1WW ENGINE MECHANICAL SERVICE DATA

Table 1. ENGINE
Engine idle speed		830 rpm
Maximum engine speed		3800 rpm
Compression	Standard pressure	1600 kPa (16.3 kgf/cm², 232 psi) or higher
	Difference between each cylinder	All cylinders almost same valve

Table 2. CYLINDER HEAD GASKET
Cylinder head gasket	Piston protrusion	Standard	0.420 to 0.680 mm (0.0165 to 0.0268 in.)

Table 3. ENGINE UNIT
Camshaft	Runout	0.03 mm (0.00118 in.)
No. 2 camshaft	Runout	0.03 mm (0.00118 in.)

Table 4. 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	Thrust clearance	Standard	0.033 to 0.150mm (0.00130 to 0.00591 in.)

Table 5. CYLINDER BLOCK
Connecting rod	Oil clearance		Standard	0.015 to 0.050 mm (0.000591 to 0.00197 in.)
Crankshaft	Thrust clearance		Standard	0.06 to 0.25 mm (0.00236 to 0.00984 in.)
Cylinder bore	Reference value (New parts)		STD	78.000 to 78.002 mm (3.07087 to 3.07094 in.)
Cylinder bore	Reference value (New parts)		O/S 0.25	78.250 to 78.252 mm (3.08071 to 3.08079 in.)
Piston	Oil clearance		New piston	0.03 to 0.17 mm (0.00118 to 0.00669 in.)
			Use piston	0.20 to 0.25 mm (0.00787 to 0.00984 in.)
			Maximum	0.25 mm (0.00984 in.)
Piston ring	Ring groove clearance	No. 1 compression spring	Standard	0.015 to 0.070 mm (0.00059 to 0.00276 in.)
		No. 2 compression spring	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 spring	Standard	0.20 to 0.40 mm (0.00787 to 0.0157 in.)
		No. 1 compression spring	Maximum	0.95 mm (0.0374 in.)
		No. 2 compression spring	Standard	0.30 to 0.55 mm (0.0118 to 0.0217 in.)
		No. 2 compression spring	Maximum	1.06 mm (0.0417 in.)
		Oil ring rail	Standard	0.10 to 0.40 mm (0.00394 to 0.0157 in.)
		Oil ring rail	Maximum	0.82 mm (0.0323 in.)
Crankshaft	Oil clearance		Standard	0.023 to 0.054 mm (0.000906 to 0.00213 in.)
Crankshaft main journal	Diameter	Mark 1	Standard	54.984 to 54.990 mm (2.16472 to 2.16496 in.)
		Mark 2	Standard	54.977 to 54.983 mm (2.16444 to 2.16469 in.)
		Mark 3	Standard	54.971 to 54.976 mm (2.16421 to 2.16441 in.)
	U/S 0.25	Mark 1	Standard	54.734 to 54.740 mm (2.15488 to 2.15511 in.)
		Mark 2	Standard	54.727 to 54.733 mm (2.15460 to 2.15484 in.)
		Mark 3	Standard	54.721 to 54.726 mm (2.15437 to 2.15457 in.)