Engine Electrical (R18A1, R18A3 engines)
Item Measurement Qualification Standard or New Service Limit 
Ignition coil Rated voltage  12 V 
Firing order  1-3-4-2 
Spark plug Type  NGK: IZFR6K11S
DENSO: SKJ20DR-M11S 
Gap  1.0-1.1 mm (0.039-0.043 in.) ——— 
Ignition timing At idle
Check the red mark 
M/T (in neutral) 8±2 ° BTDC 
A/T (in N or P position) 8±2 ° BTDC 
Drive belt Tension  Auto-tensioner 
Alternator Output At 13.5 V and normal engine temperature 90 A 
Coil (rotor) resistance At 20 °C (68 °F) 1.84-2.10 W 
Slip ring O.D.  22.7 mm (0.89 in.) 21.2 mm (0.83 in.) 
Brush length  19.0 mm (0.75 in.) 5.0 mm (0.20 in.) 
Brush spring tension  3.3-4.1 N (0.34-0.42 kgf, 0.75-0.93 lbf) 
Starter Output  1.0 kW 
Commutator mica depth  0.50-0.80 mm (0.020-0.031 in.) 0.2 mm (0.008 in.) 
Commutator runout  0.02 mm (0.001 in.) max. 0.05 mm (0.002 in.) 
Commutator O.D.  28.0 mm (1.10 in.) 27.0 mm (1.06 in.) 
Brush length  14.0-14.5 mm (0.55-0.57 in.) 9.0 mm (0.35 in.) 
Brush spring tension  13.7-17.7 N (1.40-1.80 kgf, 3.09-3.97 lbf) 

Engine Electrical (K20Z2 engine)
Item Measurement Qualification Standard or New Service Limit 
Ignition coil Rated voltage  12 V 
Firing order  1-3-4-2 
Spark plug Type  NGK: IZFR6K11
DENSO: SKJ20DR-M11 
Gap  1.0-1.1 mm (0.039-0.043 in.) ——— 
Ignition timing At idle
Check the red mark 
M/T (in neutral) 8±2 ° BTDC 
A/T (in N or P position) 8±2 ° BTDC 
Drive belt Tension  Auto-tensioner 
Alternator Output At 13.5 V and normal engine temperature 105 A 
Coil (rotor) resistance At 20 °C (68 °F) 3.2-4.0 W 
Slip ring O.D.  14.4 mm (0.57 in.) 14.0 mm (0.55 in.) 
Brush length  10.5 mm (0.41 in.) 1.5 mm (0.06 in.) 
Brush spring tension  3.2 N (0.33 kgf, 0.7 lbf) 
Starter Output  1.0 kW 
Commutator mica depth  0.50-0.80 mm (0.020-0.031 in.) 0.2 mm (0.008 in.) 
Commutator runout  0.02 mm (0.001 in.) max. 0.05 mm (0.002 in.) 
Commutator O.D.  28.0 mm (1.10 in.) 27.0 mm (1.06 in.) 
Brush length  14.0-14.5 mm (0.55-0.57 in.) 9.0 mm (0.35 in.) 
Brush spring tension  13.7-17.7 N (1.40-1.80 kgf, 3.09-3.97 lbf) 

Engine Assembly (R18A1, R18A3 engines)
Item Measurement Qualification Standard or New Service Limit 
Compression Pressure
Check the engine with the starter cranking 
Minimum 880 kPa (9.0 kgf/cm2, 128 psi) ——— 
Maximum variation 200 kPa (2.0 kgf/cm2, 28 psi) ——— 

Engine Assembly (K20Z2 engine)
Item Measurement Qualification Standard or New Service Limit 
Compression Pressure
Check the engine with the starter cranking 
Minimum 930 kPa (9.5 kgf/cm2, 135 psi) ——— 
Maximum variation 200 kPa (2.0 kgf/cm2, 28 psi) ——— 

Cylinder Head (R18A1, R18A3 engines)
Item Measurement Qualification Standard or New Service Limit 
Head Warpage  ——— 0.08 mm (0.003 in.) 
Height  114.95-115.05 mm (4.526-4.530 in.) ——— 
Camshaft End play  0.05-0.25 mm (0.002-0.010 in.) 0.4 mm (0.02 in.) 
Camshaft-to-holder oil clearance  0.045-0.084 mm (0.0018-0.0033 in.) 0.15 mm (0.006 in.) 
Total runout  0.03 mm (0.001 in.) max. 0.04 mm (0.002 in.) 
Cam lobe height Intake, primary 35.754 mm (1.4076 in.) ——— 
Intake,
secondary A 
35.358 mm (1.3920 in.) ——— 
Intake,
secondary B 
36.027 mm (1.4184 in.) ——— 
Exhaust 35.813 mm (1.4100 in.) ——— 
Valve Clearance (cold) Intake 0.20±0.02 mm (0.008±0.0008 in.) ——— 
Exhaust 0.25±0.02 mm (0.010±0.0008 in.) ——— 
Stem O.D. Intake 5.48-5.49 mm (0.2157-0.2161 in.) 5.45 mm (0.215 in.) 
Exhaust 5.45-5.46 mm (0.2146-0.2150 in.) 5.42 mm (0.213 in.) 
Stem-to-guide clearance Intake 0.02-0.05 mm (0.0008-0.0020 in.) 0.08 mm (0.003 in.) 
Exhaust 0.05-0.08 mm (0.0020-0.0031 in.) 0.11 mm (0.004 in.) 
Valve seat Width Intake 0.85-1.15 mm (0.033-0.045 in.) 1.6 mm (0.06 in.) 
Exhaust 1.25-1.55 mm (0.049-0.061 in.) 2.0 mm (0.08 in.) 
Stem installed height Intake 67.2-67.4 mm (2.646-2.654 in.) 67.7 mm (2.665 in.) 
Exhaust 58.4-58.6 mm (2.299-2.307 in.) 58.9 mm (2.319 in.) 
Valve spring Free length Intake 55.31 mm (2.178 in.) ——— 
Exhaust 56.97 mm (2.243 in.) ——— 
Valve guide I.D. Intake 5.51-5.53 mm (0.217-0.218 in.) 5.55 mm (0.219 in.) 
Exhaust 5.51-5.53 mm (0.217-0.218 in.) 5.55 mm (0.219 in.) 
Installed height Intake 18.25-18.75 mm (0.719-0.738 in.) ——— 
Exhaust 18.25-18.75 mm (0.719-0.738 in.) ——— 
Rocker arm Arm-to-shaft clearance Intake 0.019-0.050 mm (0.0007-0.0020 in.) 0.08 mm (0.0031 in.) 
Exhaust 0.019-0.050 mm (0.0007-0.0020 in.) 0.08 mm (0.0031 in.) 

Cylinder Head (K20Z2 engine)
Item Measurement Qualification Standard or New Service Limit 
Head Warpage  ——— 0.05 mm (0.002 in.) 
Height  103.95-104.05 mm (4.093-4.096 in.) ——— 
Camshaft End play  0.05-0.20 mm (0.002-0.008 in.) 0.4 mm (0.02 in.) 
Camshaft-to-holder oil clearance No. 1 journal 0.030-0.069 mm (0.001-0.003 in.) 0.15 mm (0.006 in.) 
No. 2, 3, 4, 5 journals 0.060-0.099 mm (0.002-0.004 in.) 0.15 mm (0.006 in.) 
Total runout  0.03 mm (0.001 in.) max. 0.04 mm (0.002 in.) 
Cam lobe height Intake, primary 34.263 mm (1.3489 in.) ——— 
Intake, secondary 29.638 mm (1.1668 in.) ——— 
Exhaust 34.092 mm (1.3422 in.) ——— 
Valve Clearance (cold) Intake 0.23±0.02 mm (0.009±0.0008 in.) ——— 
Exhaust 0.30±0.02 mm (0.012±0.0008 in.) ——— 
Stem O.D. Intake 5.475-5.485 mm (0.2156-0.2159 in.) 5.445 mm (0.214 in.) 
Exhaust 5.450-5.460 mm (0.2146-0.2150 in.) 5.420 mm (0.213 in.) 
Stem-to-guide clearance Intake 0.030-0.055 mm (0.0012-0.0022 in.) 0.08 mm (0.003 in.) 
Exhaust 0.055-0.080 mm (0.0022-0.0031 in.) 0.11 mm (0.004 in.) 
Valve seat Width Intake 1.25-1.55 mm (0.049-0.061 in.) 2.00 mm (0.079 in.) 
Exhaust 1.25-1.55 mm (0.049-0.061 in.) 2.00 mm (0.079 in.) 
Stem installed height Intake 44.0-44.5 mm (1.73-1.75 in.) 44.7 mm (1.76 in.) 
Exhaust 44.1-44.6 mm (1.74-1.76 in.) 44.8 mm (1.76 in.) 
Valve spring Free length Intake NIPPON HATSUJO:
47.57 mm (1.8728 in.) 
——— 
CHUO HATSUJO:
47.58 mm (1.8732 in.) 
Exhaust NIPPON HATSUJO:
49.64 mm (1.954 in.) 
——— 
CHUO HATSUJO:
49.63 mm (1.954 in.) 
Valve guide I.D. Intake 5.515-5.530 mm (0.2171-0.2177 in.) 5.55 mm (0.219 in.) 
Exhaust 5.515-5.530 mm (0.2171-0.2177 in.) 5.55 mm (0.219 in.) 
Installed height Intake 15.2-16.2 mm (0.598-0.638 in.) ——— 
Exhaust 15.5-16.5 mm (0.610-0.650 in.) ——— 
Rocker arm Arm-to-shaft clearance Intake 0.025-0.052 mm (0.0010-0.0020 in.) 0.08 mm (0.003 in.) 
Exhaust 0.018-0.056 mm (0.0007-0.0022 in.) 0.08 mm (0.003 in.) 

Engine Block (R18A1, R18A3 engines)
Item Measurement Qualification Standard or New Service Limit 
Block Warpage of deck  0.07 mm (0.003 in.) max. 0.10 mm (0.004 in.) 
Bore diameter  81.000-81.015 mm (3.1890-3.1896 in.) 81.070 mm (3.1917 in.) 
Bore taper  ——— 0.05 mm (0.002 in.) 
Reboring limit  ——— 0.25 mm (0.01 in.) 
Piston Skirt O.D. at 14 mm (0.55 in.) from bottom of skirt  80.980-80.990 mm (3.1881-3.1886 in.) 80.98 mm (3.186 in.) 
Clearance in cylinder  0.010-0.035 mm (0.0004-0.0014 in.) 0.05 mm (0.002 in.) 
Ring groove width Top 1.23-1.24 mm (0.048-0.049 in.) 1.26 mm (0.050 in.) 
Second 1.22-1.23 mm (0.047-0.048 in.) 1.25 mm (0.049 in.) 
Oil 2.005-2.020 mm (0.0789-0.0795 in.) 2.05 mm (0.081 in.) 
Piston ring Ring-to-groove clearance Top 0.045-0.070 mm (0.0018-0.0028 in.) 0.13 mm (0.005 in.) 
Second 0.035-0.060 mm (0.0014-0.0024 in.) 0.13 mm (0.005 in.) 
Ring end gap Top 0.20-0.35 mm (0.008-0.014 in.) 0.60 mm (0.024 in.) 
Second 0.40-0.55 mm (0.016-0.022 in.) 0.70 mm (0.028 in.) 
Oil 0.20-0.70 mm (0.008-0.028 in.) 0.80 mm (0.031 in.) 
Piston pin O.D.  19.960-19.964 mm (0.7858-0.7860 in.) 19.960 mm (0.7858 in.) 
Pin-to-piston clearance  -0.004 to +0.003 mm
(-0.00016 to +0.00012 in.) 
0.006 mm (0.0002 in.) 
Connecting rod Pin-to-rod clearance  0.005-0.015 mm (0.0002-0.0006 in.) 0.02 mm (0.0008 in.) 
Small-end bore diameter  19.969-19.975 mm (0.7862-0.7864 in.) ——— 
Large-end bore diameter  48.0 mm (1.89 in.) ——— 
End play installed on crankshaft  0.15-0.35 mm (0.006-0.014 in.) 0.45 mm (0.018 in.) 
Crankshaft Main journal diameter  54.976-55.000 mm (2.1644-2.1654 in.) ——— 
Rod journal diameter  44.976-45.000 mm (1.7707-1.7716 in.) ——— 
Rod/main journal taper  0.005 mm (0.0002 in.) max. 0.010 mm (0.0004 in.) 
Rod/main journal out-of-round  0.005 mm (0.0002 in.) max. 0.010 mm (0.0004 in.) 
End play  0.10-0.35 mm (0.004-0.014 in.) 0.45 mm (0.018 in.) 
Runout  0.03 mm (0.0012 in.) max. 0.04 mm (0.0016 in.) 
Crankshaft
bearing 
Main bearing-to-journal oil clearance  0.018-0.034 mm (0.0007-0.0013 in.) 0.045 mm (0.0018 in.) 
Rod bearing clearance  0.024-0.042 mm (0.0009-0.0017 in.) 0.055 mm (0.0022 in.) 

Engine Block (K20Z2 engine)
Item Measurement Qualification Standard or New Service Limit 
Block Warpage of deck  0.07 mm (0.003 in.) max. 0.10 mm (0.004 in.) 
Bore diameter A or l 86.010-86.020 mm (3.3862-3.3866 in.) 86.070 mm (3.3886 in.) 
B or II 86.000-86.010 mm (3.3858-3.3862 in.) 86.070 mm (3.3886 in.) 
Bore taper  ——— 0.05 mm (0.002 in.) 
Reboring limit  ——— 0.25 mm (0.01 in.) 
Piston Skirt O.D. at 11 mm (0.4 in.) from bottom of skirt No letter or A 85.980-85.990 mm (3.3850-3.3854 in.) 85.930 mm (3.3831 in.) 
Letter B 85.970-85.980 mm (3.3846-3.3850 in.) 85.920 mm (3.3827 in.) 
Clearance in cylinder  0.020-0.040 mm (0.0008-0.0016 in.) 0.05 mm (0.002 in.) 
Ring groove width Top 1.220-1.230 mm (0.0481-0.0484 in.) 1.25mm (0.049 in.) 
Second 1.220-1.230 mm (0.0481-0.0484 in.) 1.25mm (0.049 in.) 
Oil 2.005-2.025 mm (0.0789-0.0797 in.) 2.05mm (0.081 in.) 
Piston ring Ring-to-groove clearance Top 0.035-0.060 mm (0.0014-0.0023 in.) 0.13 mm (0.005 in.) 
Second 0.030-0.055 mm (0.0012-0.0022 in.) 0.13 mm (0.005 in.) 
Ring end gap Top 0.20-0.35 mm (0.008-0.014 in.) 0.60 mm (0.024 in.) 
Second 0.40-0.55 mm (0.016-0.022 in.) 0.70 mm (0.028 in.) 
Oil 0.20-0.70 mm (0.008-0.028 in.) 0.80 mm (0.031 in.) 
Piston pin O.D.  21.961-21.965 mm (0.8646-0.8648 in.) 21.953 mm (0.8643 in.) 
Pin-to-piston clearance  -0.005 to +0.002 mm
(-0.00020 to +0.00008 in.) 
0.005 mm (0.0002 in.) 
Connecting rod Pin-to-rod clearance  0.005-0.015 mm (0.0002-0.0006 in.) 0.02 mm (0.0008 in.) 
Small-end bore diameter  21.970-21.976 mm (0.8650-0.8652 in.) ——— 
Large-end bore diameter  48.0 mm (1.89 in.) ——— 
End play installed on crankshaft  0.15-0.30 mm (0.006-0.012 in.) 0.40 mm (0.016 in.) 
Crankshaft Main journal diameter No. 1 journal
No. 2 journal
No. 4 journal
No. 5 journal 
54.984-55.008 mm (2.1648-2.1657 in.) ——— 
No. 3 journal 54.976-55.000 mm (2.1644-2.1654 in.) ——— 
Rod journal diameter  44.976-45.000 mm (1.7707-1.7717 in.) ——— 
Rod/main journal taper  0.005 mm (0.0002 in.) max. 0.010 mm (0.0004 in.) 
Rod/main journal out-of-round  0.005 mm (0.0002 in.) max. 0.010 mm (0.0004 in.) 
End play  0.10-0.35 mm (0.004-0.014 in.) 0.45 mm (0.018 in.) 
Runout  0.03 mm (0.0012 in.) max. 0.04 mm (0.0016 in.) 
Crankshaft
bearing 
Main bearing-to-journal oil clearance No. 1 journal
No. 2 journal
No. 4 journal
No. 5 journal 
0.017-0.041 mm (0.0007-0.0016 in.) 0.050 mm (0.0020 in.) 
No. 3 journal 0.025-0.049 mm (0.0010-0.0019 in.) 0.055 mm (0.0022 in.) 
Rod bearing clearance  0.020-0.050 mm (0.0008-0.0020 in.) 0.060 mm (0.0024 in.) 

Engine Lubrication (R18A1, R18A3 engines)
Item Measurement Qualification Standard or New Service Limit 
Engine oil Capacity Engine overhaul 4.5 L (4.8 US qt, 4.0 Imp qt) 
Oil change, including filter 3.7 L (3.9 US qt, 3.3 Imp qt) 
Oil change, without filter 3.5 L (3.7 US qt, 3.1 Imp qt) 
Oil pump Inner-to-outer rotor clearance  0.02-0.16 mm (0.001-0.006 in.) 0.20 mm (0.008 in.) 
Pump housing-to-outer rotor clearance  0.100-0.175 mm (0.0039-0.0069 in.) 0.20 mm (0.008 in.) 
Pump housing-to-outer rotor axial clearance  0.02-0.07 mm (0.001-0.003 in.) 0.12 mm (0.005 in.) 
Oil pressure with oil temperature at 80 °C (176 °F) At idle 70 kPa (0.7 kgf/cm2, 10 psi) 
At 3,000 rpm (min-1340 kPa (3.5 kgf/cm2, 50 psi) 

Engine Lubrication (K20Z2 engine)
Item Measurement Qualification Standard or New Service Limit 
Engine oil Capacity Engine overhaul 5.3 L (5.6 US qt, 4.7 Imp qt) 
Oil change, including filter 4.2 L (4.4 US qt, 3.7 Imp qt) 
Oil change, without filter 4.0 L (4.2 US qt, 3.5 Imp qt) 
Oil pump Inner-to-outer rotor clearance  0.06-0.16 mm (0.002-0.006 in.) 0.20 mm (0.008 in.) 
Pump housing-to-outer rotor clearance  0.15-0.21 mm (0.006-0.008 in.) 0.23 mm (0.009 in.) 
Pump housing-to-rotor axial clearance  0.035-0.070 mm (0.0013-0.0028 in.) 0.12 mm (0.005 in.) 
Balancer shafts, journal diameter No. 1 journal, front shaft 19.938-19.950 mm (0.7850-0.7854 in.) 19.92 mm (0.784 in.) 
No. 1 journal, rear shaft 23.938-23.950 mm (0.9424-0.9429 in.) 23.92 mm (0.942 in.) 
No. 2 journal, front and rear shaft 32.949-32.961 mm (1.2972-1.2977 in.) 32.93 mm (1.296 in.) 
Balancer shafts, journal taper  0.005 mm (0.0002 in.) max. ——— 
Balancer shafts, end play Front 0.063-0.108 mm (0.0025-0.0043 in.) 0.14 mm (0.0055 in.) 
Rear 0.063-0.108 mm (0.0025-0.0043 in.) 0.14 mm (0.0055 in.) 
Balancer shafts, shaft-to-bearing clearance No. 1 journal, front shaft 0.050-0.082 mm (0.0020-0.0032 in.) 0.10 mm (0.004 in.) 
No. 1 journal, rear shaft 0.050-0.082 mm (0.0020-0.0032 in.) 0.10 mm (0.004 in.) 
No. 2 journal, front and rear shaft 0.060-0.120 mm (0.0024-0.0047 in.) 0.15 mm (0.006 in.) 
Balancer shaft bearings, I.D. No. 1 journal, front shaft 20.000-20.020 mm (0.7874-0.7882 in.) 20.03 mm (0.789 in.) 
No. 1 journal, rear shaft 24.000-24.020 mm (0.9449-0.9457 in.) 24.03 mm (0.946 in.) 
No. 2 journal, front and rear shaft 33.021-33.069 mm (1.3000-1.3019 in.) 33.09 mm (1.303 in.) 
Relief valve, oil pressure with oil temperature at 80 °C (176 °F) At idle 70 kPa (0.7 kgf/cm2, 10 psi) min. 
At 3,000 rpm (min-1300 kPa (3.1 kgf/cm2, 44 psi) min. 

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