Engine Mechanical (H4DOTC): Specifications — Subaru Baja I (2002-2006)

SPECIFICATIONS

Note. STD: Standard I.D.: Inner Diameter O.D.: Outer Diameter OS: Oversize US: Undersize

Engine	Type			Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine
	Valve arrangement			Belt driven, double overhead camshaft, 4-valve/cylinder
	Bore x Stroke		Mm (in)	99.5 x 79.0 (3.917 x 3.110)
	Piston displacement		Cm 3 (cu in)	2,457 (150)
	Compression ratio			8.2
	Compression pressure (at 200 - 300 rpm)		KPa (kgf/cm 2 , psi)	981 - 1,177 (10 - 12, 142 - 171)
	Number of piston rings			Pressure ring: 2, Oil ring: 1
	Intake valve timing	Opening	Max. retard	ATDC 5°
		Opening	Min. advance	BTDC 15°
		Closing	Max. retard	ABDC 65°
		Closing	Min. advance	ABDC 45°
	Exhaust valve timing	Opening		BBDC 55°
	Exhaust valve timing	Closing		ATDC 5°
	Valve clearance	Intake	Mm (in)	0.20 +0.04 -0.06 (0.0079 +0.0016 -0.0024 )
	Valve clearance	Exhaust	Mm (in)	0.35 ± 0.05 (0.0138 ± 0.0020)
	Idling speed [At neutral position on MT, "P" or "N" position on AT] rpm		No load	M/T:700 ± 100 A/T: 750 ± 100
			A/C ON	A/C refrigerant pressure low	M/T: 725 ± 100 A/T: 750 ± 100
			A/C ON	A/C refrigerant pressure high	M/T: 800 ± 100 A/T: 825 ± 100
	Firing order			1 --> 3 --> 2 --> 4
	Ignition timing		BTDC/rpm	MT: 13° ± 10° AT: 17° ± 10°
Belt tension adjuster	Protrusion of adjuster rod			5.2 - 6.2 mm (0.205 - 0.244 in)
Belt tensioner	Spacer O.D.			17.955 - 17.975 mm (0.7069 - 0.7077 in)
	Tensioner bush I.D.			18.0 - 18.08 mm (0.7087 - 0.7118 in)
	Clearance between spacer and bush		STD	0.025 - 0.125 mm (0.0010 - 0.0049 in)
	Clearance between spacer and bush		Limit	0.175 mm (0.0069 in)
	Side clearance of spacer		STD	0.2 - 0.55 mm (0.0079 - 0.0217 in)
	Side clearance of spacer		Limit	0.81 mm (0.0319 in)
Camshaft	Bend limit			0.020 mm (0.0079 in)
	Thrust clearance		STD	0.068 - 0.116 mm (0.0027 - 0.0046 in)
	Thrust clearance		Limit	0.14 mm (0.0055 in)
	Cam lobe height	Intake	STD	46.55 - 46.65 mm (1.833 - 1.837 in)
		Intake	Limit	46.45 mm (1.829 in)
		Exhaust	STD	46.75 - 46.85 mm (1.841 - 1.844 in)
		Exhaust	Limit	46.65 mm (1.837 in)
	Journal O.D.	STD	Front	37.946 - 37.963 mm (1.4939 - 1.4946 in)
	Journal O.D.	STD	Center rear	29.946 - 29.963 mm (1.1790 - 1.1796 in)
	Oil clearance		STD	0.037 - 0.072 mm (0.0015 - 0.0028 in)
	Oil clearance		Limit	0.10 mm (0.0039 in)
Cylinder head	Surface warpage limit			0.05 mm (0.0020 in)
	Surface grinding limit			0.3 mm (0.012 in)
	Standard height			127.5 mm (5.02 in)
Valve seat	Refacing angle			90°
	Contacting width	Intake	STD	1.0 mm (0.039 in)
		Intake	Limit	1.7 mm (0.067 in)
		Exhaust	STD	1.5 mm (0.059 in)
		Exhaust	Limit	2.2 mm (0.087 in)
Valve guide	Inner diameter			6.000 - 6.012 mm (0.2362 - 0.2367 in)
Valve guide	Protrusion above head			15.8 - 16.2 mm (0.622 - 0.638 in)
Valve	Head edge thickness	Intake	STD	1.2 mm (0.047 in)
		Intake	Limit	0.8 mm (0.031 in)
		Exhaust	STD	1.5 mm (0.059 in)
		Exhaust	Limit	0.8 mm (0.031 in)
	Stem diameter		Intake	5.955 - 5.970 mm (0.2344 - 0.2350 in)
	Stem diameter		Exhaust	5.945 - 5.960 mm (0.2341 - 0.2346 in)
	Stem oil clearance	STD	Intake	0.030 - 0.057 mm (0.0012 - 0.0022 in)
		STD	Exhaust	0.040 - 0.067 mm (0.0016 - 0.0026 in)
		Limit		0.15 mm (0.0059 in)
	Overall length		Intake	104.4 mm (4.110 in)
	Overall length		Exhaust	104.65 mm (4.120 in)
Valve spring	Free length			47.32 mm (1.863 in)
	Squareness			2.5°, 2.1 mm (0.083 in)
	Tension/spring height		Set	205 - 235 N (20.9 - 24.0 kgf, 46.1 - 52.8 lb)/36.0 mm (1.417 in)
	Tension/spring height		Lift	426 - 490 N (43.4 - 50.0 kgf, 95.8 - 110 lb)/26.50 mm (1.043 in)
Cylinder block	Surface warpage limit (mating with cylinder head)			0.05 mm (0.0020 in)
	Surface grinding limit			0.1 mm (0.004 in)
	Standard height			201.0 mm (7.91 in)
	Cylinder bore	STD	A	99.505 - 99.515 mm (3.9175 - 3.9179 in)
	Cylinder bore	STD	B	99.495 - 99.505 mm (3.9171 - 3.9175 in)
	Taper		STD	0.015 mm (0.0006 in)
	Taper		Limit	0.050 mm (0.0020 in)
	Out-of-roundness		STD	0.010 mm (0.0004 in)
	Out-of-roundness		Limit	0.050 mm (0.0020 in)
	Piston clearance		STD	0.010 - 0.010 mm (-0.0004 - 0.0004 in)
	Piston clearance		Limit	0.030 mm (0.0012 in)
	Enlarging (boring) limit			0.5 mm (0.020 in)
Piston	Outer diameter	STD	A	99.505 - 99.515 mm (3.9175 - 3.9179 in)
		STD	B	99.495 - 99.505 mm (3.9171 - 3.9175 in)
		0.25 mm (0.0098 in) OS		99.745 - 99.765 mm (3.9270 - 3.9278 in)
		0.50 mm (0.0197 in) OS		99.995 - 100.015 mm (3.9368 - 3.9376 in)
Piston pin	Standard clearance between piston pin and hole in piston		STD	0.004 - 0.008 mm (0.0002 - 0.0003 in)
	Standard clearance between piston pin and hole in piston		Limit	0.020 mm (0.0008 in)
	Degree of fit			Piston pin must be fitted into position with thumb at 20°C (68°F).
Piston ring	Piston ring gap	Top ring	STD	0.20 - 0.25 mm (0.0079 - 0.0098 in)
		Top ring	Limit	1.0 mm (0.039 in)
		Second ring	STD	0.37 - 0.52 mm (0.015 - 0.020 in)
		Second ring	Limit	1.0 mm (0.039 in)
		Oil ring	STD	0.20 - 0.50 mm (0.0079 - 0.020 in)
		Oil ring	Limit	1.5 mm (0.059 in)
	Clearance between piston ring and piston ring groove	Top ring	STD	0.040 - 0.080 mm (0.0016 - 0.0031 in)
		Top ring	Limit	0.15 mm (0.0059 in)
		Second ring	STD	0.030 - 0.070 mm (0.0012 - 0.0028 in)
		Second ring	Limit	0.15 mm (0.0059 in)
Connecting rod	Bend twist per 100 mm (3.94 in) in length		Limit	0.10 mm (0.0039 in)
	Side clearance		STD	0.070 - 0.330 mm (0.0028 - 0.0130 in)
	Side clearance		Limit	0.4 mm (0.016 in)
Connecting rod bearing	Oil clearance		STD	0.017 - 0.045 mm (0.0007 - 0.0018 in)
	Oil clearance		Limit	0.05 mm (0.0020 in)
	Thickness at center portion		STD	1.490 - 1.502 mm (0.0587 - 0.0591 in)
			0.03 mm (0.0012 in) US	1.504 - 1.512 mm (0.0592 - 0.0595 in)
			0.05 mm (0.0020 in) US	1.514 - 1.522 mm (0.0596 - 0.0599 in)
			0.25 mm (0.0098 in) US	1.614 - 1.622 mm (0.0635 - 0.0639 in)
Connecting rod bushing	Clearance between piston pin and bushing		STD	0 - 0.022 mm (0 - 0.0009 in)
Connecting rod bushing	Clearance between piston pin and bushing		Limit	0.030 mm (0.0012 in)
Crankshaft	Bend limit			0.035 mm (0.0014 in)
	Crank pin and crank journal	Out-of-roundness		0.005 mm (0.0002 in) or less
	Crank pin and crank journal	Grinding limit		0.25 mm (0.0098 in)
	Crank pin outer diameter		STD	51.984 - 52.000 mm (2.0466 - 2.0472 in)
			0.03 mm (0.0012 in) US	51.954 - 51.970 mm (2.0454 - 2.0461 in)
			0.05 mm (0.0020 in) US	51.934 - 51.950 mm (2.0447 - 2.0453 in)
			0.25 mm (0.0098 in) US	51.734 - 51.750 mm (2.0368 - 2.0374 in)
	Crank journal outer diameter	#1, #3, #5	STD	59.992 - 60.008 mm (2.3619 - 2.3625 in)
			0.03 mm (0.0012 in) US	59.962 - 59.978 mm (2.3607 - 2.3613 in)
			0.05 mm (0.0020 in) US	59.942 - 59.958 mm (2.3599 - 2.3605 in)
			0.25 mm (0.0098 in) US	59.742 - 59.758 mm (2.3520 - 2.3527 in)
		#2, #4	STD	59.992 - 60.008 mm (2.3619 - 2.3625 in)
			0.03 mm (0.0012 in) US	59.962 - 59.978 mm (2.3607 - 2.3613 in)
			0.05 mm (0.0020 in) US	59.942 - 59.958 mm (2.3599 - 2.3605 in)
			0.25 mm (0.0098 in) US	59.742 - 59.758 mm (2.3520 - 2.3527 in)
	Thrust clearance		STD	0.030 - 0.115 mm (0.0012 - 0.0045 in)
	Thrust clearance		Limit	0.25 mm (0.0098 in)
	Oil clearance	#1	STD	0.003 - 0.030 mm (0.00012 - 0.0012 in)
		#1	Limit	0.040 mm (0.0016 in)
		#2	STD	0.012 - 0.033 mm (0.0004 - 0.0012 in)
		#2	Limit	0.045 mm (0.0018 in)
		#3	STD	0.003 - 0.030 mm (0.00012 - 0.0012 in)
		#3	Limit	0.040 mm (0.0016 in)
		#4	STD	0.012 - 0.033 mm (0.0004 - 0.0012 in)
		#4	Limit	0.045 mm (0.0018 in)
		#5	STD	0.010 - 0.031 mm (0.0004 - 0.0012 in)
		#5	Limit	0.040 mm (0.0016 in)
Crankshaft main bearing	Crankshaft main bearing thickness	#1, #3	STD	1.998 - 2.011 mm (0.0787 - 0.0792 in)
			0.03 mm (0.0012 in) US	2.017 - 2.020 mm (0.0794 - 0.0795 in)
			0,05 mm (0.0020 in) US	2.027 - 2.030 mm (0.0798 - 0.0799 in)
			0.25 mm (0.0098 in) US	2.127 - 2.130 mm (0.0837 - 0.0839 in)
		#2, #4, #5	STD	2.000 - 2.013 mm (0.0787 - 0.0793 in)
			0.03 mm (0.0012 in) US	2.019 - 2.022 mm (0.0795 - 0.0796 in)
			0.05 mm (0.0020 in) US	2.029 - 2.032 mm (0.0799 - 0.0800 in)
			0.25 mm (0.0098 in) US	2.129 - 2.132 mm (0.0838 - 0.0839 in)