3UR-FE Cylinder head gasket - Installation

Using a vernier caliper, measure the diameter of the elongated thread at the measuring point.

Measuring point:

94 mm (3.70 in.) for intake side bolt

89 mm (3.50 in.) for exhaust side bolt

Standard diameter:

10.85 to 11.00 mm (0.427 to 0.433 in.)

Minimum diameter:

10.6 mm (0.417 in.)

If the diameter is less than the minimum, replace the cylinder head bolt.

HINT:

If a visual check reveals no excessively thin areas, check the center of the bolt (see illustration) and find the area that has the smallest diameter.

Using a precision straightedge and feeler gauge, measure the warpage of the surfaces where the cylinder head contacts the cylinder block and manifold.

Standard Warpage:

Maximum warpage:

0.10 mm (0.00394 in.)

If the warpage is more than the maximum, replace the cylinder head.

Using a dye penetrant, check the intake ports, exhaust ports and cylinder surface for cracks.

If cracked, replace the cylinder head.

Clean the cylinder block with solvent.

Set the piston of the No. 1 cylinder to slightly ATDC.

Place the cylinder head gasket on the cylinder block surface with the front face of the Lot No. stamp upward.

NOTICE:

1. Be careful of the installation direction.
2. Make sure that no oil is on the front end (indicated by the arrows) of the cylinder head gasket.

Place the cylinder head on the cylinder block.

NOTICE:

1. Ensure that no oil is on the mounting surface of the cylinder head.
2. Gently place the cylinder head in order not to damage the gasket with the bottom part of the head.

HINT:

The cylinder head bolts are tightened in 3 progressive steps.

Apply a light coat of engine oil to the threads and under the heads of the cylinder head bolts.

Step 1:

1. Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 10 cylinder head bolts with the plate washers in several steps in the sequence shown in the illustration.

   Torque:

   36 N*m{ 367 kgf*cm , 27 ft.*lbf }

Step 2:

1. Mark the front side of each cylinder head bolt head with paint.

2. Tighten the cylinder head bolts another 90°.

Step 3:

1. Tighten the cylinder head bolts an additional 90°.

2. Check that the paint marks are now at a 180° angle to the front.

Install and uniformly tighten the 2 bolts in the sequence shown in the illustration.

Torque:

21 N*m{ 214 kgf*cm , 15 ft.*lbf }

Clean the cylinder block with solvent.

Set the piston of the No. 1 cylinder to slightly ATDC.

Place the cylinder head gasket on the cylinder block surface with the front face of the Lot No. stamp upward.

NOTICE:

1. Be careful of the installation direction.
2. Make sure that no oil is on the front end (indicated by the arrows) of the cylinder head gasket.

Place the cylinder head on the cylinder block.

NOTICE:

1. Ensure that no oil is on the mounting surface of the cylinder head.
2. Gently place the cylinder head in order not to damage the gasket with the bottom part of the head.

HINT:

The cylinder head bolts are tightened in 3 progressive steps.

Apply a light coat of engine oil to the threads and under the heads of the cylinder head bolts.

Step 1:

HINT:

The cylinder head bolts are tightened in 3 progressive steps.

1. Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 10 cylinder head bolts with the plate washers in several steps in the sequence shown in the illustration.

   Torque:

   36 N*m{ 367 kgf*cm , 27 ft.*lbf }

Step 2:

1. Mark the front side of each cylinder head bolt head with paint.

2. Tighten the cylinder head bolts another 90°.

Step 3:

1. Tighten the cylinder head bolts an additional 90°.

2. Check that the paint marks are now at a 180° angle to the front.

Install and uniformly tighten the 2 bolts in the sequence shown in the illustration.

Torque:

21 N*m{ 214 kgf*cm , 15 ft.*lbf }

Apply a light coat of engine oil to the valve stem caps.

Install the 32 valve stem caps to the cylinder heads.

Inspect the valve lash adjuster before installing it.

Install the 32 valve lash adjusters to the cylinder heads.

NOTICE:

Install the lash adjuster to the same place it was removed from.

Apply engine oil to the lash adjuster tips and valve stem cap ends.

Install the 32 valve rocker arms as shown in the illustration.