L- and F- Four-Cylinder Engines

General
Type	In-line four-cylinder with F- or L-head valve configuration
Displacement		134 cu in
Firing Order		1-3-4-2
Cylinder numbering	(from front-rear	1-2-3-4
Bore and Stroke		3-1/8 x 4-3/8 in
Oil Pressure
	L-head to S/N 44417	50psi at 30 mph
	L-head to S/N 44417 and on	35 psi at 2000 rpm
	f-head	35 psi at 2000 rpm

Valve Timing
Intake Valve
	Opens	9º BTC
	Closes	50º ABC
Exhaust
	Opens	47º BBC
	Closes	12º ATC

Engine Block
Cylinder Bore
	Diameter	3.125 to 3.127 in
	Taper Limit	0.005 in
	Out-of-Round Limit	0.005 in
Deck Warpage Limit		0.010 in

Pistons and Rings
Piston Diameter	(near bottom of skirt)		3.1225 to 3.1245 in
Piston-to-Cyliner Bore Clearance			0.003 in
Piston Ring Side Clearance
	Top Ring		0.002 to 0.004 in
	2nd Ring		0.0015 to 0.0035 in
	Oil Ring		0.001 to 0.0025 in
Piston Ring End Gap
	Cylinder bore oversize	Ring Size	End Gap
	Standard to 0.009 in	Standard	0.007 to 0.045 in
	0.010 to 0.019 in	0.020 in	0.007 to 0.017 in
	0.020 to 0.024 in	0.020 in	0.007 to 0.029 in
	0.025 to 0.029 in	0.030 in	0.007 to 0.017 in
	0.030 to 0.034 in	0.030 in	0.007 to 0.029 in
	0.035 to 0.039 in	0.040 in	0.007 to 0.017 in
	0.040 in	0.040 in	0.007 to 0.017 in
Piston Pin Diameter			0.8119 to 0.8121 in
Piston Pin-to-Piston Clearance
	Standard		0.0001 in
	Service Limit		0.0003 in
Connecting Rod End Play			0.004 to 0.010 in

Crankshaft and Flywheel
Main Journal
	Diameter	2.3331 to 2.3341 in
	Taper Limit	0.001 in
	Out of Round Limit	0.001 in
Main Bearing Oil Clearance
	Standard	0.0003 in
	Service Limit	0.0029 in
Connecting Rod Journal
	Diameter	1.9375 to 1.9383 in
	Taper Limit	0.001 in
	Out-of-Round	0.001 in
Connecting Rod Bearing Oil Clearance
	Standard	0.001 in
	Service Limit	0.0019 in
Crankshaft End Play		0.004 to 0.006 in
Flywheel Clutch Face Runout Limit		0.005 in

Camshaft
Bearing Journal Diameter
	Number 1	2.1860 to 2.1855 in
	Number 2	2.1225 to 2.1215 in
	Number 3	2.0600 to 2.0590 in
	Number 4	1.6230 to 1.6225 in
Bearing Oil Clearance
	Standard	0.001 in
	Service Limit	0.0025 in
End Play		0.004 to 0.007 in

Cylinder Head and Valve Train
Head Warpage Limit
	L-head		1/32 in
	F-head		0.010 in
Valve Seat Angle			45º
Valve Seat Width			3/32 to 1/8 in
Valve Seat Runout Limit			0.002 in
Valve Face Angle			45º
Valve Margin Width			1/32 in minimum
Valve Stem Diameter
	Intake		0.3733 to 0.3738 in
	Exhaust		0.371 to 0.372 in
Valve Stem-to-Guide Clearance
	Intake		0.0007 to 0.0022 in
	Exhaust		0.0025 to 0.0045 in
Valve Spring Free Length	(intake and exhaust0
	L-head		2.50 in
	F-head		1.97 in
Valve Spring Pressure	(lbs at specified length)
	Open
		Standard	120 at 1.750 in
		Service Limit	110 at 1.750 in
	Closed
		Standard	53 at 2.109 in
		Service Limit	47 at 2.109 in
Lifter Type			Mechanical
Lifter Diameter			0.6245 to 0.6240 in
Lifter-to-Bore Clearance			0.0005 to 0.002 in

Oil Pump
Early model L-head Engine	(to engine S/N 44417)
	Rotor End Play		0.002 to 0.005 in
	Pump Shaft End Play		0.002 to 0.004 in
Late model L-head Engine	(engine S/N 44417 and on)
	Rotor Lobe Clearance		0.010 in or less
	Rotor End Play		0.004 in
	Outer Rotor-to-Pump Body Clearance		0.012 in or less
	Rotor Thickness Variance		0.001 in or less
	Driven Gear-to-Pump Body Running Clearance
		L-head	0.003 to 0.010 in
		F-head	0.022 to 0.051 in
	Pump Cover Warpage Limit		0.001 in

Oversize and Undersize Component Code Letter Definition
Code Letter
	A	Main and connecting rod bearing	0.010 in undersize
	B	Pistons	0.010 in oversize
	AB		Combination of A and B

Torque Specifications	FT-Lbs	Nm
Camshaft Thrust Plate Bolt	26	35
Camshaft Gear or Sprocket Bolts	30 to 40	41 to 55
Main Bearing Cap Bolts	65 to 75	88 to 101
Connecting Rod Cap Nuts	35 to 45	48 to 61
Cylinder Head Bolts	60 to 70	82 to 95
Flywheel Bolts	35 to 41	48 to 55
Manifold Assembly Bolts	29 to 35	33 to 48
Oil Pan Bolts	9 to 14	12 to 19
Piston Pin Lock Screw	35 to 41	48 to 55
Spark Plugs	25 to 33	34 to 48
Rocker Arm Cover Nuts(F-head)	7 to 10	9.5 to 13.6
Rocker Arm Assembly Nuts(F-head)	30 to 36	41 to 48
Valve Lifter Cover Bolts(all)	7 to 10	9.5 to 13.6
Water Outlet Bolts	20 to 25	27 to 34
Water Pump Bolts	12 to 17	16 to 23