Cylinder Block ASSY (2AZ-FE): Overhaul

WARNING: This page is about a different variant/trim than selected.

INSPECT CONNECTING ROD THRUST CLEARANCE
1. Using a dial indicator, measure the thrust clearance while moving the connecting rod back and forth.
  1. Standard thrust clearance: 0.160 to 0.362 mm (0.0063 to 0.0143 in.)
  2. Maximum thrust clearance: 0.362 mm (0.0143 in.)
If the thrust clearance is greater than the maximum, replace the connecting rod assembly(s). If necessary, replace the crankshaft.

Fig 1: Measuring Connecting Rod Thrust Clearance While Moving Connecting Rod Back And Forth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CONNECTING ROD OIL CLEARANCE

HINT:

The connecting rod cap bolts are tightened in 2 progressive steps.

Check that the matchmarks on the connecting rod and cap are aligned to ensure the correct reassembly.
HINT:

The matchmarks on the connecting rods and caps are for ensuring the correct reassembly.
Using a 12 mm socket wrench, remove the 2 connecting rod cap bolts.
Using the 2 removed connecting rod cap bolts, remove the connecting rod cap and lower bearing by wiggling the connecting rod cap right and left.
HINT:

Keep the lower bearing inserted to the connecting rod cap.
Clean the crank pin and bearing.
Check the crank pin and bearing for pitting and scratches.

Fig 2: Tightening Connecting Rod Cap Bolts
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Lay a strip of Plastigage on the crank pin.

Fig 3: Laying Strip Of Plastigage On Crank Pin
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check that the front mark of the connecting rod cap is facing in the correct direction.
Apply a light coat of engine oil on the threads and under the heads of the connecting rod cap bolts.
Install the connecting cap (see step 37).
NOTE: Do not turn the crankshaft.
Remove the 2 bolts and connecting rod cap.

Fig 4: Identifying Front Mark On Connecting Rod Cap
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Measure the Plastigage at its widest point.

Standard oil clearance: 0.024 to 0.048 mm (0.0009 to 0.0019 in.)
Maximum oil clearance: 0.08 mm (0.0031 in.)

If the crank pin or bearing is damaged, replace the bearings. If necessary, replace the crankshaft.

Fig 5: Measuring Plastigage At Its Widest Point

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HINT:

If replacing a bearing, replace it with one that has the same number as the connecting rod. There are 3 sizes of standard bearings: 1, 2 and 3.

Standard bearing center wall thickness:

STANDARD BEARING CENTER WALL THICKNESS SPECIFICATION

Mark 1	1.485 to 1.488 mm (0.05854 to 0.05858 in.)
Mark 2	1.489 to 1.491 mm (0.05862 to 0.05870 in.)
Mark 3	1.492 to 1.494 mm (0.05874 to 0.05881 in.)

Completely remove the Plastigage.

Fig 6: Identifying Standard Bearing Marks On Connecting Rod Cap And Bearing

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

REMOVE PISTON SUB-ASSY W/CONNECTING ROD
1. Using a ridge reamer, remove all the carbon from the top of the cylinder.
2. Push the piston, connecting rod assembly and upper bearing through the top of the cylinder block.
HINT:
- Keep the bearing, connecting rod and cap together.
- Arrange the piston and connecting rod assemblies in the correct order.
Fig 7: Removing Carbon From Top Of Cylinder Using Ridge Reamer
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REMOVE CONNECTING ROD BEARING
REMOVE PISTON RING SET
1. Using a piston ring expander, remove the 2 compression rings.
2. Remove the 2 side rails and oil ring by hand.
Fig 8: Removing Compression Rings
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REMOVE PISTON PIN HOLE SNAP RING
1. Using a small screwdriver, pry out the 2 snap rings.
Fig 9: Removing Piston Pin Hole Snap ring
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REMOVE PISTON
1. Gradually heat the piston to approximately 80 to 90°C (176 to 194°F).
  
  Fig 10: Heating Piston
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a plastic-faced hammer and brass bar, lightly tap out the piston pin and remove the connecting rod.
HINT:
- The piston and pin are a matched set.
- Arrange the pistons, pins, rings, connecting rods and bearings in the correct order.
Fig 11: Removing Piston Pin And Connecting Rod
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INSPECT CRANKSHAFT THRUST CLEARANCE
1. Using a dial indicator, measure the thrust clearance while prying the crankshaft back and forth with a screwdriver.
  1. Standard thrust clearance: 0.040 to 0.240 mm (0.0016 to 0.0094 in.)
  2. Maximum thrust clearance: 0.30 mm (0.0118 in.)
  If the thrust clearance is greater than the maximum, replace the thrust washers as a set.
  1. Thrust washer thickness:
  2. 1.930 to 1.980 mm (0.0760 to 0.0780 in.)
Fig 12: Inspecting Crankshaft Thrust Clearance While Prying Crankshaft Back And Forth
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INSPECT CRANKSHAFT OIL CLEARANCE

Uniformly loosen and remove the 10 main bearing cap bolts, in the sequence shown in the illustration.

Fig 13: Identifying Removal Sequence Of Main Bearing Cap Bolts
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Use 2 removed main bearing cap bolts to remove the 5 main bearing caps and 5 lower bearings.
NOTE: Insert the bolts into one of the caps. Ease the cap out by gently pulling up and applying force toward the front and back side of the cylinder block, as shown in the illustration. Take care not to damage the contact surfaces of the cap and cylinder block.

HINT:
- Keep the lower bearing and main bearing cap together.
- Arrange the main bearing caps in correct order.
Lift out the crankshaft.
HINT:

Keep the upper bearings together with the cylinder block.
Clean each main journal and bearing.
Check each main journal and bearing for pitting and scratches.
If the journal or bearing is damaged, replace the bearings. If necessary, replace the crankshaft.

Fig 14: Removing Main Bearing Cap And Lower Bearings
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Place the crankshaft on the cylinder block.
Lay a strip of Plastigage across each journal.
Install the main bearing caps (see step 36).
NOTE: Do not turn the crankshaft.
Remove the main bearing cap (see steps (a) to (b) above).

Fig 15: Laying Strip Of Plastigage Across Each Journal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the Plastigage at its widest point.
1. Standard oil clearance:
2. 0.024 to 0.048 mm (0.00094 to 0.00189 in.)
If the oil clearance is greater than the maximum, replace the bearings. If necessary, replace the crankshaft.

Fig 16: Measuring Plastigage At Widest Point
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If using a standard bearing, replace it with one having the same number. If the number of the bearing cannot be determined, select the correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft, and then select the bearing according to the chart below. There are 4 sizes of standard bearings: 1, 2, 3, and 4.

STANDARD BEARING SIZE

Cylinder block (A) + Crankshaft (B)	0 to 2	3 to 5	6 to 8	9 to 11
Use bearing	1	2	3	4

HINT:

EXAMPLE

Cylinder block 4 (A) + Crankshaft 3 (B) =

Total number 7 (Use bearing 3)

Fig 17: Identifying Standard Bearing Number Marks

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Reference:

Fig 18: Standard Bearing Specification Chart

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Completely remove the Plastigage.

REMOVE CRANKSHAFT
1. Lift out the crankshaft.
2. Remove the 5 upper main bearings and 2 thrust washers from the cylinder block.
HINT:

Arrange the main bearings and thrust washers in the correct order.
REMOVE CRANKSHAFT THRUST WASHER UPPER
REMOVE CRANKSHAFT BEARING
HINT:

Arrange the bearings in the correct order.
REMOVE CRANKSHAFT BEARING NO.2
HINT:

Arrange the main bearings and thrust washers in the correct order.
REMOVE STUD BOLT
CLEAN CYLINDER BLOCK
NOTE: 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.
INSPECT CYLINDER BLOCK FOR FLATNESS
1. Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head gasket for warpage.
  1. Maximum warpage:
  2. 0.05 mm (0.0020 in.)
If the warpage is greater than the maximum, replace the cylinder block.

Fig 19: Inspecting Cylinder Block For Flatness
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INSPECT CYLINDER BORE
1. Using a cylinder gauge, measure the cylinder bore diameter at positions A and B in the thrust and axial directions.
  1. Standard diameter: 88.500 to 88.513 mm (3.4842 to 3.4848 in.)
  2. Maximum diameter: 88.633 mm (3.4895 in.)
If the measured diameters is greater than the standard, replace the cylinder block.

Fig 20: Measuring Cylinder Bore Diameter
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INSPECT PISTON DIAMETER
1. Using a micrometer, measure the piston diameter at right angles to the piston pin center line, 30.3 mm (1.193 in.) from the piston head.
  1. Piston diameter: 88.439 to 88.449 mm (3.4818 to 3.4822 in.)
Fig 21: Inspecting Piston Diameter
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INSPECT PISTON CLEARANCE
1. Subtract the piston diameter measurement from the cylinder bore diameter measurement.
  1. Specified oil clearance: 0.051 to 0.100 mm (0.0020 to 0.0039 in.)
If the clearance is greater than the maximum, replace all the 4 pistons. If necessary, replace the cylinder block.
INSPECT RING GROOVE CLEARANCE
1. Using a feeler gauge, measure the clearance between the piston ring and the wall of the ring groove.
  1. Ring groove clearance: 0.030 to 0.070 mm (0.0012 to 0.0028 in.)
If the clearance is not as specified, replace the piston.

Fig 22: Measuring Clearance Between Piston Ring And Wall Of Ring Groove
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INSPECT PISTON RING END GAP
1. 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.
  
  Fig 23: Pushing Piston Ring From Top Of Cylinder Block
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a feeler gauge, measure the end gap.
  1. Standard end gap:
  2. No. 1 0.22 to 0.32 mm (0.0087 to 0.0126 in.)
  3. No. 2 0.50 to 0.60 mm (0.0197 to 0.0236 in.)
  4. Oil (side rail) 0.10 to 0.35 mm (0.0039 to 0.0138 in.)
  5. Maximum end gap:
  6. No. 1 0.89 mm (0.0350 in.)
  7. No. 2 1.35 mm (0.0531 in.)
  8. Oil (side rail) 0.73 mm (0.0287 in.)
If the end gap is greater than the maximum, replace the piston ring. If the end gap is greater than the maximum even with a new piston ring, replace the cylinder block.

Fig 24: Inspecting Piston Ring End Gap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT PISTON PIN OIL CLEARANCE

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

Pin hole bush diameter: 22.001 to 22.010 mm (0.8662 to 0.8665 in.)
Pin hole bush diameter (Reference):

PIN HOLE BUSH DIAMETER SPECIFICATION

Mark	Specified Condition
A	22.001 to 22.004 mm (0.86618 to 0.86630 in.)
B	22.005 to 22.007 mm (0.86634 to 0.86612 in.)
C	22.008 to 22.010 mm (0.86645 to 0.86653 in.)

Fig 25: Measuring Inside Diameter Of Piston Bushing

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a micrometer, measure the piston pin diameter.

Piston pin diameter:
21.997 to 22.009 mm (0.8660 to 0.8665 in.)
Piston pin diameter (Reference):

PISTON PIN DIAMETER SPECIFICATION

Mark	Specified Condition
A	21.997 to 22.000 mm (0.86602 to 0.86614 in.)
B	22.001 to 22.003 mm (0.86618 to 0.86626 in.)
C	22.004 to 22.006 mm (0.86630 to 0.86638 in.)

Fig 26: Measuring Piston Pin Diameter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Bush inside diameter:
22.005 to 22.014 mm (0.8663 to 0.8667 in.)
Bush inside diameter:

CONNECTING ROD BUSH INSIDE DIAMETER SPECIFICATION

Mark	Specified Condition
A	22.005 to 22.008 mm (0.8663 to 0.8665 in.)
B	22.008 to 22.011 mm (0.8665 to 0.8666 in.)
C	22.011 to 22.014 mm (0.8666 to 0.8667 in.)

Subtract the piston pin diameter measurement from the piton pin bush hole diameter measurement.
1. Standard oil clearance: 0.001 to 0.007 mm (0.00004 to 0.00028 in.)
2. Maximum oil clearance: 0.010 mm (0.0020 in.)
If the oil clearance is greater than maximum, replace the connecting rod. If necessary, replace the piston and piston pin as a set.

Fig 27: Measuring Inside Diameter Of Connecting Rod Bush
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the oil clearance is greater than the maximum, replace the connecting rod. If necessary, replace the piston and piston pin as a set.
Subtract the piston pin diameter measurement from the bushing inside diameter measurement.
1. Standard oil clearance:
2. 0.005 to 0.011 mm (0.0002 to 0.0004 in.)
3. Maximum oil clearance: 0.010 mm (0.0020 in.)

If the oil clearance is greater than the maximum, replace the connecting rod. If necessary, replace the connecting rod and piston pin as a set.

Fig 28: Identifying Piston Bushing Inside Diameter Mark And Connecting Rod Bushing Inside Diameter Mark

INSPECT CONNECTING ROD SUB-ASSY
1. Using a rod aligner and feeler gauge, check the connecting rod alignment.
  1. Check for out-of-alignment.
    1. Maximum out-of-alignment: 0.05 mm (0.0020 in.) per 100 mm (3.94 in.)
    If the out-of-alignment is greater than the maximum, replace the connecting rod assembly.
    
    Fig 29: Checking Connecting Rod Alignment
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check for twist.
    1. Maximum twist: 0.15 mm (0.0059 in.) per 100 mm (3.94 in.)
If the twist is greater than the maximum, replace the connecting rod assembly.

Fig 30: Inspecting Connecting Rod For Twist
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CONNECTING ROD BOLT
1. Using a vernier caliper, measure the tension portion diameter of the bolt.
  1. Standard diameter: 7.2 to 7.3 mm (0.283 to 0.287 in.)
  2. Maximum diameter: 7.0 mm (0.276 in.)
If the diameter is less than the minimum, replace the bolt.

Fig 31: Inspecting Tension Portion Diameter Of Connecting Rod Bolt
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CRANKSHAFT

Using a dial indicator and V-blocks, measure the circle runout, as shown in the illustration.
1. Maximum circle runout: 0.03 mm (0.0012 in.)
If the circle runout is greater than the maximum, replace the crankshaft.

Fig 32: Measuring Crankshaft Circle Runout
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using A micrometer, measure the diameter of each main journal.
1. Diameter: 54.988 to 55.000 mm (2.16488 to 2.16535 in.)
If the diameter is not as specified, check the oil clearance (see step 26). If necessary, replace the crankshaft.

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

Maximum taper and out-of-round: 0.003 mm (0.0001 in.)

If the taper and out-of-round is greater than the maximum, replace the crankshaft.

Diameter (Reference):

MAIN JOURNAL DIAMETER MARKS AND SPECIFICATION

Mark	Specified Condition
0	54.999 to 55.000 mm (2.16531 to 2.16535 in.)
1	54.997 to 54.998 mm (2.16523 to 2.16527 in.)
2	54.995 to 54.996 mm (2.16515 to 2.16519 in.)
3	54.993 to 54.994 mm (2.16507 to 2.16511 in.)
4	54.991 to 54.992 mm (2.16499 to 2.16504 in.)
5	54.989 to 54.990 mm (2.16491 to 2.16495 in.)

Fig 33: Identifying Main Journal Diameter And Diameter Marks

Using a micrometer, measure the diameter of each crank pin.
1. Diameter: 47.990 to 48.000 mm (1.8894 to 1.8898 in.)
If the diameter is not as specified, check the oil clearance (see step 2). If necessary, replace the crankshaft.
Check each crank pin for taper and out-of-round as shown in the illustration.
1. Maximum taper and out-of-round: 0.003 mm (0.0001 in.)

If the taper and out-of-round is greater than the maximum, replace the crankshaft.

Fig 34: Identifying Crank Pin Diameter

INSPECT CRANKSHAFT BEARING CAP SET BOLT
1. Using a vernier caliper, measure the tension portion diameter of the bolt.
  1. Standard diameter: 7.3 to 7.6 mm (0.287 to 0.299 in.)
  2. Minimum diameter: 7.2 mm (0.283 in.)
If the diameter is less than the minimum, replace the bolt.

Fig 35: Measuring Tension Portion Diameter Of Crankshaft Bearing Cap Bolt
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL RING PIN
1. Using a plastic-faced hammer, tap into the ring pin.
Fig 36: Identifying Ring Pins Dimension
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INSTALL TIGHT PLUG
1. Apply adhesive around the tight plugs.
  1. Adhesive: Part No. 08833-00070, THREE BOND 1324 or equivalent.
2. Using SST, install new tight plugs as shown in the illustration.
  1. SST 09950-60010 (09951-00200), 09950-70010 (09951-07100)
Fig 37: Installing New Tight Plug
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL STUD BOLT
1. Install the stud bolts as shown in the illustration.
  1. Torque:
  2. 5.0 N.m (51 kgf.cm, 44 in..lbf) for stud bolt A
  3. 10 N.m (102 kgf.cm, 7 ft.lbf) for stud bolt B
  4. 5.0 N.m (51 kgf.cm, 44 in..lbf) for stud bolt C
Fig 38: Identifying Stud Bolt Dimension
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INSTALL STRAIGHT PIN
1. Using a plastic-faced hammer, tap into the straight pin.
Fig 39: Identifying Straight Pin Dimension
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INSTALL PISTON
1. Using a small screwdriver, install a new snap ring at one end of the piston pin hole.
2. Gradually heat the piston to approximately 80 to 90°C (176 to 194°F).
  
  Fig 40: Installing snap ring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Align the front marks of the piston and connecting rod, and push in the piston with your thumb.
4. Using a small screwdriver, install a new snap ring on the other end of the piston pin hole.
Fig 41: Aligning Front Mark Of Piston And Connecting Rod
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL PISTON RING SET
1. Install the oil ring expander and 2 side rails by hand.
2. Using a piston ring expander, install the 2 compression rings with the painted mark as shown in the illustration.
  NOTE: Install the compression ring No. 2 with the code mark (2N) facing upward.
  
  Fig 42: Installing Compression Rings
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Position the piston rings so that the ring ends are as shown in the illustration.
Fig 43: Identifying Position Ring Ends Position
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INSTALL CRANKSHAFT BEARING
1. Install the upper bearing with an oil groove on the cylinder block.
NOTE: Clean the contact surfaces of the bearing and the cylinder block. The surfaces should be free of dust and oils.

Fig 44: Installing Crankshaft Bearing On Cylinder Block
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INSTALL CRANKSHAFT BEARING NO.2
1. Install the lower bearing on bearing cap.
NOTE: Clean the contact surfaces of the bearing and the bearing cap. The surfaces should be free of dust and oils.

Fig 45: Installing Crankshaft Lower Bearing On Bearing Cap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL CRANKSHAFT THRUST WASHER UPPER
1. Install the 2 thrust washers under the No. 3 journal position of the cylinder block with the oil grooves facing outward.
INSTALL CRANKSHAFT
1. Apply engine oil to upper bearing and install the crankshaft on the cylinder block.
2. Examine the front marks and numbers and install the bearing caps on the cylinder block.
3. Apply a light coat of engine oil on the threads and under the head of bearing cap bolts.
  
  Fig 46: Installing Crankshaft Upper Thrust Washer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Install and uniformly tighten 10 main bearing cap bolts in several passes, in the sequence shown.
  1. Torque: 40 N.m (408 kgf.cm, 30 ft.lbf)
  Fig 47: Identifying Tightening Sequence Of Main Bearing Cap Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Mark the front side of the bearing cap bolts with paint.
6. Retighten the bearing cap bolts 90° in the sequence shown.
7. Check that the painted mark is now at a 90°angle to the front.
8. Check that the crankshaft turns smoothly.
Fig 48: Identifying Retightening Angle Of Bearing Cap Bolts
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INSTALL CONNECTING ROD BEARING
1. Align the bearing claw with the groove of the connecting rod or connecting cap.
NOTE: Clean the backside of the bearing and the bearing surface of the connecting rod. The surface should be free of dust and oil.
INSTALL PISTON
NOTE: The connecting rod cap bolts are tightened in 2 progressive steps.
1. Apply engine oil to the cylinder walls, the pistons, and the surfaces of connecting rod bearings.
2. Check the position of the piston ring ends.
  
  Fig 49: Aligning Bearing Claws With Connecting Rod Or Connecting Cap Groove
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Using a piston ring compressor, push the correctly numbered piston and connecting rod assemblies into each cylinder with the front mark of the piston facing forward.
  NOTE: Match the numbered connecting rod cap with the connecting rod.
  
  Fig 50: Installing Piston And Connecting Rod Into Cylinder
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check that the protrusion of the connecting rod cap is facing in the correct direction.
5. Apply a light coat of engine oil on the threads and under the heads of the connecting rod cap bolts.
6. Using a 12 mm socket wrench, uniformly tighten the 2 bolts.
  1. Torque: 25 N.m (255 kgf.cm, 18 ft.lbf)
7. Mark the front of the connecting cap bolts with paint.
  
  Fig 51: Identifying Front Mark On Connecting Rod Cap
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Retighten the cap bolts 90° as shown in the illustration.
9. Check that the crankshaft turns smoothly. SST 09011-38121
Fig 52: Identifying Retightening Angle Of Bearing Cap Bolts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002