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Dan
Dan, Auto Service Technician
Category: Car
Satisfied Customers: 3490
Experience:  GM ASEP A.A.S. 14 years GM experience. Mark of Excellence and Professional Guild awarded.
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firing order for 5.7 liter gmc truck

Resolved Question:

No Comment Added
Submitted: 8 years ago.
Category: Car
Expert:  Dan replied 8 years ago.
What year truck is this?
Customer: replied 8 years ago.
Reply to Dan's Post: 1997 GMC SIERRA 5.7 LITER
Expert:  Dan replied 8 years ago.
Engine Mechanical Specifications (5.7 L)

Application

Specification

Metric

English

General Data

  • Engine Type

V8

  • Displacement

5.7 L

350 CID

  • RPO (VIN Code)

L31 (R)

  • Bore

101.63 mm

4.0012 in

  • Stroke

88.39 mm

3.480 in

  • Compression Ratio

9.4:1

  • Firing Order

1-8-4-3-6-5-7-2

  • Spark Plug Gap

1.52 mm

0.060 in

  • Oil Pressure (Minimum at Normal Operating Temperature)

42 kPa at 1,000 RPM

125 kPa at 2,000 RPM

166 kPa at 4,000 RPM

6 psig at 1,000 RPM

18 psig at 2,000 RPM

24 psig at 4,000 RPM

Camshaft

  • End Play

0.05-0.30 mm

0.002-0.012 in

  • Journal Diameter

47.440-47.490 mm

1.8677-1.8697 in

  • Journal Diameter Out-of-Round

0.025 mm (Maximum)

0.0010 in (Maximum)

  • Lobe Lift (Exhaust)

7.20-7.30 mm

0.283-0.287 in

  • Lobe Lift (Intake)

6.97-7.07 mm

0.274-0.278 in

  • Runout

0.065 mm (Maximum)

0.0026 in (Maximum)

Connecting Rod

  • Connecting Rod Bearing Clearance (Production)

0.033-0.078 mm

0.0013-0.0031 in

  • Connecting Rod Bearing Clearance (Service)

0.025-0.063 mm

0.0010-0.0025 in

  • Connecting Rod Journal Diameter

53.304-53.334 mm

2.0986-2.0998 in

  • Connecting Rod Journal Out-of-Round (Production)

0.007 mm (Maximum)

0.0003 in (Maximum)

  • Connecting Rod Journal Out-of-Round (Service)

0.025 mm (Maximum)

0.0010 in (Maximum)

  • Connecting Rod Journal Taper (Production)

0.007 mm (Maximum)

0.0003 in (Maximum)

  • Connecting Rod Journal Taper (Service)

0.025 mm (Maximum)

0.0010 in (Maximum)

  • Connecting Rod Side Clearance

0.15-0.68 mm

0.006-0.027 in

Crankshaft

  • Crankshaft Bearing Clearance (Journal #1--Production)

0.018-0.053 mm

0.0007-0.0021 in

  • Crankshaft Bearing Clearance (Journal #2, #3, and #4--Production)

0.030-0.068 mm

0.0012-0.0027 in

  • Crankshaft Bearing Clearance (Journal #5--Production)

0.020-0.060 mm

0.0008-0.0024 in

  • Crankshaft Bearing Clearance (Journal #1--Service)

0.025-0.051 mm

0.0010-0.0020 in

  • Crankshaft Bearing Clearance (Journal #2, #3, and #4--Service)

0.025-0.064 mm

0.0010-0.0025 in

  • Crankshaft Bearing Clearance Service (Journal #5--Service)

0.038-0.063 mm

0.0015-0.0025 in

  • Crankshaft End Play

0.05-0.20 mm

0.002-0.008 in

  • Crankshaft Journal Diameter (Journal #1)

62.189-62.212 mm

2.4484-2.4493 in

  • Crankshaft Journal Diameter (Journal #2, #3, and #4)

62.181-62.207 mm

2.4481-2.4491 in

  • Crankshaft Journal Diameter (Journal #5)

62.185-62.207 mm

2.4482-2.4491 in

  • Crankshaft Journal Out-of-Round (Production)

0.005 mm (Maximum)

0.0002 in (Maximum)

  • Crankshaft Journal Out-of-Round (Service)

0.025 mm (Maximum)

0.0010 in (Maximum)

  • Crankshaft Journal Taper (Production)

0.005 mm (Maximum)

0.0002 in (Maximum)

  • Crankshaft Journal Taper (Service)

0.025 mm (Maximum)

0.0010 in (Maximum)

  • Crankshaft Runout at Rear Flange

0.038 mm

0.0015 in

Cylinder Bore

  • Diameter

101.618-101.643 mm

4.0007-4.0017 in

  • Out-of-Round (Production)

0.025 mm

0.0010 in

  • Out-of-Round (Service)

0.05 mm

0.002 in

  • Taper (Production--Relief Side)

0.025 mm

0.0010 in

  • Taper (Production--Thrust Side)

0.012 mm

0.0005 in

  • Taper (Service Limit)

0.025 mm

0.0010 in

Cylinder Head

  • Surface Flatness (Engine Block Deck)

0.10 mm

0.004 in

  • Surface Flatness (Exhaust Manifold Deck)

0.05 mm

0.002 in

  • Surface Flatness (Intake Manifold Deck)

0.10 mm

0.004 in

Exhaust Manifold

  • Surface Flatness (Flange to Flange)

0.25 mm

0.010 in

  • Surface Flatness (Individual Flange)

0.05 mm

0.002 in

Piston

  • Piston Bore Clearance (Production)

0.018-0.061 mm

0.0007-0.002 in

  • Piston Bore Clearance (Service)

0.018-0.068 mm

0.0007-0.0026 in

Piston Pin

  • Clearance in Piston (Production)

0.013-0.023 mm

0.0005-0.0009 in

  • Clearance in Piston (Service)

0.013-0.025 mm

0.0005-0.0010 in

  • Diameter

23.545-23.548 mm

0.9270-0.9271 in

  • Interference Fit in Connecting Rod

0.012-0.050 mm

0.0005-0.0019 in

Piston Rings (End Gap Measured in Cylinder Bore)

  • Piston Compression Ring Gap (Production--Top Groove)

0.25-0.40 mm

0.098-0.015 in

  • Piston Compression Ring Gap (Production--2nd Groove)

0.038-0.058 mm

0.0014-0.0022 in

  • Piston Compression Ring Gap (Service--Top Groove)

0.25-0.50 mm

0.009-0.019 in

  • Piston Compression Ring Gap (Service--2nd Groove)

0.038-0.058 mm

0.0014-0.0022 in

  • Piston Compression Ring Groove Clearance (Production--Top Groove)

0.030-0.070 mm

0.0012-0.0027 in

  • Piston Compression Ring Groove Clearance (Production--2nd Groove)

0.040-0.080 mm

0.0015-0.003 in

  • Piston Compression Ring Groove Clearance (Service Limit--Top Groove)

0.030-0.090 mm

0.0012-0.0035 in

  • Piston Compression Ring Groove Clearance (Service Limit--2nd Groove)

0.040-0.100 mm

0.0015-0.0040 in

  • Piston Oil Ring Gap (Production)

0.25-0.76 mm

0.009-0.029 in

  • Piston Oil Ring Gap (Service)

0.25-0.90 mm

0.009-0.035 in

  • Piston Oil Ring Groove Clearance (Production)

0.046-0.196 mm

0.0018-0.0077 in

  • Piston Oil Ring Groove Clearance (Service)

0.046-0.200 mm

0.0018-0.0078 in

Valve System

  • Valve Face Angle

45 degrees

  • Valve Head Edge Margin

0.79 mm (Minimum)

0.031 in (Minimum)

  • Valve Lash

Rotate the Valve Rocker Arm Nut Clockwise 360 degrees (1 Turn) from Zero Lash

  • Valve Lifter

Hydraulic Roller

  • Valve Rocker Arm Ratio

1.5:1

  • Valve Seat Angle

46 degrees

  • Valve Seat Runout

0.05 mm (Maximum)

0.002 in (Maximum)

  • Valve Seat Width (Exhaust--Heavy Duty)

1.50-2.56 mm

0.059-0.101 in

  • Valve Seat Width (Exhaust--Light Duty)

1.65-2.49 mm

0.065-0.098 in

  • Valve Seat Width (Intake)

1.02-1.65 mm

0.040-0.065 in

  • Valve Spring Free Length

51.3 mm

2.02 in

  • Valve Spring Installed Height (Exhaust)

42.92-43.43 mm

1.67-1.70 in

  • Valve Spring Installed Height (Intake)

42.92-43.43 mm

1.67-1.70 in

  • Valve Spring Pressure (Closed)

338-374 N at 43.2

76-84 lb at 1.70

  • Valve Spring Pressure (Open)

832-903 N at 32.3

187-203 lb at 1.27

  • Valve Stem Clearance (Exhaust--Production)

0.025-0.069 mm

0.0010-0.0027 in

  • Valve Stem Clearance (Intake--Production)

0.025-0.069 mm

0.0010-0.0027 in

  • Valve Stem Clearance (Exhaust--Service)

0.025-0.094 mm

0.0010-0.0037 in

  • Valve Stem Clearance (Intake--Service)

0.025-0.094 mm

0.0010-0.0037 in

  • Valve Stem Diameter

8.661-8.679 mm

0.3410-0.3416 in

  • Valve Stem Oil Seal Installed Height (Measured from the Top of the Large Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal)

1-2 mm

0.03937-0.07874 in

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