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| Illustration 1 | g00819698 |
Typical example | |
(1) Dowel pins
The dowel pins in the cylinder block hold the cylinder head gasket in the correct position when the cylinder head is installed.
(2) Cylinder head gasket
(3) The stamped marking on the cylinder head gasket must face upward. This ensures that the cylinder head gasket is installed correctly.
Refer to Testing and Adjusting, "Cylinder Head - Inspect" for the procedures for measuring the cylinder head.
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| Illustration 2 | g00819738 |
(5) Piston height
| Selection of Head Gasket for the C1.5 Marine Engine | |
| Piston Height above Top Face of Cylinder Block | Gasket Thickness |
0.60 to 0.69 mm (0.0236 to 0.0272 inch) |
1.3 mm (0.051 inch) |
0.70 to 0.79 mm (0.0276 to 0.0311 inch) |
1.4 mm (0.055 inch) |
| Selection of Head Gasket for the C2.2 Marine Engine | |
| Piston Height below Top Face of Cylinder Block | Gasket Thickness |
-0.45 to -0.30 mm (-0.0177 to -0.0118 inch) |
0.4 mm (0.016 inch) |
-0.29 to -0.20 mm (-0.0114 to -0.0079 inch) |
0.5 mm (0.020 inch) |
Note: If the cylinder head has been machined, check the valve depth below the cylinder head face. See Specifications, "Cylinder Head Valves". Before any work is done on the valve seats, new valve guides must be installed.
Tightening Procedure for the Cylinder Head
C1.5 Marine Engine
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| Illustration 3 | g00900073 |
Use the following procedure in order to tighten the bolts for the cylinder head.
- Put clean engine oil on the threads of the bolts. The bolts are tightened in the numerical sequence that is shown in Illustration 3.
Tighten the bolts to the following torque. ... 101 N·m (74.5 lb ft)
- Repeat the procedure in Step 1 to ensure that all of the bolts are tightened to the correct torque.
C2.2 Marine Engine
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| Illustration 4 | g00900074 |
Use the following procedure in order to tighten the bolts for the cylinder head.
- Put clean engine oil on the threads of the bolts. The bolts are tightened in the numerical sequence that is shown in Illustration 4.
Torque for bolts ... 101 N·m (74.5 lb ft)
- Repeat the procedure in Step 1 to ensure that all of the bolts are tightened to the correct torque.
Measuring the Distortion of the Cylinder Head
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| Illustration 5 | g00900977 |
Typical example | |
Distortion of the cylinder head ... 0.00 to 0.05 mm (0.000 to 0.002 inch)
Maximum service limit ... 0.12 mm (0.005 inch)
Maximum regrind limit ... 0.15 mm (0.006 inch)
Note: Use a straight edge and a feeler gauge to check the six positions for distortion.
Refer to Testing and Adjusting, "Cylinder Head - Inspect" for the procedures for measuring the cylinder head.
Note: If the cylinder head has been machined, check the valve depth below the cylinder head face. Refer to Specifications, "Cylinder Head Valves" for valve depth.