Engine Mechanical Specifications (L84)

Engine Mechanical Specifications

Application	Specification
Engine Type	V8
Displacement	5.3L	323 CID
Bore	96.0 mm	3.779 in
Stroke	92.0 mm	3.622 in
Compression Ratio	11.0:1
Firing Order	1–8–7–2–6–5–4–3
Spark Plug Gap	0.95–1.10 mm	0.037–0.043 in
Camshaft Bearing Bore 1 and 5 Diameter	59.58–59.63 mm	2.345–2.347 in
Camshaft Bearing Bore 2 and 4 Diameter	59.08–59.13 mm	2.325–2.327 in

	Application	Specification
	Camshaft Bearing Bore 3 Diameter	58.58–58.63 mm	2.306–2.308 in
	Crankshaft Main Bearing Bore Diameter	69.870–69.890 mm	2.75–2.751 in
	Crankshaft Main Bearing Bore Out-of-Round	0.008 mm	0.0003 in
	Cylinder Bore Diameter	96.0–96.02 mm	3.779–3.780 in
	Cylinder Head Deck Height – Measuring from the Centerline of Crankshaft to the Deck Face	234.58–234.83 mm	9.235–9.245 in
	Cylinder Head Deck Surface Flatness – Measured Within a 150.0 mm (5.9 in) Area	0.05 mm	0.0014 in
	Cylinder Head Deck Surface Flatness – Measuring the Overall Length of the Block Deck	0.1 mm	0.0039 in
	Valve Lifter Bore Diameter	21.417–21.443 mm	0.843–0.844 in
	Valve Lifter Follower Bore Diameter	29.187–29.213 mm	1.149–1.150
	Camshaft End Play	0.025–0.305 mm	0.001–0.012 in
	Camshaft Journal Diameter	54.99–55.015 mm	2.164–2.166 in
	Camshaft Bearing Diameter	55.063–55.088 mm	2.1678–2.1688 in
	Camshaft Journal-to-Bearing Clearance	0.048–0.098 mm	0.0002–0.0038 in
		0.006 mm	0.0002 in

	Application	Specification
	Camshaft Lobe Lift – Exhaust Non AFM	6.97 mm	0.2741 in
	Camshaft Lobe Lift – Exhaust AFM	7.10 mm	0.279 in
	Camshaft Lobe Lift – Intake Non AFM	7.08 mm	0.278 in
	Camshaft Lobe Lift – Intake AFM	7.21 mm	0.283 in
	Fuel Pump Lobe Lift	5.70 mm	0.224 in
	Camshaft Runout – Measured at the Intermediate Journals	0.05 mm	0.002 in
	Camshaft Position Actuator
	Range of Authority	62 degrees
	Park Position	7 degrees Advanced
	Connecting Rod
	Connecting Rod Bearing Clearance – Production	0.024–0.064 mm	0.0009–0.0025 in
	Connecting Rod Bearing Clearance – Service	0.023–0.076 mm	0.0009–0.003 in
	Connecting Rod Bore Diameter – Bearing End	56.505–56.525 mm	2.224–2.225 in
	Connecting Rod Bore Out-of-Round – Bearing End – Production	0.006 mm	0.0002 in
	Connecting Rod Bore Out-of-Round – Bearing End – Service	0.008 mm	0.0003 in

Application	Specification
Connecting Rod Side Clearance	0.125–0.495 mm	0.005–0.02 in
Crankshaft
Connecting Rod Journal Diameter – Production	53.320–53.336 mm	2.0992–2.0999 in
Connecting Rod Journal Diameter – Service	53.31 mm	2.0987 in
Connecting Rod Journal Out-of-Round – Production	0.005 mm	0.0002 in
Connecting Rod Journal Out-of-Round – Service	0.01 mm	0.00039 in
Connecting Rod Journal Diametrical Taper – Maximum for 1/2 of Journal Length – Production	0.008 mm	0.0003 in
Connecting Rod Journal Diametrical Taper – Maximum for 1/2 of Journal Length – Service	0.015 mm	0.00059 in
Crankshaft End Play	0.040–0.220 mm	0.0015–0.0086 in
Crankshaft Main Bearing Clearance – Production	0.02–0.052 mm	0.0008–0.0021 in
Crankshaft Main Bearing Clearance – Service	0.02–0.065 mm	0.0008–0.0025 in
Crankshaft Main Journal Diameter – Production	64.992–65.008 mm	2.558–2.559 in
Crankshaft Main Journal Diameter – Service	64.982 mm	2.558 in
Crankshaft Main Journal Out-of-Round – Production	0.005 mm	0.00019 in

	Application	Specification
	Crankshaft Main Journal Out-of-Round – Service	0.01 mm	0.00039 in
	Crankshaft Main Journal Taper – Production	0.008 mm	0.0003 in
	Crankshaft Main Journal Taper – Service	0.015 mm	0.0006 in
	Crankshaft Rear Flange Runout	0.025 mm	0.00098 in
	Crankshaft Reluctor Ring Runout – Measured 1.0 mm (0.04 in) Below Tooth Diameter	0.7 mm	0.028 in
	Crankshaft Thrust Surface – Production	26.14–26.22 mm	1.029–1.0315 in
	Crankshaft Thrust Surface – Service	26.22 mm	1.0315 in
	Crankshaft Thrust Surface Runout	0.04 mm	0.0016 in
	Cylinder Head
	Cylinder Head Height/Thickness – Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface	132.5 mm	5.216 in
	Surface Flatness – Block Deck – Measured Within a 152.4 mm (6.0 in) Area	0.05 mm	0.0019 in
	Surface Flatness – Block Deck – Measuring the Overall Length of the Cylinder Head	0.1 mm	0.004 in
	Surface Flatness – Exhaust Manifold Deck	0.1 mm	0.004 in
	Surface Flatness – Intake Manifold Deck	0.1 mm	0.004 in

	Application	Specification
	Valve Guide Installed Height – Measured from the Spring Seat Surface to the Top of the Guide	17.05–17.55 mm	0.671–0.691 in
	Exhaust Manifold
	Surface Flatness Flange to Flange	0.25 mm	0.010 in
	Surface Flatness Individual Flange	0.05 mm	0.002 in
	Injector Bore Diameter	7.65–7.87 mm	0.301–0.309 in
	Intake Manifold
	Surface Flatness – Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings	0.3 mm	0.118 in
	Lubrication System
	Oil Pressure – Minimum – Hot	152 kPa at 1,000 engine RPM 207 kPa at 2,000 engine RPM 228 kPa at 3,000 engine RPM	22 psig at 1,000 engine RPM 30 psig at 2,000 engine RPM 33 psig at 3,000 engine RPM
	Front Cover Alignment – at Oil Pan Surface	0.0–0.5 mm	0.0–0.02 in
	Crankshaft Rear Oil Seal Housing Alignment – at Oil Pan Surface	0.0–0.5 mm	0.0–0.02 in
	Oil Pan Alignment – to Rear of Engine Block at Transmission Bell Housing Mounting Surface	0.0–0.1 mm	0.0–0.004 in
	Piston Rings
	Piston Ring End Gap – First Compression Ring – Measured in Cylinder Bore – Production	0.17–0.33 mm	0.007–0.013 in

Application	Specification
Piston Ring End Gap – First Compression Ring – Measured in Cylinder Bore – Service	0.17–0.39 mm	0.007–0.015 in
Piston Ring End Gap – Second Compression Ring – Measured in Cylinder Bore – Production	0.42–0.68 mm	0.017–0.027 in
Piston Ring End Gap – Second Compression Ring – Measured in Cylinder Bore – Service	0.42–0.74 mm	0.0173–0.029 in
Piston Ring End Gap – Oil Control Ring – Measured in Cylinder Bore – Production	0.15–0.73 mm	0.006–0.029 in
Piston Ring End Gap – Oil Control Ring – Measured in Cylinder Bore – Service	0.15–0.79 mm	0.006–0.031 in
Piston Ring-to-Groove Clearance – First Compression Ring – Production	0.04–0.083 mm	0.0016–0.0033 in
Piston Ring-to-Groove Clearance – First Compression Ring – Service	0.04–0.083 mm	0.0016–0.0033 in
Piston Ring-to-Groove Clearance – Second Compression Ring – Production	0.04–0.083 mm	0.0016–0.0033 in
Piston Ring-to-Groove Clearance – Second Compression Ring – Service	0.04–0.083 mm	0.0016–0.0033 in
Piston Ring-to-Groove Clearance – Oil Control Ring – Production	0.013–0.201 mm	0.0005–0.0079 in
Piston Ring-to-Groove Clearance – Oil Control Ring – Service	0.013–0.201 mm	0.0005–0.0079 in
Pistons and Pins

Application	Specification
Pin – Piston Pin Clearance-to-Piston Pin Bore – Production	0.002–0.010 mm	0.0001–0.0004 in
Pin – Piston Pin Clearance-to-Piston Pin Bore – Service	0.002–0.015 mm	0.0001–0.0006 in
Pin – Piston Pin Diameter	23.952–23.955 mm	0.9430–0.9431 in
Pin – Piston Pin Fit in Connecting Rod Bore – Production	0.007–0.020 mm	0.00028–0.00079 in
Pin – Piston Pin Fit in Connecting Rod Bore – Service	0.007–0.022 mm	0.00028–0.00087 in
Piston – Piston Diameter – Measured Over Skirt Coating	96.017–96.048 mm	3.78020–3.78142 in
Piston – Piston-to-Bore Clearance – Production	−0.048 to +0.001 mm	−0.0019to +0.0000 in
Piston – Piston-to-Bore Clearance – Service Limit with Skirt Coating Worn Off	0.052 mm	0.0020 in
Valve System
Valves – Valve Face Angle	45 degrees
Valves – Valve Face Width	1.25 mm	0.05 in
Valves – Valve Lash	Net Lash – No Adjustment
Valve Lift – Exhaust Non AFM	12.500 mm	0.492 in

Application	Specification
Valve Lift – Exhaust	12.753 mm	0.502 in
Valve Lift – Intake Non AFM	12.700 mm	0.499 in
Valve Lift – Intake	12.953 mm	0.509 in
Valves – Valve Seat Angle	45 degrees
Valves – Valve Seat Runout	0.05 mm	0.002 in
Valves – Valve Seat Runout	0.08 mm	0.003 in
Valves – Valve Seat Width – Exhaust	2.52 mm	0.099 in
Valves – Valve Seat Width – Intake	2.00 mm	0.078 in
Valves – Valve Stem Diameter – Production	7.956–7.976 mm	0.313–0.314 in
Valves – Valve Stem Diameter – Service	7.95 mm	0.313 in
Note: For valve stem to guide clearance – valve guide inner diameter measurements must be recorded at a depth of 7 mm (0.26 in) in the valve guide bore.
Valves – Valve Stem-to-Guide Clearance – Production – Exhaust	0.025–0.066 mm	0.001–0.0026 in
Valves – Valve Stem-to-Guide Clearance – Service – Exhaust	0.093 mm	0.0037 in
Valves – Valve Stem-to-Guide Clearance – Production – Intake	0.025–0.066 mm	0.001–0.0026 in

Application	Specification
Valves – Valve Stem-to-Guide Clearance – Service – Intake	0.093 mm	0.0037 in
Valves – Valve Stem Height – Measured from Spring Seat – Intake and Exhaust	51.715–52.465 mm	2.036–2.065 in
Rocker Arms – Valve Rocker Arm Ratio	1.80:1
Valve Springs – Valve Spring Free Length	57.0 mm	2.24 in
Valve Springs – Valve Spring Installed Height	47.75 mm	1.88 in
Valve Springs – Valve Spring Load – Closed	400 N at 47.75 mm	90 lb at 1.88 in
Valve Springs – Valve Spring Load – Open	1175 N at 35.05 mm	264 lb at 1.38 in