Download 11D - Road Race Engineering

11D-2
ENGINE OVERHAUL <2.4L ENGINE>
GENERAL SPECIFICATIONS
GENERAL SPECIFICATIONS
Item
Specifications
Engine model
4B12
Type
In-line OHV, DOHC
Number of cylinders
4
Combustion chamber
Pentroof type
Total displacement cm3 (cu in)
2,360 (144.0)
Cylinder bore mm (in)
88 (3.5)
Piston stroke mm (in)
97 (3.8)
Compression ratio
10.5
Valve timing
Intake valve
Exhaust valve
Open
0° BTDC −40° BTDC
Close
64° ABDC −24° ABDC
Open
44° BBDC −24° BBDC
Close
0° ATDC −20° ATDC
Auto lash adjuster
M1113000202593
Non-equipped
SERVICE SPECIFICATIONS
Item
M1113000302824
Standard value
Limit
Intake
0.20 ± 0.03 (0.008 ± 0.001)
−
Exhaust
0.30 ± 0.03 (0.012 ± 0.001)
−
44.1 (1.74)
43.6 (1.72)
45.0 (1.77)
44.5 (1.75)
0 −0.032 (0.013)
−
Distortion of cylinder head bottom mm (in)
Within 0.05 (0.002)
0.2 (0.008)
Grinding limit of cylinder head bottom mm (in)
−
0.2 (0.008)
Overall height of cylinder head mm (in)
128.5 (5.06)
−
Overall length of valve mm (in)
Intake
113.18 (4.456)
112.68 (4.436)
Exhaust
105.89 (4.169)
105.39 (4.149)
Intake
1.022 (0.0402)
0.522 (0.0206)
Exhaust
1.094 (0.0431)
0.594 (0.0234)
Free height of valve spring mm (in)
47.2 (1.858)
−
Squareness of valve spring
2° or less
4°
Timing chain
Valve clearance mm (in)
Camshaft
Cam height of camshaft mm (in) Intake
Exhaust
Camshaft oil clearance mm (in)
Cylinder head and valves
Valve margin mm (in)
TSB Revision