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3.7L Engine

WARNING: This page is about a different variant/trim than selected.
GENERAL SPECIFICATIONS

DESCRIPTION  SPECIFICATION 
Type 90° SOHC V6 12 Valve
Number of Cylinders 6
Firing Order 1-6-5-4-3-2
Lead Cylinder No. 1 Left Bank
Compression Ratio 9.6:1
Max. Variation Between Cylinders 25%
Metric  Standard 
Displacement 3.7 Liters 226 Cubic Inches
Bore 93.0 mm 3.66 in.
Stroke 90.8 mm 3.40 in.
Horsepower 211 @ 5200 RPM
Torque 236 ft. lbs. @ 4000 RPM
Compression Pressure 1172-1551 kPa 170-225 psi
CYLINDER BLOCK

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Bore Diameter 93.013 ± 0.0075 mm 3.6619 ± 0.0003 in.
Out of Round (MAX) 0.076 mm 0.003 in.
Taper (MAX) 0.051 mm 0.002 in.
PISTONS

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Diameter 92.975 mm 3.6605 in.
Weight 365.0 grams 12.87 oz
Ring Groove Diameter 
No. 1 85.37 - 83.13 mm 3.282 - 3.273 in
No. 2 82.833 - 83.033 mm 3.261 - 3.310 in.
No. 3 83.88 - 84.08 mm 3.302 - 3.310 in.
PISTON PINS

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Clearance In Piston 0.006 - 0.015 mm 0.0002 - 0.0005 in.
Diameter 24.017 - 24.020 mm 0.9455 - 0.9456 in.
PISTON RINGS

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Ring Gap 
Top Compression Ring 0.20 - 0.36 mm 0.0079 - 0.0142 in.
Second Compression Ring 0.37 - 0.63 mm 0.0146 - 0.0249 in.
Oil Control (Steel Rails) 0.25 - 0.76 mm 0.0099 - 0.30 in.
Side Clearance  -
Top Compression Ring 0.051 - 0.094 mm 0.0020 - 0.0037 in.
Second Compression Ring 0.040 - 0.080 mm 0.0016 - 0.0031 in.
Oil Ring (Steel Ring) 0.019 - 0.229 mm 0.0007 - 0.0091 in.
Ring Width 
Top Compression Ring 1.472 - 1.490 mm 0.057 - 0.058 in.
Second Compression Ring 1.472 - 1.490 mm 0.057 - 0.058 in.
Oil Ring (Steel Rails) 0.445 - 0.470 mm 0.017 - 0.018 in.
CONNECTING RODS

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Bearing Clearance 0.006 - 0.044 mm 0.0002 - 0.0017 in.
Side Clearance 0.10 - 0.35 mm 0.004 - 0.0138 in.
Piston Pin Clearance 0.015 - 0.028 mm 0.0006 - 0.0011 in.
Bearing Bore Out of Round (MAX) 0.004 mm 0.0002 in.
Total Weight (Less Bearing) 612 grams 21.588 ounces
CRANKSHAFT

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Main Bearing Journal Diameter 63.488 - 63.512 mm 2.4996 - 2.5005 in.
Bearing Clearance 0.002 - 0.046 mm 0.00008 - 0.0018 in.
Out of Round (MAX) 0.005 mm 0.0002 in.
Taper (MAX) 0.006 mm 0.0004 in.
End Play 0.052 - 0.282 mm 0.0021 - 0.0112 in.
End Play (MAX) 0.282 mm 0.0112 in.
Connecting Rod Journal Diameter 57.908 - 57.892 mm 2.2798 - 2.2792 in.
Bearing Clearance 0.006 - 0.044 0.0002 - 0.0011 in.
Out of Round (MAX) 0.005 mm 0.0002 in.
Taper (MAX) 0.006 mm 0.0002 in.
CAMSHAFT

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Bore Diameter 26.02 - 26.04 mm 1.0245 - 1.0252 in.
Bearing Journal Diameter 25.975 - 25.995 mm 1.0227 - 1.0235 in.
Bearing Clearance 0.025 - 0.065 mm 0.001 - 0.0026 in.
Bearing Clearance (MAX) 0.065 mm 0.0026 in.
End Play 0.075 -0.200 mm 0.003 - 0.0079 in.
End Play (MAX) 0.200 mm 0.0079 in.
VALVE TIMING

DESCRIPTION  SPECIFICATION 
Intake 
Opens (BTDC) 5.6°
Closes (ATDC) 240.1°
Duration 245.7°
Exhaust 
Opens (BTDC) 241.5°
Closes (ATDC) 20.1°
Duration 261.6°
Valve Overlap 25.7°
VALVES

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Face Angle 45° - 45.5°
Head Diameter 
Intake 48.52 - 48.78 mm 1.9103 - 1.9205 in.
Exhaust 36.87 - 37.13 mm 1.4516 - 1.4618 in.
Length (Overall) 
Intake 113.45 - 114.21 mm 4.4666 - 4.4965 in.
Exhaust 114.92 - 115.68 mm 4.5244 - 4.5543 in.
Stem Diameter 
Intake 6.931 - 6.957 mm 0.2729 - 0.2739 in.
Exhaust 6.902 - 6.928 mm 0.2717 - 0.2728 in.
Stem-to-Guide Clearance 
Intake 0.018 - 0.069 mm 0.0008 - 0.0028 in.
Exhaust 0.047 - 0.098 mm 0.0019 - 0.0039 in.
Max. Allowable Stem-to-Guide Clearance (Rocking Method) 
Intake 0.069 mm 0.0028 in.
Exhaust 0.098 mm 0.0039 in.
Valve Lift (Zero Lash) 
Intake 12.00 mm 0.472 in.
Exhaust 12.00 mm 0.472 in.
VALVE SPRING

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Free Length (Approx) 
Intake 48.18 mm 1.896 in.
Exhaust - w/damper 49.2 mm 1.973 in.
Spring Force (Valve Closed) 
Intake 332.0 - 368.0 N @ 40.12 mm 74.63 - 82.72 lbs. @ 1.5795 in.
Exhaust - (without damper) 356 - 394 N @ 39.12 mm 80.031 - 88.57 lbs. @ 1.54 in.
Spring Force (Valve Open) 
Intake 948.0 - 1038.0 N @ 28.12 mm 213.2 - 233.8 lbs. @ 1.107 in.
Exhaust - without damper 874 - 956 N @ 27.12 mm 196.5 - 214.9 lbs. @ 1.067 in.
Number of Coils  - -
Intake 7.30
Exhaust 7.15
Wire Diameter  - -
Intake 4.77 x 3.80 mm 0.1878 x 0.1496 in.
Exhaust 4.66 x 3.72 mm 0.1843 x.1464 in.
Installed Height (Spring Seat to Bottom of Retainer) 
Nominal 
Intake 40.12 mm 1.579 in.
Exhaust - w/damper 40.12 mm 1.579 in.
CYLINDER HEAD

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Gasket Thickness (Compressed) 0.7 mm (0.0276 in.)
Valve Seat Angle 44.5° - 45.0°
Valve Seat Runout (MAX) 0.051 mm 0.002 in.
Valve Seat Width 
Intake 1.75 - 2.36 mm 0.0698 - 0.0928 in.
Exhaust 1.71 - 2.32 mm 0.0673 - 0.0911 in.
Guide Bore Diameter (Std.) 6.975 - 7.00 mm 0.2747 - 0.2756 in.
Cylinder Head Warpage (Flatness) 0.0508 mm 0.002 in.
OIL PUMP

DESCRIPTION  SPECIFICATION 
Metric  Standard 
Clearance Over Rotors/End Face (MAX) 0.095 mm 0.0038 in.
Cover Out - of -Flat (MAX) 0.025 mm 0.001 in.
Inner and Outer Rotor Thickness 12.02 mm 0.4731 in.
Outer Rotor to pocket (Diametral) clearance (MAX) .235 mm 0.0093 in.
Outer Rotor Diameter (MIN) 85.925 mm 0.400 in.
Tip Clearance Between Rotors (MAX) 0.150 mm 0.006 in.
OIL PRESSURE

SPECIFICATION  SPECIFICATION 
Metric  Standard 
At Curb Idle Speed (MIN)* 25 kPa 4 psi
@ 3000 RPM 170 - 758 kPa 25 - 110 psi
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 RPM. 
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