.003 mm (0.86618 to 0.86626 in.)
Mark C	22.004 to 22.006 mm (0.86630 to 0.86642 in.)

Using a caliper gauge, measure the inside diameter of the connecting rod bush.

Standard Bush Inside Diameter:

Item	Specified Condition
Mark A	22.005 to 22.008 mm (0.86634 to 0.86645 in.)
Mark B	22.009 to 22.011 mm (0.86649 to 0.86657 in.)
Mark C	22.012 to 22.014 mm (0.86661 to 0.86669 in.)

Subtract the piston pin diameter measurement from the piston pin hole diameter measurement.

Standard oil clearance:

0.001 to 0.007 mm (0.0000394 to 0.000276 in.)

Maximum oil clearance:

0.040 mm (0.00157 in.)

Subtract the piston pin diameter measurement from the bush inside diameter measurement.

Standard oil clearance:

0.005 to 0.011 mm (0.000197 to 0.000433 in.)

Maximum oil clearance:

0.050 mm (0.00197 in.)

Using a rod aligner and feeler gauge, check the connecting rod alignment.

1. Check for bend.
   

   Maximum bend:

   0.05 mm (0.00197 in.) per 100 mm (3.94 in.)
   

   If the bend is more than the maximum, replace the connecting rod sub-assembly.
   




2. Check for twist.
   

   Maximum twist:

   0.15 mm (0.00591 in.) per 100 mm (3.94 in.)
   

   If the twist is more than the maximum, replace the connecting rod sub-assembly.
   

Using a dial indicator, measure the runout at the center journal.

Maximum circle runout:

0.06 mm (0.00236 in.)

Using a micrometer, measure the diameter of each main journal.

Standard diameter:

71.988 to 72.000 mm (2.8342 to 2.8346 in.)

Check each main journal for taper and out-of-round as shown in the illustration.

Maximum taper and out-of-round:

0.02 mm (0.000787 in.)

Using a micrometer, measure the diameter of each crank pin.

Standard diameter:

55.992 to 56.000 mm (2.2044 to 2.2047 in.)

Check each crank pin for taper and out-of-round as shown in the illustration.

Maximum taper and out-of-round:

0.02 mm (0.000787 in.)

Using a vernier caliper, measure the tension portion diameter of the bolt.

Standard diameter:

7.2 to 7.3 mm (0.283 to 0.287 in.)

Minimum diameter:

7.0 mm (0.276 in.)

Using a vernier caliper, measure the thread outside diameter of the crankshaft bearing cap set bolt.

Standard diameter:

10.0 to 10.2 mm (0.394 to 0.402 in.)

Push the check valve with a pin to check if it is stuck. If stuck, replace the oil nozzle.

Push the check valve with a pin to check if it moves smoothly.
If it does not move smoothly, clean or replace the oil nozzle.

While covering A, blow air into B. Check that air does not leak through C. Perform the check again while covering B and blowing air into A.
If air leaks, clean or replace the oil nozzle.

Push the check valve while covering A, and blow air into B. Check that air passes through C. Perform the check again while covering B, pushing the check valve and blowing air into A.
If air does not pass through C, clean or replace the oil nozzle.