Головка Блока Цилиндров Проверка. Corolla Auris

Using a precision straightedge and feeler gauge, measure the warpage of the contact surface of the cylinder block and manifolds.

Maximum warpage:

0.05 mm (0.0020 in.)

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

Apply a light coat of Prussian blue to the valve face.

Lightly press the valve face against the valve seat.

УКАЗАНИЕ:

Do not rotate the valve while pressing the valve.

Check the valve face and valve seat.

1. Check that the contact surfaces of the valve seat and valve face are in the middle area of their respective surfaces, with the width between 1.0 and 1.4 mm (0.039 and 0.055 in.).
   If not, correct the valve seat.
   

2. Check that the contact surfaces of the valve seat and valve face are even around the entire valve seat.
   If not, correct the valve seat.
   

Apply a light coat of Prussian blue to the valve face.

Lightly press the valve face against the valve seat.

УКАЗАНИЕ:

Do not rotate the valve while pressing the valve.

Check the valve face and valve seat.

1. Check that the contact surfaces of the valve seat and valve face are in the middle area of their respective surfaces, with the width between 1.0 and 1.4 mm (0.039 and 0.055 in.).
   If not, correct the valve seat.
   

2. Check that the contact surfaces of the valve seat and valve face are even around the entire valve seat.
   If not, correct the valve seat.
   

Using a gasket scraper, chip off any carbon from the valve head.

Using a wire brush, thoroughly clean the valve.

Using a vernier caliper, measure the valve's overall length.

Standard overall length:

104.4 mm (4.110 in.)

Minimum overall length:

104.1 mm (4.098 in.)

Using a micrometer, measure the diameter of the valve stem.

Standard valve stem diameter:

5.970 to 5.985 mm (0.2350 to 0.2356 in.)

Using a vernier caliper, measure the valve head margin thickness.

Standard margin thickness:

1.40 to 1.60 mm (0.055 to 0.063 in.)

Minimum margin thickness:

0.50 mm (0.0197 in.)

Using a gasket scraper, chip off any carbon from the valve head.

Using a wire brush, thoroughly clean the valve.

Using a vernier caliper, measure the valve's overall length.

Standard overall length:

104.1 mm (4.098 in.)

Minimum overall length:

103.8 mm (4.087 in.)

Using a micrometer, measure the diameter of the valve stem.

Standard valve stem diameter:

5.960 to 5.975 mm (0.2347 to 0.2352 in.)

Using a vernier caliper, measure the valve head margin thickness.

Standard margin thickness:

1.36 to 1.56 mm (0.0535 to 0.0614 in.)

Minimum margin thickness:

0.50 mm (0.0197 in.)

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

Bush inside diameter:

6.010 to 6.030 mm (0.2366 to 0.2374 in.)

Subtract the valve stem diameter measurement from the guide bush inside diameter measurement.

Standard oil clearance:

Item	Specified Condition
Intake	0.025 to 0.060 mm (0.0010 to 0.0024 in.)
Exhaust	0.035 to 0.070 mm (0.0014 to 0.0028 in.)

Maximum oil clearance:

Item	Specified Condition
Intake	0.06 mm (0.0024 in.)
Exhaust	0.07 mm (0.0028 in.)

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

Standard outside diameter:

11.8 to 12.0 mm (0.465 to 0.472 in.)

Minimum outside diameter:

11.20 mm (0.4409 in.)