Illustration 1 | g03736242 |
Typical example |
Lubricate the threads and the underside of the head bolts with clean engine oil.
- Tighten the M15 bolts in the sequence that is shown in illustration 1 to the following torque. ...
130 N·m (96 lb ft) - Tighten the M12 bolts in the sequence that is shown in illustration 1 to the following torque. ...
65 N·m (48 lb ft) - Tighten the M15 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 90 degrees
- Tighten the M12 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 90 degrees
- Tighten the M15 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 70 degrees
- Tighten the M12 bolts in the sequence that is shown in illustration 1 to the additional amount. ... 60 degrees
- Tighten the M12 bolts in the sequence that is shown in illustration 1 to the following torque. ...
Minimum thickness of cylinder head ...
Illustration 2 | g03698264 |
Flatness of the cylinder head (typical example) |
Note: The maximum distortion of the bottom face of the cylinder head is given in table 1.
Dimension | Maximum Permissible Distortion |
---|---|
Width (A) | |
Length (B) | |
Diagonal Line (C) | |
Illustration 3 | g02328933 |
Typical example |
(D) Valve guide height from the top of the valve guide to the valve spring seat ...
(E) Outside diameter of the valve guides ...
(F) Length of the valve guides ...
(G) Internal diameter of the valve guides ...
(H) Valve depths
- Inlet ...
0.3 to 0.7 mm (0.01181 to 0.02756 inch) - The service limit for the depth of the inlet valve ...
0.9 mm (0.03543 inch) - Exhaust ...
0.3 to 0.7 mm (0.01181 to 0.02756 inch) - The service limit for the exhaust valve depth ...
1 mm (0.03937 inch) - The service limit for the depth of the inlet valve ...
Illustration 4 | g02474819 |
Typical example |
(J) Diameter of the parent bore in the cylinder head ...
(K) Seat angle
- Inlet ... 59.5 degrees
- Exhaust ... 59.5 degrees
Illustration 5 | g02847819 |
Typical example |
(L) Seat surface finish ... Ra 1.6 microns
(M) Concentricity of valve seat to valve guide parent bore Maximum Total Indicated Reading (TIR) ...