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3.1L (GEN 2) Engine Specifications
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3.1L (Gen II) Engine Specifications
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General Data:
All dimensions are in millimeters |
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Type |
60 degree V6 |
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Displacement |
3.1L |
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RPO |
LH0 |
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Bore |
89.0 |
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Stroke |
84.0 |
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Deck Height |
224 |
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Compression Ratio |
8.8:1 |
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Firing Order |
1-2-3-4-5-6 |
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Oil Pressure |
69 kPa @500
RPM; 205-380 kPa @ 2000 RPM
(10 psi @ 500 RPM;
30-55 psi @ 2000R RPM) |
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Cylinder
Bore: |
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Diameter |
89.017-89.035 |
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Out of Round |
0.013 (Maximum) |
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Taper - Thrust
Side |
0.02 (Maximum) |
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Piston: |
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Clearance |
0.022-0.058 |
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Piston Ring: |
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COMPRESSION |
Groove Clearance
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Top |
0.051-0.089 |
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Second |
0.051-0.089 |
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Gap |
Top |
0.18-0.41 |
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Second |
0.51-0.71 |
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OIL |
Groove Clearance |
0.2(Maximum) |
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Gap |
0.25-0.76 |
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Piston Pin: |
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Diameter |
22.992-22.997
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Clearance |
0.010-0.020 |
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Fit in Rod |
0.018-0.046 |
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Crankshaft: |
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Main
Journal |
Diameter |
67.241-67.265 |
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Taper |
0.005 (Maximum) |
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Out Of Round |
0.005 (Maximum) |
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Main Bearing
Clearance |
0.032-0.077 |
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Crankshaft End
Play |
0.06-0.21 |
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Crankpin
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Diameter |
50.758-50.784 |
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Taper |
0.005 (Maximum) |
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Out of Round |
0.005 (Maximum) |
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Rod Bearing
Clearance |
0.028-0.086 |
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Rod Side
Clearance |
0.18-0.44 |
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Camshaft: |
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Lift |
Intake |
6.68 |
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Exhaust |
6.93 |
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Journal Diameter |
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Journals 1 & 4 |
51.03-51.08 |
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Journals 2 & 3 |
50.77-50.83 |
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Journal Clearance |
0.03-0.10 |
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Valve System: |
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Lifter |
Hydraulic |
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Rocker Arm Ratio |
1.50:1 |
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Valve
Lash |
Intake |
1-1/2 Turns Down from Zero Lash
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Exhaust |
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Face Angle
(Intake & Exhaust) |
45 degrees |
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Margin |
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Exhaust |
2.70 |
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Intake |
2.10 |
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Runout |
0.3 |
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Stem Clearance |
0.2-.0.53 |
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Valve
Spring |
Free Length |
48.5 |
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Pressure
N @ mm |
Closed |
391 @ 40 |
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Open |
867 @30 |
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Installed Height |
43 |
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Valve
Spring
Damper |
Free Length |
48.5 |
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Approx # of Coils |
4 |
Fastener Tightening Specifications
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Item |
Nm |
Ft Lbs |
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Camshaft Sprocket Bolt |
24 |
18 |
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Connecting Rod Cap Nut |
50 |
37 |
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Crankshaft Damper Bolt |
103 |
76 |
Cylinder Head Bolt (In Sequence) (apply thread sealant to
bolts) |
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First Pass |
45 |
33 |
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Final Pass |
Add 90 degrees |
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*Manifold Side*
6 2 3 7
5 1 4 8
* Outer Side *
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Exhaust Manifold Bolt |
28 |
21 |
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Flexplate/Flywheel Bolt |
83 |
61 |
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Front Timing Cover Case Bolt |
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Long |
45 |
35 |
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Short |
21 |
15 |
Intake Manifold
(In Sequence) |
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First Pass |
20 |
15 |
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Final Pass |
33 |
24 |
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Main Bearing Cap Bolt |
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First Pass |
50 |
37 |
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Final Pass |
Add 77 Degrees |
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Oil Filter Adapter |
39 |
29 |
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Oil Pan Rear Bolts |
25 |
18 |
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Oil Pan Bolt and Nut (Except Rear 2) |
6 |
7 |
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Oil Pump Bolt |
41 |
30 |
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Rocker Arm Nut |
27 |
20 |
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Rocker Arm Stud |
25 |
18 |
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Belt Tensioner |
54 |
40 |
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Throttle Body Bolts |
24 |
18 |
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Timing Chain Damper Bolt |
21 |
15 |
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Water Pump Pulley Bolt |
20 |
15 |
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Water Pump To Block Bolt |
24 |
18 |
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Water Pump To Front Cover Bolt |
8 |
10 |
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Exhaust Crossover Pipe Nut |
8 |
10 |
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Exhaust Heat Shield Nut |
8 |
10 |
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Valve Cover Bolt |
8 |
10 |
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