Remove Piston And Connecting Rod Assemblies

(a) Remove all the carbon from the top of the cylinder.

Toyota Tercel Rod Bolt

(b) Cover the rod bolts with a short piece of hose to protect the crank pin from damage.

(c) Push the piston and connecting rod assembly out through the top of the cylinder block.

(d) Arrange the pistons and connecting rod caps in order.

I M2973

21. CHECK CRANKSHAFT THRUST CLEARANCE

Using a dial gauge, measure the crankshaft thrust clearance while prying the crankshaft back and forth with a screwdriver.

{0.0020 - 0.0098 In.) Maximum clearance: 0.30mm (0.0118 In.)

If the clearance is greater than maximum, replace the thrust washers as a set and/or crankshaft.

HINT: Thrust washer thickness:

22. REMOVE MAIN BEARING CAPS AND CHECK OIL CLEARANCE

(a) Uniformly loosen and remove the main bearing cap bolts in several passes, in the sequence shown.

I M2973

(b) Using the removed bearing cap bolts, wiggle the bearing cap back and forth, and remove it with the lower bearing and thrust washers (No.4 journal only).

HINT:

• Keep the lower bearing inserted with the cap.

• Arrange the caps and lower thrust washers in correct order.

(c) Lift off the crankshaft.

HINT: Keep the upper bearings and upper thrust washers (for the No.4 journal only) inserted in the cylinder block.

(d) Clean the journals and bearings.

(e) Check the journals and bearings for pitting and scratches.

If the journal or a bearing is damaged, grind or replace the crankshaft and replace the bearings.

(f) Install the upper main bearing on the cylinder block and crankshaft.

(g) Lay a strip of Plastigage across the main journals.

IM2974

1997 Toyota Main And Rod Bearing Torque

(h) Install the main bearing caps. Torque the cap bolts. Torque: 1.040 kg-cm (75 ft-lb, 102 N-m) HINT: Do not turn crankshaft.

(i) Remove the main bearing caps.

(j) Measure the Plastigage at its widest point.

Standard clearance: 0.030 - 0.048 mm

(0.0012 - 0.0019 in.) Maximum clearance: 0.07 mm (0.0028 in.)

If the oil clearance is greater than maximum, replace the bearings. If necessary, replace the crankshaft.

Undersized bearing: U/S 0.25

HINT: If using a standard size bearing, replace with one having the same number. If the number of the bearing cannot be determined, select a bearing from the table below according to the numbers imprinted on the cylinder block and crankshaft. There are five sizes of standard bearings, marked "1", "2", "3", "4" and "5" accordingly.

" —

Number marked

Cylinder Block

1

1

2

1

2

3

2

3

3

Cfankitiaft

0

1

0

2

1

0

2

1

2

Bearing

1

2

2

3

3

3

4

4

5

Example: Cylinder Block "2Crankshaft "1" - Bearing "3"

Example: Cylinder Block "2Crankshaft "1" - Bearing "3"

Plastigage

Plastigage

Plastigage

IM2974

No. 7 Journal

rM*890

fMCDM

No. 7 Journal

Mark

Mark

Mark

(Reference)

(Reference)

Mark

Cylinder Block Main Journal Bore

Main Journal Diameter

Bearing Center Wall Thickne*}

0

-

60.007 - 60.012 (2.3625 - 2.3627)

-

1

64.024 - 64.030 (2.5206 - 2.5209)

60.001 - 60.006 (2.3622 - 2.3624)

1.988- 1.991 (0.0783 - 0.0784)

2

64.031 - 64.036 (2.5209 - 2.5211)

59.994 - 60.000 (2.3620 - 2.3622)

1.992- 1.994 (0.0784 - 0.0785)

3

64.037 - 64.042 (2.5211 -2.5213)

-

1.995- 1.997 (0.0785 - 0.0786)

4

-

-

1.998 - 2.000 <0.0787 - 0.0787)

5

-

-

2.001 - 2.003 (0.0788 - 0.0789)

U/S 0.25

64.022 - 64.046 (2.5205 - 2.5215)

59.730 - 59.740 (2.3516 - 2.3520)

2.123-2.133 <0.0086 - 0.0840)

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