V6 Engines

General
Type		90º V6
Displacement		225 cu in
Bore and Stroke		3.750 x 3.400 in
Compression Ratio
	Federal	9.0 : 1
	California	7.4 : 1
Oil Pressure		33 psi at 2400 rpm
Cylinder Numbering	(front-to-rear)
	Right Bank	2-4-6
	Left Bank	1-3-5

Engine Block
Cylinder Bore
	Taper Limit	0.005 in
	Out-of-Round Limit	0.003 in
Piston-to-Cylinder Bore Clearance
	Standard	0.001 in
	Service Limit	0.0015 in

Pistons and Rings
Piston Ring Side Clearance
	Standard
		Top Ring	0.002 in
		2nd Ring	0.003 in
		Oil Ring	0.0015 in
	Service Limit
		Top Ring	0.0035 in
		2nd Ring	0.005 in
		Oil Ring	0.0085 in
Piston Ring End Gap
	Standard
		Compression Rings	0.010 in
		Oil Ring	0.015 in
	Service Limit
		Compression Rings	0.020 in
		Oil Ring	0.035 in
Piston Pin Diameter			0.9334 to 0.9397
Piston Pin-to-Piston Clearance
	Standard		0.004 in
	Service Limit		0.0017 in
Piston Pin-to-Connecting Rod Clearance			0.0007 to 0.0017 in

Cylinder Heads
Valve Seat Angle			45º
Valve Seat Width
	Standard		1/16 in
	Service Limit		5/64 in
Valve Stem Diameter
	Intake		0.3415 to 0.3427
	Exhaust
		Top	0.3402 to 0.3412
		Bottom	0.3397 to 0.3407
Valve Head Diameter
	Intake		1.625 in
	Exhaust		1.3750 in
Valve Stem-to-Guide Clearance
	Intake		0.0012 to 0.0032 in
	Exhaust
		Top	0.0015 to 0.0035 in
		Bottom	0.002 to 0.004 in
Valve Margin Width			1/32 in minimum
Valve Stem Installed Height			1.925 in above cylinder head
Valve Spring Pressure			1.640 in at 59 to 64 lb. 1.260 in at 168 lb

Crankshaft and Flywheel
Main Journal
	Diameter	2.4995 in
	Taper Limit	0.002 to 0.0023 in
	Out of Round Limit	0.0015 in
Main Bearing Oil Clearance
	Standard	0.0005 in
	Service Limit	0.0021 in
Connecting Rod Journal
	Diameter	2.000 in
	Taper Limit	0.003 in
	Out-of-Round	0.0015 in
Connecting Rod Bearing Oil Clearance
	Standard	0.020 in
	Service Limit	0.0023 in
Connecting Rod End Play		0.005 to 0.0012 in total for two rods
Crankshaft End Play		0.004 to 0.008 in
Flywheel Clutch Face Runout Limit		0.0015 in

Camshaft and Valve Train
Bearing Journal Diameter
	Number 1	1.755 to 1.756 in
	Number 2	1.725 to 1.726 in
	Number 3	1.695 to 1.696 in
	Number 4	1.665 to 1.666 in
Bearing Oil Clearance
	Standard	0.0015 in
	Service Limit	0.0040 in
Lifter Type		Hydraulic
Lifter-to-Bore Clearance
	Standard	0.0015 in
	Service Limit	0.0030 in
Rocker Arm-to-Shaft Clearance		0.0017 to 0.0032 in

Oil Pump Gear End Clearance			0.0023 to 0.0058 in

Oversize and Undersize Component Code Letter Definition
Code Letter
	A	Main & Connecting Rod Bearings	0.010 in undersize
	B	Pistons	0.010 in oversize
	AB		Combination of A & B
	R		Short Block
	S		Service engine

Torque Specifications	FT-Lbs	Nm
Main Bearing Cap Bolts	80 to 110	129 to 162
Connecting Rod Cap Nuts	30 to 40	41 to 54
Cylinder Head Bolts	65 to 85	88 to 109
Fan Pulley-to-Vibration Damper Bolts	18 to 25	25 to 34
Flywheel-to-Crankshaft Bolts	50 to 65	68 to 88
Vibration Damper Bolts	140	190
Oil Pan Bolts	10 to 16	14 to 22
Oil Pan Drain Plug	30 to 40	41 to 54
Oil Pump Cover-to-Timing Chain Cover	8 to 12	11 to 17
Oil Pump Pressure Relief Valve	25 to 30	34 to 41
Oil Screen Housing	6 to 9	8 to 12
Oil Pan Baffle	9 to 13	12 to 17
Oil Gallery Plugs	20 to 30	27 to 41
Oil Filter	10 to 15	14 to 20
Timing Chain Cover Bolts	25 to 33	34 to 45
Water Pump Bolts	6 to 8	8 to 11
Fan Driven Pulley Bolts	17 to 23	23 to 32
Thermostat Housing Bolts	17 to 23	23 to 32
Intake Manifold Bolts	45 to 55	61 to 75
Exhaust Manifold Bolts	15 to 20	20 to 27
Carburetor-to-Intake Manifold Bolts	10 to 15	14 to 20
Fuel Pump Bolts	17 to 23	23 to 32
Engine Mount-to-Block Bolts	50 to 75	68 to 102
Fuel Pump Eccentric & Timing Chain Sprocket-to-Camshaft Bolt	40 to 55	54 to 75
Rocker Arm Cover Bolts	3 to 5	4 to 7
Rocker Arm Shaft Bracket Bolts	25 to 35	34 to 48
Alternator Bracket-to-Cylinder Head Bolts	30 to 40	41 to 54
Alternator Pivot Bolt	30 to 40	41 to 54
Alternator Bracket-to-Timing Chain Cover Bolt	18 to 25	24 to 34
Starter Motor Bolts	30 to 40	41 to 54
Starter Motor Brace	9 to 13	12 to 17
Distributor Hold-Down Clamp Bolts	10 to 15	14 to 20
Spark Plugs	25 to 35	34 to 48
Bellhousing-to-Block Bolts	30 to 40	41 to 54
Timing Chain Damper-to-Block Bolts	6 to 9	8 to 12
Movable Timing Chain Damper Bolt	10 to 15	14 to 20