1WW ENGINE MECHANICAL SERVICE DATA

ENGINE
Engine speed

Standard idle speed

(Reference)

830 rpm
Compression

Standard pressure

(Reference)

1600 kPa (16.3 kgf/cm2, 232 psi)

CYLINDER HEAD GASKET
Select cylinder head gasket Standard piston protrusion 0.420 to 0.680 mm (0.0165 to 0.0267 in.)
Piston protrusion 0.42 mm (0.0165 in.) Use 1 hole
0.42 to 0.53 mm (0.0165 to 0.0208 in.) Use 2 holes
0.53 to 0.68 mm (0.0208 to 0.0267 in.) Use 3 holes
ENGINE UNIT
Camshaft Circle runout Maximum 0.03 mm (0.00118 in.)
No. 2 camshaft Circle runout Maximum 0.03 mm (0.00118 in.)
CYLINDER HEAD
Intake valve Valve stem diameter Standard 4.92 mm (0.194 in.)
Exhaust valve Valve stem diameter Standard 4.92 mm (0.194 in.)
Intake valve seat Width Standard 1.2 mm (0.0472 in.)
Exhaust valve seat Width Standard 1.4 mm (0.0551 in.)
Camshaft clearance Thrust clearance Standard 0.033 to 0.150 mm (0.00129 to 0.00590 in.)
CYLINDER BLOCK
Cylinder bore Diameter O/S 0.25 78.250 to 78.252 mm (3.0807 to 3.0808 in.)
Standard 78.000 to 78.002 mm (3.0708 to 3.0709 in.)
Piston Piston diameter O/S 0.25 78.200 to 78.220 mm (3.0787 to 3.0795 in.)
Standard 77.950 to 77.970 mm (3.0689 to 3.0697 in.)
Oil clearance Standard 0.03 to 0.17 mm (0.0118 to 0.00669 in.)
Maximum More than 0.25 mm (0.00984 in.)
Piston ring Ring groove clearance No. 1 compression ring Standard 0.015 to 0.070 mm (0.00059 to 0.00276 in.)
No. 2 compression ring Standard 0.015 to 0.060 mm (0.00059 to 0.00236 in.)
Oil ring rail Standard 0.04 to 0.10 mm (0.00157 to 0.00394 in.)
End gap No. 1 compression ring Standard 0.20 to 0.40 mm (0.00787 to 0.0157 in.)
Maximum 0.95 mm (0.0374 in.)
No. 2 compression ring Standard 0.30 to 0.55 mm (0.0118 to 0.0217 in.)
Maximum 1.06 mm (0.0417 in.)
Oil ring rail Standard 0.10 to 0.40 mm (0.00394 to 0.0157 in.)
Maximum 0.82 mm (0.0322 in.)
Bush inside diameter Standard 26.023 to 26.031 mm (1.0245 to 1.0248 in.)
Crankshaft Thrust clearance Standard 0.06 to 0.25 mm (0.00236 to 0.00984 in.)
Oil clearance Main journal Standard 0.023 to 0.054 mm (0.000905 to 0.00212 in.)
Crank pin Standard 0.015 to 0.050 mm (0.000945 to 0.00196 in.)
Cylinder block main bearing journal diameter Standard Mark 1 54.984 to 54.990 mm (2.16472 to 2.16495 in.)
Mark 2 54.977 to 54.983 mm (2.16444 to 2.16468 in.)
Mark 3 54.971 to 54.976 mm (2.16420 to 2.16440 in.)
U/S 0.25 Mark 1 54.734 to 54.740 mm (2.15487 to 2.15511 in.)
Mark 2 54.727 to 54.733 mm (2.15460 to 2.15483 in.)
Mark 3 54.721 to 54.726 mm (2.15436 to 2.15456 in.)