REMOVE FRONT SEAT ASSEMBLY (DRIVER SEAT) (W/O TILT CAB CAB TYPE)
Remove the seat track cover.
Remove the 4 bolts.
Remove the front seat assembly RH.
REMOVE TRANSMISSION FLOOR SHIFT ASSEMBLY (W/O TILT CAB CAB TYPE)
for G54 Manual Transmission
for R451 Manual Transmission
SEPARATE PARKING BRAKE SHOE LEVER SUB-ASSEMBLY (W/O TILT CAB CAB TYPE)
REMOVE ENGINE SERVICE HOLE SUB COVER SUB-ASSEMBLY (W/O TILT CAB CAB TYPE)
Remove the front door scuff.
Remove the floor mat.
Remove the 7 bolts and the engine service hole sub-cover.
REMOVE THROTTLE CONTROL CABLE SUPPORT
Tech Tips
Remove the throttle control cable support with the accelerator flexible wire connected.
REMOVE INTAKE AIR CONNECTOR SUB-ASSEMBLY
Remove the 3 nuts and bolt, intake air connector and gasket.
REMOVE INTAKE AIR CONNECTOR BRACKET
REMOVE OIL FILLER CAP SUB-ASSEMBLY
REMOVE CYLINDER HEAD COVER NO.2 (w/ Cylinder Head Cover No. 2)
Remove the 4 nuts, plate washers, cylinder head cover No. 2 and cylinder head cover silencer.
REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY
Remove the 8 bolts, 2 nuts, cylinder head cover and gasket.
SET NO. 1 CYLINDER TO TDC / COMPRESSION
Turn the crankshaft pulley and align its groove with timing pointer.
Check that the valve lifters on the No.1 cylinder are loose and valve lifters on the No. 4 are tight.
If not, turn the crankshaft one revolution (360°) and align the mark as above.
INSPECT VALVE CLEARANCE
| *1 | No. 1 EX |
| *2 | No. 1 IN |
| *3 | No. 2 IN |
| *4 | No. 3 EX |
Check only the valves indicated.
Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Record the out - of - specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.
| Valve clearance (Cold) | ||||
|---|---|---|---|---|
|
| *1 | No. 2 EX |
| *2 | No. 3 IN |
| *3 | No. 4 EX |
| *4 | No. 4 IN |
Turn the crankshaft one revolution (360°) and align the mark as above. (See procedure in step 11)
Check only the valves indicated as shown. Measure the valve clearance. (See procedure in step (a))
| Valve clearance (Cold) | ||||
|---|---|---|---|---|
|
ADJUST VALVE CLEARANCE
Remove the adjusting shim.
Turn the crankshaft so that the cam lobe of the camshaft on the adjusting valve points upward.
Using SST, press down the valve lifter.
Position the notch of the valve lifter facing the exhaust manifold side.
Remove the adjusting shim with a small screwdriver and magnetic finger.
Determine the replacement adjusting shim size by following the Formula or Charts:
Using a micrometer, measure the thickness of the removed shim.
Calculate the thickness of a new shim so that the valve clearance comes within specified value.
T = Thickness of removed shim
A = Measured valve clearance
N = Thickness of new shim
| Intake | N = T + (A - 0.25 mm (0.010 in.)) |
| Exhaust | N = T + (A - 0.45 mm (0.018 in.)) |
Select a new shim with a thickness as close as possible to the calculated value.
Tech Tips
Shims are available in 17 sizes in increments of 0.05 mm (0.0020 in.), from 2.50 mm (0.0984 in.) to 3.30 mm (0.1299 in.).
| Intake valve clearance (Cold) |
|---|
| 0.20 - 0.30 mm (0.008 - 0.012 in.) |
| EXAMPLE |
|---|
| The 2.800 mm (0.1102 in.) shim is installed and the measured clearance is 0.350 mm (0.0138 in.). Replace the 2.800 mm (0.1102 in.) shim with a No. 21 shim. |
| Shim No. | Thickness | Shim No. | Thickness |
|---|---|---|---|
| 01 | 2.50 (0.0984) | 46 | 2.95 (0.1161) |
| 42 | 2.55 (0.1004) | 26 | 3.00 (0.1181) |
| 06 | 2.60 (0.1024) | 47 | 3.05 (0.1201) |
| 43 | 2.65 (0.1043) | 31 | 3.10 (0.1220) |
| 11 | 2.70 (0.1063) | 48 | 3.15 (0.1240) |
| 44 | 2.75 (0.1083) | 36 | 3.20 (0.1260) |
| 16 | 2.80 (0.1102) | 49 | 3.25 (0.1280) |
| 45 | 2.85 (0.1122) | 41 | 3.30 (0.1299) |
| 21 | 2.90 (0.1142) | - | - |
| Exhaust valve clearance (Cold) |
|---|
| 0.40 - 0.50mm(0.016 - 0.020 in.) |
| EXAMPLE |
|---|
| The 2.800mm (0.1102 in.) shim is installed and the measured is 0.350 mm (0.0138 in.). Replace the 2.800 mm (0.1102 in.) shim with a No. 11 shim. |
| Shim No. | Thickness | Shim No. | Thickness |
|---|---|---|---|
| 01 | 2.50 (0.0984) | 46 | 2.95 (0.1161) |
| 42 | 2.55 (0.1004) | 26 | 3.00 (0.1181) |
| 06 | 2.60 (0.1024) | 47 | 3.05 (0.1201) |
| 43 | 2.65 (0.1043) | 31 | 3.10 (0.1220) |
| 11 | 2.70 (0.1063) | 48 | 3.15 (0.1240) |
| 44 | 2.75 (0.1083) | 36 | 3.20 (0.1260) |
| 16 | 2.80 (0.1102) | 49 | 3.25 (0.1280) |
| 45 | 2.85 (0.1122) | 41 | 3.30 (0.1299) |
| 21 | 2.90 (0.1142) | - | - |
Install a new adjusting shim.
Place a new adjusting shim on the valve lifter.
Remove the SST.
INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY
| *a | Seal Packing |
Remove any old packing (FIPG) material.
Apply seal packing to the cylinder head as shown in the illustration.
| Seal packing |
|---|
| Toyota Genuine Seal Packing Black, Three Bond 1207B or equivalent |
Install the gasket to the cylinder head cover.
Install the cylinder head cover with 8 bolts and 2 nuts. Uniformly tighten the bolts and nuts in several passes.
INSTALL CYLINDER HEAD COVER NO.2 (w/ Cylinder Head Cover No. 2)
Install the cylinder head cover silencer to the cylinder head cover.
Install the cylinder head cover with the 4 plate washers and nuts.
INSTALL OIL FILLER CAP SUB-ASSEMBLY
INSTALL INTAKE AIR CONNECTOR BRACKET
INSTALL INTAKE AIR CONNECTOR SUB-ASSEMBLY
Install a new gasket to the intake manifold.
Install the intake air connector with the 3 nuts and bolt.
INSTALL THROTTLE CONTROL CABLE SUPPORT
INSTALL ENGINE SERVICE HOLE SUB COVER SUB-ASSEMBLY (W/O TILT CAB CAB TYPE)
INSTALL PARKING BRAKE SHOE LEVER SUB-ASSEMBLY (W/O TILT CAB CAB TYPE)
INSTALL TRANSMISSION FLOOR SHIFT ASSEMBLY (W/O TILT CAB CAB TYPE)
for G54 Manual Transmission
for R451 Manual Transmission
INSTALL FRONT SEAT ASSEMBLY (DRIVER SEAT) (W/O TILT CAB CAB TYPE)
Temporarily install front side of the front seat assembly RH with the 2 bolts.
Install the 2 rear side bolts.
Tighten the 2 front side bolts.
Install the seat track cover.