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Home >> Cadillac >> 2003 >> DeVille V8-4.6L VIN 9 >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> System Specifications >> General Specifications >> Engine Mechanical Specifications

Engine Mechanical Specifications

General Engine Type V-8
Piston Displacement 279 cu in
RPO L37
VIN 9
Compression Ratio 10.0:1
Compression pressure
at cranking speed,Throttle Open		140-170 psi
Power 300 hp @ 5 600 RPM
Torque 295 ft. lbs. @ 4,000 RPM
Firing Order 1-2-7-3-4-5-6-8
Bearings Crankshaft, Main, Bearing Material Aluminum
Production Clearance 0.0006-0.0022 in
Service - Maximum 0.0025 in
Connecting Rod Bearing Material Aluminum
Production Clearance 0.0010-0.0030 in
Service - Maximum 0.0030 in
Camshaft Camshaft Material Hardened Cast Gray Iron Bearing Number
Bearing Number 5
Bearing number on left cylinder head intake 6
Bearing Journal Diameter 1.0610-1.0619 in
Bearing Bore Diameter, In Cylinder Head 1.0635-1.0642 in
Bearing Clearance 0.0020-0.0030 in
Production Limits 0.0016-0.0035 in
Service Limits - Maximum 0.0035 in
Runout 0.0020 in
Out-of-Round 0.0002 in
Straightness 0.0003 in
Thrust Width 0.9051-0.9091 in
Timing, @ 0.150 mm [0.006 in] Lift, Intake Opens 0°
Intake Centerline 122° ATDC
Intake Closes 251° ATDC
Exhaust Opens 225.5° BTDC
Exhaust Centerline 106° BTDC
Exhaust Closes 20.5°ATDC
Camshaft Lift, Intake 0.2421 in
Exhaust 0.2339 in
Valve Intake 0.4134 in
Exhaust 0.3937 in
Duration, @ 0.150mm [0.006 in] Lift, Intake 251°
Exhaust 246°
Valve Overlap, 0.150 mm [0.006 in] Lift 2.04°
Left Intake Water Pump Drive End, Diamete 0.6241-0.6261 in
Diameter Within Last 19.5mm 0.7677 inch 0.6249-0.6253
Runout 0.0059 in.
Camshaft Drive Primary Drive Type Endless Chain
Adjustment Hydraulic Automatic
Pitch 0.315 in
Width Single Row
Secondary Drive Type Endless Chain
Adjustment Hydraulic, Automatic
Pitch 0.315 in
Width Single Row
Connecting Rods Diameter, Crankshaft End, Without Bearings 2.2495-2.2501 in
Taper, Maximum 0.0002 in
Piston Pin End, With Bushing 0.8268-0.8274 in
Taper, Maximum 0.0003 in
Without Bushing 0.9234-0.9421 in
Width 0.8572 in
Center to Center 5.9449 in
Side Clearance, Pair of Connecting Rods on Crankpin 0.0079-0.0197 in
Crankshaft Journals Crankshaft, Main, Diameter 2.5335-2.5341 in
Runout #1 #5 0.0009 in
Runout #2, #3, #4 0.0010 in
Round 0.0002 in
Taper 0.0002 in
Width, #1, #2, #4, #5 0.9661-0.9709 in
Thrust #3 Wall Width 0.9902-0.9941 in
Runout 0.0016 in
Square 0.0004 in
Crankpin, Connecting Rod, Diameter 2.1239-2-1245 in
Round 0.0002 in
Taper 0.0002 in
Width 1.7260-1.7307 in
End Play Production 0.0020-0.0197 in
Service - Maximum 0 0197 in
Flange, Engine Flywheel Face Runout 0.0010 in
Rear Seal Diameter 3.7748-3.7787 in
Runout 0.0010 in
Nose Diameter, 0.0-21.0mm (0.000-0.827 inch), From Front Face 1.3583-1.3681 in
Runout 0.0039 in
21.0-53.00mm (0.827-2.087 in.), From front Face 1.3737-1.3745 in.
Runout 0.0012 in
53.00 mm (2.087 in), From Front Face, to Rolled Fillet 1.3169-1.3209 in.
Runout 0.0039 in.
89.94-110.54 mm (3.541-4.352 in), From Front Face 1.7697-1.7717 in.
Runout 0.0010 in.
Crankshaft Balancer Hub Inside Diameter 1.3719-1.3726 in
Outside Diameter, Without Wear Sleeve 1.9972-2.0028 in
Runout 0.0039 in
Cylinder Block Material Aluminum with Cast-in Grey Iron Sleeves
Length 20.8100 in
Cylinder Bore Diameter @41mm (1.6100 inch) Below Deck Face 3.6611-3.6617 in.
Out-of-Round, Production 0.0004 in
Service - Maximum Allowed 0.0039 in
Taper, Production 0.0004 in
Service - Maximum Allowed 0.0039 in
Piston Clearance @ 41mm (1.6100 inch) Below Deck Face 0.0008-0.0020 in
Stroke 3.3071 in
Deck Height 8.8406 in
Clearance - Above Deck Surface 0.0177 in
Face Flatness - Maximum Allowed 0.0039 in
Crankshaft Bearing Bore, Mains, Diameter 2.8516-2.8521 in
Crankshaft Rear Seal Bore, Diameter 4.5654-4.5684 in
Runout - Maximum Allowed 0.0098 in
Cylinder Head Type DOHC-4 Valves Per Cylinder
Material Aluminum
Combustion Chamber Volume 2.965 cu in
Chamber Depth to Surface 0.4122-0.4217 in
Flatness, Without Resurfacing - Maximum 0.0020 in
Resurfacing Amount - Maximum 0.0079 in
Distance to Camshaft Bore Centerline 5.3543 in
Inside Diameter 0.2350-0.2358 in
Valve Guide-to-Valve Stem Clearance Production, Exhaust 0.0020-0.0039 in
Intake 0.0011-0.0027 in
Service, Exhaust 0.0047 in
Intake 0.0043 in
Valve Seating Surface, Angle 45.75°
Width, Exhaust 0.0512-0.0669 in
Intake 0.0165-0.0323 in
Runout - Maximum 0.0020 in
Relief, Angle 20°
Width Exhaust 0.0063-0.0142 in.
Intake 0.0043-0.0118 in
Runout - Maximum 0.0020 in
Undercut Angle, Exhaust 65°
Intake 60°
Oil System Oil Pump Type Gerotor
Minimum Pressure at Normal Operating Temperature Idle 5 psi
Minimum Pressure at Normal Operating Temperature 2,000 RPM 35 psi
Oil Pressure Recirculation Internal Piston Valve
Oil Filter Type PF 58
Oil Capacity with Filter 7.5 Quarts
Without Filter 7 Quarts
Pistons Material Aluminum
Diameter 3.6597-3.6603 in
Taper No Taper Measurement
Pin Bore Diameter 0.8269-0.8271 in
Ring Groove Width, 1st Compression Top 0.0484-0.0494 in
2nd Compression 0.0602-0.0612 in
Oil Control 0.0996-0.1006 in
Inside Diameter 1st Compression Top 3.3354-3.3453 in
2nd Compression 3.2779-3.2878 in
Oil Control 3.3689-3.3787 in
Piston Pins Material Steel
Diameter 0.8266-0.8268 in
Length 2.4409-2.4212 in
Retention Snap Rings (2)
Piston Rings Compression 2
Oil ring 1
Side clearance, 1st compression, Top 0.0016-0.0037 in.
2nd compression 0.0016-0.0037 in.
Oil Control None-Side Sealing
Ring end gap, 1st compression, top 0.0098-0.0157 in.
2nd compression 0.0138-0.0020 in.
Oil control 0.0098-0.0299 in.
Rocker Arms Followers Type Roller
Ratio 1.68 to 1
Roller Diameter 0.6984-0.7008 in.
Valves Exhaust, length from tip to face od 3.6114-3.6217 in.
Head, Diameter 1.0976-1.1079 in.
Runout-Maximum 0.150 in
Chamfer, Angle 30°
Width - Minimum 0 0150 in
Margin Width 0.0421 in
Face, Angle 45°
Width - Minimum 0.0591 in.
Runout - Maximum 0 0015 in
Valve Stem Diameter 0.2331-0.2339 in
Out-of-Round - Maximum Deviation 0.0003 in
Straightness - Maximum Deviation 0.0005 in
Intake, length from Tip to Face OD 4.3543-4.3646 in.
Head Diameter 1.4209-1.4311 in.
Runout-Maximum 0.0150 in.
Chamfer, Angle 30°
Width-Minimum 0.0150 in.
Margin Width 0.0350 in.
Face,Angle 45°
Width-Minimum 0.0394 in.
Runout-Maximum 0.0015 in.
Valve stem diameter 0.2331-0.2339 in.
Out-of-Round- Maximum Deviation 0.003 in.
Straightness-Maximum Deviation 0.0005 in.
Valve lifters
Stationary Hydraulic Lifter Adjuster-SHLA		Type Stationary Hydraulic
Diameter 0.4719-0.4724 in.
Lifter bore diameter, in cylinder head 0.4730-0.4739 in.
Clearance 0.0015-0.0016 in.
Valve Springs Length installed 1.3780 in.
Free 1.6059-1.7201 in.
Valve closed 1.3780 in.
Valve Open 0.9646 in.
Force, Valve Closed 47.5-52.5 lb
Valve open 130.2-141.9 lb
Diameter inside 0.6988-0.7185 in.
Outside 1.0327 in.
Wire,ovate 0.1618X0.1291 in.
Coil Direction Clockwise
Total Number of coils 6.90-7.10
Identifier orange
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