Engine Mechanical - 5.0L & 5.7L (Unit Repair): Specifications

Fastener Tightening Specifications

Application	Specification
Application	Metric	English
Accelerator Control Cable Bracket Bolt and Nut	12 N.m	106 lb in
Belt Idler Pulley Bolt	50 N.m	37 lb ft
Camshaft Retainer Bolt	21-29 N.m	15-21 lb ft
Camshaft Sprocket Bolt	30-40 N.m	22-30 lb ft
Connecting Rod Nut
First Pass	27 N.m	20 lb ft
Final Pass	70 degrees
Crankshaft Balancer Bolt	95 N.m	70 lb ft
Crankshaft Bearing Cap Bolt and Stud - Preferred Method
First Pass - Two Bolt Type Bearing Cap	20 N.m	15 lb ft
Final Pass - Two Bolt Type Bearing Cap	73 degrees
First Pass - Four Bolt Type Bearing Cap	20 N.m	15 lb ft
Final Pass Outboard Bolt - Four Bolt Type Bearing Cap	43 degrees
Final Pass Inboard Bolt and Stud - Four Bolt Type Bearing Cap	73 degrees
Crankshaft Bearing Cap Bolt and Stud - Optional Strategy
Two Bolt Type Bearing Cap	105 N.m	77 lb ft
Inboard Bolt and Stud - Four Bolt Type Bearing Cap	105 N.m	77 lb ft
Outboard Bolt - Four Bolt Type Bearing Cap	90 N.m	66 lb ft
Crankshaft Oil Deflector Nut	40 N.m	30 lb ft
Crankshaft Position Sensor Bolt	9 N.m	80 lb in
Crankshaft Pulley Bolt	58 N.m	43 lb ft
Crankshaft Rear Oil Seal Housing Nut and Bolt	12 N.m	106 lb in
Crankshaft Rear Oil Seal Housing Retainer Stud	6 N.m	53 lb in
Cylinder Head Bolt - Preferred Method
All Bolts First Pass in Sequence	30 N.m	22 lb ft
Long Bolt Final Pass in Sequence	75 degrees
Medium Bolt Final Pass in Sequence	65 degrees
Short Bolt Final Pass in Sequence	55 degrees
Cylinder Head Bolt - Optional On-Vehicle Strategy
First Pass in Sequence	35 N.m	26 lb ft
Second Pass in Sequence	60 N.m	44 lb ft
Final Pass in Sequence	90 N.m	66 lb ft
Cylinder Head Core Hole Plug	20 N.m	15 lb ft
Distributor Cap Bolt	2.4 N.m	21 lb in
Distributor Clamp Bolt	25 N.m	18 lb ft
Drive Belt Tensioner Bolt	50 N.m	37 lb ft
EGR Valve Bolt
First Pass	10 N.m	89 lb in
Final Pass	30 N.m	22 lb ft
EGR Valve Pipe Nut at Intake Manifold	25 N.m	18 lb ft
EGR Valve Pipe Nut at Exhaust Manifold	30 N.m	22 lb ft
EGR Valve Pipe Clamp Bracket Bolt	25 N.m	18 lb ft
Engine Block Coolant Drain Hole Plug	20 N.m	15 lb ft
Engine Block Oil Gallery Plug	20 N.m	15 lb ft
Engine Coolant Temperature (ECT) Gage Sensor	20 N.m	15 lb ft
Engine Flywheel Bolt	100 N.m	74 lb ft
Engine Front Cover Bolt	12 N.m	106 lb in
Engine Lift Front Bracket Stud	35 N.m	26 lb ft
Engine Mount Bolt to Engine Mount Bracket Through-bolt	95 N.m	70 lb ft
Engine Mount Bolt to Engine Mount Frame Bracket	58 N.m	43 lb ft
Engine Mount Bracket Bolt to Engine	54 N.m	40 lb ft
Engine Mount Bracket Bolt to Frame	45 N.m	33 lb ft
Engine Mount Heat Shield to Engine Mount Bracket	6 N.m	53 lb in
Engine Mount Nut Through-bolt	68 N.m	50 lb ft
Engine Oil Pressure Gage Sensor	30 N.m	22 lb ft
Engine Oil Pressure Gage Sensor Fitting - Plus Required Angle	15 N.m	11 lb ft
Engine Wiring Harness Bracket Nut	12 N.m	106 lb in
Evaporative Emission (EVAP) Canister Purge Solenoid Valve Stud	10 N.m	89 lb in
Exhaust Manifold Bolt
First Pass	15 N.m	11 lb ft
Final Pass	30 N.m	22 lb ft
Fan and Water Pump Pulley Bolt	25 N.m	18 lb ft
Fuel Pipe Bracket Bolt	6 N.m	53 lb in
Fuel Pipe Retainer Nut	3 N.m	27 lb in
Generator and Drive Belt Tensioner Bracket Bolt and Nut to Engine	41 N.m	30 lb ft
Generator and Drive Belt Tensioner Bracket Stud to Engine	20 N.m	15 lb ft
Ignition Coil Stud	12 N.m	106 lb in
Knock Sensor	20 N.m	15 lb ft
Lower Intake Manifold Bolt
First Pass in Sequence	3 N.m	27 lb in
Second Pass in Sequence	12 N.m	106 lb in
Final Pass in Sequence	15 N.m	11 lb ft
Oil Filter Adapter Bolt	25 N.m	18 lb ft
Oil Filter Fitting	35 N.m	26 lb ft
Oil Level Indicator Tube Bolt	25 N.m	18 lb ft
Oil Pan Drain Plug	25 N.m	18 lb ft
Oil Pan Stud	6 N.m	53 lb in
Oil Pan Stud Nut	25 N.m	18 lb ft
Oil Pan Bolt or Stud	12 N.m	106 lb in
Oil Pump Bolt to Rear Crankshaft Bearing Cap
First Pass	20 N.m	15 lb ft
Final Pass	65 degrees
Oil Pump Cover Bolt	12 N.m	106 lb in
Power Steering Pump Bolt	50 N.m	37 lb ft
Power Steering Pump Bracket Bolt to Engine	41 N.m	30 lb ft
Power Steering Pump Bracket Stud to Engine	20 N.m	15 lb ft
Power Steering Pump Bracket Stud Nut	41 N.m	30 lb ft
Power Steering Pump Nut to Engine	41 N.m	30 lb ft
Power Steering Pump Rear Bracket Nut	50 N.m	37 lb ft
Spark Plug
Initial Installation - NEW Cylinder Head	30 N.m	22 lb ft
All Subsequent Installations	15 N.m	11 lb ft
Spark Plug Wire Support Bolt	12 N.m	106 lb in
Square Socket Plug - Engine Block Oil Gallery	20 N.m	15 lb ft
Throttle Body Stud	9 N.m	80 lb in
Transmission Cover Bolt	12 N.m	106 lb in
Upper Intake Manifold Stud
First Pass	5 N.m	44 lb in
Final Pass	10 N.m	89 lb in
Valve Lifter Guide Retainer Bolt	25 N.m	18 lb ft
Valve Rocker Arm Cover Bolt	12 N.m	106 lb in
Water Outlet Stud	25 N.m	18 lb ft
Water Pump Bolt	45 N.m	33 lb ft

FASTENER TIGHTENING SPECIFICATIONS

Engine Mechanical Specifications (5.0 L)

Application		Specification
Application		Metric	English
General Data
	Engine Type	V8
	Displacement	5.0 L	305 CID
	RPO - VIN Code	L30 (M)
	Bore	94.89 mm	3.737 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
		42 kPa at 1,000 RPM	6 psig at 1,000 RPM
	Oil Pressure - Minimum at Normal Operating Temperature	125 kPa at 2,000 RPM	18 psig at 2,000 RPM
		166 kPa at 4,000 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	0.0010 in
	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	56.505-56.533 mm	2.2246-2.2257 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	0.15-0.61 mm	0.006-0.024 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 - 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	94.894-94.947 mm	3.7360-3.7381 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	0.0007-0.0024 in
	Piston Bore Clearance - Service	0.018-0.068 mm	0.0007-0.0026 in
Piston Pin
	Clearance in Piston - Production	0.010-0.020 mm	0.0004-0.0008 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	0.0004-0.0019 in
Piston Rings - End Gap Measured in Cylinder Bore
	Piston Compression Ring Gap - Production - Top Groove	0.25-0.51 mm	0.010-0.020 in
	Piston Compression Ring Gap - Production - 2nd Groove	0.46-0.66 mm	0.018-0.026 in
	Piston Compression Ring Gap - Service - Top Groove	0.25-0.65 mm	0.010-0.025 in
	Piston Compression Ring Gap - Service - 2nd Groove	0.46-0.90 mm	0.018-0.035 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	0.030-0.074 mm	0.0012-0.003 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	0.030-0.090 mm	0.0012-0.0040 in
	Piston Oil Ring Gap - Production	0.25-0.76 mm	0.010-0.030 in
	Piston Oil Ring Gap - Service	0.25-0.89 mm	0.010-0.035 in
	Piston Oil Ring Groove Clearance - Production	0.051-0.203 mm	0.002-0.008 in
	Piston Oil Ring Groove Clearance - Service	0.051-0.22 mm	0.002-0.009 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 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	1.65-2.49 mm	0.065-0.098 in
	Valve Seat Width - Intake	1.14-1.78 mm	0.045-0.070 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 mm	76-84 lb at 1.70 in
	Valve Spring Pressure - Open	832-903 N at 32.3 mm	187-203 lb at 1.27 in
	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 Diameter Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal	1-2 mm	0.03937-0.07874 in

ENGINE MECHANICAL SPECIFICATIONS (5.0 L)

Engine Mechanical Specifications (5.7 L)

Application		Specification
Application		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
		42 kPa at 1,000 RPM	6 psig at 1,000 RPM
	Oil Pressure - Minimum at Normal Operating Temperature	125 kPa at 2,000 RPM	18 psig at 2,000 RPM
		166 kPa at 4,000 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	56.505-56.533 mm	2.2246-2.2257 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	0.15-0.61 mm	0.006-0.024 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	0.018-0.053 mm	0.0007-0.002 in
	Piston Bore Clearance - Service	0.018-0.061 mm	0.0007-0.0024 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	0.0004-0.0019 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	0.0015-0.003 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	0.46-0.80 mm	0.018-0.031 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	0.038-0.080 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	0.0018-0.0079 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 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 mm	76-84 lb at 1.70 in
	Valve Spring Pressure - Open	832-903 N at 32.3 mm	187-203 lb at 1.27 in
	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

ENGINE MECHANICAL SPECIFICATIONS (5.7 L)

Scheme 23

Scheme 23: Sealers, Adhesives & Lubricants

Scheme 24

Scheme 24: Disassembled Views

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Torque Values and/or Fastener Tightening Strategies

Cylinder head bolts, crankshaft bearing cap bolts, and connecting rod bolts apply a torque angle strategy. In an on-vehicle situation where a torque angle meter may not fit into the vehicle packaging, a three step tightening process may be used with a torque wrench.
Certain fasteners should not be reused. Bolts, studs, or other fasteners that must be replaced will be called out in the specific service procedure.

Changed Engine Specifications

Engine specifications remain the same as the 1999 products.

Engine Mechanical - 5.0L & 5.7L (Unit Repair): Specifications GMC Yukon Denali