Cylinder Head. OThe camshaft caps are machined with the cylinder head so if a new cylinder head is installed, use the caps that are supplied with the new head

ENGINE TOP END

NOTE

OThe camshaft caps are machined with the cylinder head so if a new cylinder head is installed, use the caps that are supplied with the new head.

• Tighten the 10 mm cylinder head bolts following the tight­
ening sequence. Tighten them first to about one half of
the specified torque.

Torque - Cylinder Head Bolts 10 mm: 51 N-m (5.2 kgf-m, 38 ft-lb) Cylinder Head Bolts 6 mm: 9.8 N-m (1.0 kgf-m, 87 in-lb)

• Tighten the 6 mm cylinder bolts.

• Install the camshafts, camshaft caps and top chain guide. Install the head oil pipes.

Cylinder Head Warp

• Clean the cylinder head (see Cylinder Head Cleaning).

• Lay a straightedge [A] across the lower surface of the head at several different points, and measure warp by inserting a thickness gauge [B] between the straightedge and the head.

• If warp exceeds the service limit, repair the mating sur­face. Replace the cylinder head if the mating surface is badly damaged.

Cylinder Head Warp Service Limit: 0.05 mm (0.002 in.)

Cylinder Head Cleaning

• Remove the cylinder head (see Cylinder Head Removal).

• Remove the valves (see Valve Removal).

• Wash the head with a high-flash point solvent.

• Scrape [A] the carbon out of the combustion chamber and exhaust port with a suitable tool.

• Using compressed air, blow out any particles which may obstruct the oil passage [A] in the cylinder head. Install the valves (see Valve Installation).

Дата добавления: 2014-12-23