1.5. Engine — Tightening Torques

• Ask a helper to press the throttle pedal fully down and operate the starter motor until the compression printer shows the highest valve.
• Check the remaining cylinders in the same manner.

Normally the cylinder with the lowest compression should not be less than 80 % when compared with the cylinder with the highest compression. Worn piston rings could be a reason for low compression.

1.5. Engine — Tightening Torques

Cylinder Head Bolts:

169 B Engine to Engine No. 012625

170 B Engine to Engine No. 021874

170 B Engine from Engine No. 021875

• First stage: 5.0 kgm (36 ft.lb.)
• Second stage: .Slacken all bolts
• Third stage: 2.0 kgm (14.5 ft.lb.)
• Fourth stage: .Angle-tighten 90°

169 B Engine from Engine No. 0126261

170 B Engine from Engine No. 031999:

170 C engine

• First stage: 5.0 kgm (36 ft.lb.)
• Second stage: .Slacken all bolts
• Third stage: 2.0 kgm (14.5 ft.lb.)
• Fourth stage: .Angle-tighten 180°

Re-tightening of cylinder head bolts: .Refer to Text (Page 34)

169 B, 170 B, 170 C Engines from April 1989 (“Torx” headq bolts)

• First stage: 6.0 kgm (43.5 ft.lb.)
• Second stage: .Slacken all bolts
• Third stage: 2.0 kgm (14.5 ft.lb.)
• Fourth stage: .Angle-tighten 300°

Re-tightening of bolts: .Refer to Text, Page 34

Cylinder Head Bolt Use:

• To July 1985: 12 x 144 mm long, 19 mm hexagonal head
• From April 1989: 11 x 1.5, 181 mm long, hexagonal head
• From April 1989: 11 x 1.5, 175 mm long, “Torx” head, No. 55

Camshaft sprocket bolts: 2.3 kgm (17 ft.lb.)

Rocker shaft pedestal bolts: 1.5 kgm (11 ft.lb.)

Intermediate plate, timing side: 1.0 kgm (7.2 ft.lb.)

Keeper plate, camshaft: 1.7 kgm (12.2 ft.lb.)

Water pump to cylinder head:

• 10 mm bolts: 2.8 kgm (20 ft.lb.)
• 8 mm bolts: 2.3 kgm (17 ft.lb.)
• 10 mm nuts: 4.3 kgm (31 ft.lb.)

Oil filter bracket: 1.3 kgm (9.5 ft.lb.)

Oil pressure switch: 4.0 kgm (30 ft.lb.)

Main bearing cap bolts: 7.5 kgm (54 ft.lb.)

Big end bearing caps: 4.0 kgm (30 ft.lb.)

Flywheel bolts: 6.8 kgm (49 ft.lb.)

Clutch bolts: 1.5 kgm (11 ft.lb.)

Crankshaft pulley nut: 17.0 kgm (122 ft.lb.)

Oil pump: 1.0 kgm (7.2 ft.lb.)

Crankshaft counter weights: 6.8 kgm (49 ft.lb.)