CAUTION / NOTICE / HINT
Tech Tips
Perform "Inspection After Repair" after replacing the cylinder head sub-assembly.
w/ EGR System: Click here
w/o EGR System: Click here
PROCEDURE
INSTALL SPARK PLUG TUBE
Tech Tips
When using a new cylinder head sub-assembly, the spark plug tubes must be replaced.
*a | 2.0 mm (0.079 in.) |
*b | 4.0 mm (0.157 in.) |
Apply adhesive onto the shaded area of a new spark plug tube.
Adhesive |
---|
Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent. |
Note
Install the spark plug tube within 3 minutes after applying adhesive.
*a | Protrusion Height |
Using a wooden block and hammer, tap in the 4 spark plug tubes to the specified protrusion height.
Standard protrusion height |
---|
112 mm (4.41 in.) |
Note
To avoid tapping in the spark plug tube too far, measure the protrusion height while tapping it.
Be careful not to deform the spark plug tube.
Be careful not to expose the adhesive to engine oil for at least 1 hour after installing it.
INSTALL STUD BOLT
Note
If a stud bolt is deformed or its threads are damaged, replace it.
Using an E8 and E10 "TORX" socket wrench, install the stud bolts.
*a | Intake Side | *b | Front Side |
*c | Exhaust Side | *d | Rear Side |
*e | 26 mm (1.02 in.) | *f | 16.7 mm (0.657 in.) |
*g | 51.7 mm (2.04 in.) | *h | 13 mm (0.512 in.) |
*i | 48 mm (1.89 in.) | *j | 24.5 mm (0.965 in.) |
*k | 14 mm (0.551 in.) | *l | 40 mm (1.58 in.) |
*m | 29 mm (1.14 in.) | - | - |
INSTALL NO. 1 STRAIGHT SCREW PLUG
Note
If coolant leaks from a No. 1 straight screw plug or a No. 1 straight screw plug is corroded, replace it.
Using a 10 mm hexagon wrench, install 3 new cylinder head screw plug gaskets and the 3 No. 1 straight screw plugs.
INSTALL VALVE SPRING SEAT
Install the 16 valve spring seats to the cylinder head sub-assembly.
INSTALL VALVE STEM OIL SEAL
*a | Intake Side |
*b | Exhaust Side |
*c | "NOK" Mark |
*d | Gray |
*e | Black |
Apply a light coat of engine oil to new valve stem oil seals.
Note
Pay attention when installing the intake valve stem oil seals and exhaust valve stem oil seals. For example, installing the intake valve stem oil seal onto the exhaust side or installing the exhaust valve stem oil seal onto the intake side can cause installation problems later.
Tech Tips
The intake valve stem oil seals are gray and the exhaust valve stem oil seals are black.
*a | Correct |
*b | Incorrect |
Using SST, push in the 16 valve stem oil seals.
INSTALL INTAKE VALVE
*a | 30 mm (1.18 in.) or more |
Apply a sufficient coat of engine oil to the tip area of the intake valve as shown in the illustration.
*a | Narrow |
*b | Wide |
Install the 8 intake valves, 8 inner compression springs and 8 valve spring retainers to the cylinder head sub-assembly.
Note
Install the same parts in the same combination to their original locations.
Using SST, compress the inner compression spring and install the 16 valve retainer locks.
Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.
Note
Be careful not to damage the retainer.
INSTALL EXHAUST VALVE
*a | 30 mm (1.18 in.) or more |
Apply a sufficient coat of engine oil to the tip area of the exhaust valve as shown in the illustration.
*a | Narrow |
*b | Wide |
Install the 8 exhaust valves, 8 inner compression springs and 8 valve spring retainers to the cylinder head sub-assembly.
Note
Install the same parts in the same combination to their original locations.
Using SST, compress the inner compression spring and install the 16 valve retainer locks.
Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.
Note
Be careful not to damage the retainer.