Subaru Legacy BN/BS (2015-2019) Service Manual: Specification

Subaru Legacy BN/BS (2015-2019) Service Manual / Mechanical(h6do) / General description / Specification

Engine	Model				3.6 L
	Cylinder arrangement				Horizontally opposed, liquid cooled, 6-cylinder, 4-stroke gasoline engine
	Valve system mechanism				Chain driven, double overhead camshaft, 4-valve/cylinder
	Bore - Stroke		mm (in)		92.0 - 91.0 (3.62 - 3.58)
	Displacement		cm3 (cu in)		3,630 (221.5)
	Compression ratio				10.5
	Compression (350 r/min and fully open throttle)	kPa (kg/cm2, psi)		Standard	1,128 — 1,471 (11.5 — 15.0, 164 — 213)
	Number of piston rings				Pressure ring: 2, Oil ring: 1
	Intake valve timing		Open	Max. retard	ATDC 10°
				Min. advance	BTDC 40°
			Close	Max. retard	ABDC 74°
				Min. advance	ABDC 24°
	Exhaust valve timing		Open	Max. retard	BBDC 4°
				Min. advance	BBDC 44°
			Close	Max. retard	ATDC 44°
				Min. advance	ATDC 4°
	Valve clearance	mm (in)	Intake		0.20+0.04 −0.06 (0.0079+0.0016 −0.0024)
			Exhaust		0.35±0.05 (0.0138±0.0020)
	Idle speed [Select lever is in “P” or “N” range]	r/min	No load	Standard	700±100
			A/C ON	Standard	700 — 910±100
	Ignition order				1 > 6 > 3 > 2 > 5 > 4
	Ignition timing	BTDC/{r/min}		Standard	15°±8°/700

NOTE:

OS: Oversize

US: Undersize

Camshaft	Bending limit				mm (in)	0.020 (0.00079)
	Cam lobe height	mm (in)	Intake		Standard	45.90 — 46.00 (1.8071 — 1.8110)
			Exhaust		Standard	44.65 — 44.75 (1.7579 — 1.7618)
	Cam base circle diameter	mm (in)	Intake		Standard	36.00 (1.4173)
			Exhaust		Standard	36.00 (1.4173)
	Journal O.D.	mm (in)	Front		Standard	37.946 — 37.963 (1.4939 — 1.4946)
			Except for front		Standard	25.946 — 25.963 (1.0215 — 1.0222)
	Oil clearance			mm (in)	Standard	0.037 — 0.072 (0.0015 — 0.0028)
	Thrust clearance	mm (in)	Intake		Standard	0.075 — 0.135 (0.0030 — 0.0053)
			Exhaust		Standard	0.075 — 0.135 (0.0030 — 0.0053)
Cylinder head	Warping limit (Mating surface with cylinder block)			mm (in)		0.020 (0.0008)
	Standard height			mm (in)		124±0.05 (4.88±0.0020)
Valve seat	Seating angle between valve and valve seat					90°
	Contacting width between valve and valve seat	mm (in)	Intake		Standard	1.0 (0.039)
			Exhaust		Standard	1.5 (0.059)
Valve guide	Clearance between the valve guide and valve stem	mm (in)	Intake		Standard	0.030 — 0.057 (0.0012 — 0.0022)
			Exhaust		Standard	0.040 — 0.067 (0.0016 — 0.0026)
	Inside diameter				mm (in)	5.500 — 5.512 (0.2165 — 0.2170)
	Valve stem outer diameters		mm (in)	Intake		5.455 — 5.470 (0.2148 — 0.2154)
				Exhaust		5.445 — 5.460 (0.2144 — 0.2150)
	Valve guide protrusion amount		Intake		mm (in)	8.6 — 9.0 (0.3386 — 0.3543)
			Exhaust		mm (in)	10.7 — 11.1 (0.4213 — 0.4370)
Valve	Head edge thickness	mm (in)	Intake		Standard	1.0 (0.039)
			Exhaust		Standard	1.2 (0.047)
	Overall length		mm (in)	Intake		103.5 (4.075)
				Exhaust		103.2 (4.063)
Valve spring	Free length	mm (in)	Intake			49.06 (1.9315)
			Exhaust			49.06 (1.9315)
	Tension/spring height	N (kgf, lb)/mm (in)			Set	182 — 210 (18.6 — 21.4, 40.9 — 47.2) /31.0 (1.220)
					Lift	316 — 350 (32.2 — 35.7, 71.0 — 78.7) /21.0 (0.827)
	Squareness					2.5°, 2.1 mm (0.083 in)
Valve lifter	Outer diameter			mm (in)	Standard	32.959 — 32.975 (1.2976 — 1.2982)
	Valve lifter mating surface inner diameter			mm (in)	Standard	32.994 — 33.016 (1.2990 — 1.2998)
	Valve lifter and valve lifter mating surface clearance			mm (in)	Standard	0.019 — 0.057 (0.0007 — 0.0022)
Cylinder block	Warping limit (Mating surface with cylinder head)			mm (in)		0.020 (0.0008)
	Standard height			mm (in)		202 (7.95)
	Cylindricality		mm (in)		Limit	0.030 (0.0012)
	Out-of-roundness		mm (in)		Limit	0.030 (0.0012)
	Clearance between cylinder and piston at 20°C (68°F)		mm (in)		Standard	−0.010 — 0.010 (−0.0004 — 0.0004)
	Cylinder inner diameter boring limit (diameter)				mm (in)	92.515 (3.6717)
Piston	Piston grade point				mm (in)	37.3 (1.4685)
	Outer diameter	mm (in)	Standard		A	92.005 — 92.015 (3.6222 — 3.6226)
					B	91.995 — 92.005 (3.6218 — 3.6222)
			0.25 (0.0098) OS			92.245 — 92.265 (3.6317 — 3.6325)
			0.50 (0.0197) OS			92.495 — 92.515 (3.6415 — 3.6423)
	Inner diameter of piston pin hole		mm (in)		Standard	22.000 — 22.006 (0.8661 — 0.8664)
Piston pin	Degree of fit					Piston pin must be fitted into position with thumb at 20°C (68°F).
	Outer diameter		mm (in)		Standard	21.994 — 22.000 (0.8659 — 0.8661)
	Clearance between piston and piston pin			mm (in)	Standard	0.004 — 0.008 (0.0002 — 0.0003)
Piston ring	Piston ring gap	mm (in)	Top ring		Standard	0.20 — 0.35 (0.0079 — 0.0138)
			Second ring		Standard	0.40 — 0.50 (0.0157 — 0.0197)
			Oil ring		Standard	0.20 — 0.50 (0.0079 — 0.0197)
	Clearance between piston ring and piston ring groove	mm (in)	Top ring		Standard	0.040 — 0.080 (0.0016 — 0.0031)
			Second ring		Standard	0.030 — 0.070 (0.0012 — 0.0028)
			Oil ring		Standard	0.065 — 0.165 (0.0026 — 0.0065)
Connecting rod and connecting rod bearing	Bend or twist per 100 mm (3.94 in) in length			mm (in)	Limit	0.10 (0.0039 in)
	Thrust clearance			mm (in)	Standard	0.070 — 0.330 (0.0028 — 0.0130)
	Oil clearance			mm (in)	Standard	0.016 — 0.043 (0.0006 — 0.0017)
	Bearing size (thickness at center)		mm (in)	Standard		1.495 — 1.511 (0.0589 — 0.0595)
				0.03 (0.0012) US		1.515 — 1.519 (0.0596 — 0.0598)
				0.05 (0.0020) US		1.525 — 1.529 (0.0600 — 0.0602)
				0.25 (0.0098) US		1.625 — 1.629 (0.0640 — 0.0641)
Bushing of small end	Clearance between piston pin and bushing			mm (in)	Standard	0 — 0.022 (0 — 0.0009)
Crankshaft and crankshaft bearing	Bending limit				mm (in)	0.035 (0.0014)
	Crank pin	Out-of-roundness		mm (in)	Limit	0.005 (0.0002)
		Cylindricality		mm (in)	Limit	0.006 (0.0002)
		Grinding limit		mm (in)		51.734 (2.0368)
	Crank journal	Out-of-roundness		mm (in)	Limit	0.005 (0.0002)
		Cylindricality		mm (in)	Limit	0.006 (0.0002)
		Grinding limit		mm (in)		63.742 (2.5095)
	Crank pin outer diameter		mm (in)	Standard		51.976 — 52.000 (2.0463 — 2.0472)
				0.03 (0.0012) US		51.954 — 51.970 (2.0454 — 2.0461)
				0.05 (0.0020) US		51.934 — 51.950 (2.0446 — 2.0453)
				0.25 (0.0098) US		51.734 — 51.750 (2.0368 — 2.0374)
	Crank journal outer diameter	mm (in)	#1, #3, #5, #7	Standard		63.992 — 64.016 (2.5194 — 2.5203)
				0.03 (0.0012) US		63.962 — 63.978 (2.5182 — 2.5188)
				0.05 (0.0020) US		63.942 — 63.958 (2.5174 — 2.5180)
				0.25 (0.0098) US		63.742 — 63.758 (2.5095 — 2.5102)
			#2, #4, #6	Standard		63.992 — 64.016 (2.5194 — 2.5203)
				0.03 (0.0012) US		63.962 — 63.978 (2.5182 — 2.5188)
				0.05 (0.0020) US		63.942 — 63.958 (2.5174 — 2.5180)
				0.25 (0.0098) US		63.742 — 63.758 (2.5095 — 2.5102)
	Bearing size (thickness at center)	mm (in)	#1, #3, #5	Standard		1.996 — 2.013 (0.0786 — 0.0793)
				0.03 (0.0012) US		2.011 — 2.014 (0.0792 — 0.0793)
				0.05 (0.0020) US		2.021 — 2.024 (0.0796 — 0.0797)
				0.25 (0.0098) US		2.121 — 2.124 (0.0835 — 0.0836)
			#2, #4, #6	Standard		1.996 — 2.013 (0.0786 — 0.0793)
				0.03 (0.0012) US		2.015 — 2.018 (0.0793 — 0.0794)
				0.05 (0.0020) US		2.025 — 2.028 (0.0797 — 0.0798)
				0.25 (0.0098) US		2.125 — 2.128 (0.0837 — 0.0838)
			#7	Standard		1.992 — 2.009 (0.0784 — 0.0791)
				0.03 (0.0012) US		2.011 — 2.014 (0.0792 — 0.0793)
				0.05 (0.0020) US		2.021 — 2.024 (0.0796 — 0.0797)
				0.25 (0.0098) US		2.121 — 2.124 (0.0835 — 0.0836)
	Thrust clearance		mm (in)	Standard		0.040 — 0.212 (0.0016 — 0.0083)
	Oil clearance		mm (in)	Standard		0.010 — 0.030 (0.0004 — 0.0012)

Caution

• Prior to starting work, pay special attention to the following:1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary ...

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