Engine Mecahnical - 2.5L - SOHC: Specifications — Subaru Impreza GD/GC/GG рестайлинг (2002-2005)

SPECIFICATIONS

Note. US: Undersize OS: Oversize

Engine	Type		Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine
	Valve arrangement		Belt driven, single over-head camshaft, 4-valve/cylinder
	Bore x Stroke	Mm (in)	99.5 x 79.0 (3.917 x 3.110)
	Displacement	Cm 3 (cu in)	2,457 (150)
	Compression ratio		10.0
	Compression pressure (at 200 - 300 rpm)	KPa (kg/cm 2 , psi)	1,079 - 1,275 (11.0 - 13.0, 156 - 185)
	Number of piston rings		Pressure ring: 2, Oil ring: 1
	Intake valve timing	Opening	1°BTDC
	Intake valve timing	Closing	51°ABDC
	Exhaust valve timing	Opening	50° BBDC
	Exhaust valve timing	Closing	6° ATDC
	Valve clearance	Intake mm (in)	0.20 ± 0.02 (0.0079 ± 0.0008)
	Valve clearance	Exhaust mm (in)	0.25 ± 0.02 (0.0098 ± 0.0008)
	Idling speed [At neutral position on MT, or "P" or "N" position on AT]	Rpm	No load	650 ± 100 (MT vehicles) 700 ± 100 (AT vehicles)
		Rpm	A/CON	850 ± 100
	Firing order		1 - 3 - 2 - 4
	Ignition timing	BTDC/rpm	MT: 10° ± 8°/650 AT:15° ± 8°/700
Belt tension adjuster	Protrusion o1 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 bushing I.D.			18.00 -18.08 mm (0.7087- 0.7118 in)
	Clearance between spacer and bushing		STD	0.025 - 0.125 mm (0.0010 - 0.0049 in)
	Clearance between spacer and bushing		Limit	0.175 mm (0.0069 in)
	Side clearance of spacer		STD	0.20 - 0.55 mm (0.0079 - 0.0217 in)
	Side clearance of spacer		Limit	0.81 mm (0.0319 in)
Valve rocker arm	Clearance between shaft and arm		STD	0.020 - 0.054 mm (0.0008 - 0.0021 in)
Valve rocker arm	Clearance between shaft and arm		Limit	0.10 mm (0.0039 in)
Camshaft	Bend limit			0.025 mm (0.0010 in)
	Thrust clearance		STD	0.030 - 0.090 mm (0.0012 - 0.0035 in)
	Thrust clearance		Limit	0.10 mm (0.0039 in)
	Cam lobe height	Intake	STD	39.485 - 39.585 mm (1.5545 - 1.5585 in)
		Intake	Limit	39.385 mm (1.5506 in)
		Exhaust	STD	39.257 - 39.357 mm (1.5455 - 1,5495 in)
		Exhaust	Limit	39.157 mm (1.5416 in)
	Camshaft journal O.D.			31.928 - 31.945 mm (1.2570 - 1.2577 in)
	Camshaft journal hole I.D. (cylinder head)			32.000 - 32.018 mm (1.2598 - 1.2605 in)
	Oil clearance		STD	0.055 - 0.090 mm (0.0022 - 0.0035 in)
	Oil clearance		Limit	0.10 mm (0.0039 in)
Cylinder head	Surface warpage limit (mating with cylinder block)			0.05 mm (0.0020 in)
	Surface grinding limit			0.1 mm (0.004 in)
	Standard height			97.5 mm (3.84 in)
Valve seat	Refacing angle			90°
	Contacting width	Intake	STD	1.1 mm (0.043 in)
		Intake	Limit	1.8 mm (0.071 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)
	Protrusion above head		Intake	20.0 - 20.5 mm (0.787 - 0.807 in)
	Protrusion above head		Exhaust	16.5-17.0 mm (0.650 - 0.669 in)
Valve	Head edge thickness	Intake	STD	1.0 mm (0.039 in)
		Intake	Limit	0.6 mm (0.024 in)
		Exhaust	STD	1.2 mm (0.047 in)
		Exhaust	Limit	0.6 mm (0.024 in)
	Stem diameter		Intake	5.950 - 5.965 mm (0.2343 - 0.2348 in)
	Stem diameter		Exhaust	5.945 - 5.960 mm (0.2341 - 0.2346 in)
	Stem oil clearance	STD	Intake	0.035 - 0.062 mm (0.0014 - 0.0024 in)
		STD	Exhaust	0.040 - 0.067 mm (0.0016 - 0.0026 in)
		Limit		0.15 mm (0.0059 in)
	Overall length		Intake	120.6 mm (4.75 in)
	Overall length		Exhaust	121.7 mm (4.79 in)
Valve spring	Free length			54.30 mm (2.1378 in)
	Squareness			2.5°, 2.4 mm (0.094 in)
	Tension/spring height		Set	214 -246 N (21.8 - 25.1 kgf, 48.1 - 55.3 lb)/ 45.0 mm (1.772 in)
	Tension/spring height		Lift	526 - 582 N (53.6 - 59.3 kgf, 118 - 130.8 lb)/ 34.7 mm (1.366 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)
	Inner diameter		A	99.505 - 99.515 mm (3.9175 - 3.9179 in)
	Inner diameter		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 - 0.030 mm (0.0004 - 0.0012 in)
	Piston clearance		Limit	0.050 mm (0.0020 in)
	Boring limit			0.5 mm (0.020 in)
Piston	Outer diameter	STD	A	99.485 - 99.495 mm (3.9167 - 3.9171 in)
		STD	B	99.475 - 99.485 mm (3.9163 - 3.9167 in)
		0.25 mm (0.0098 in) OS		99.725 - 99.735 mm (3.9262 - 3.9266 in)
		0.50 mm (0.0197 in) OS		99.975 - 99.985 mm (3.9360 - 3.9364 in)
	Standard inner diameter of piston pin hole			23.000 - 23.006 mm (0.9055 - 0.9057 in)
Piston pin	Outer diameter			22.994 - 23.000 mm (0.9053 - 0.9055 in)
	Standard clearance between piston pin and piston			0.004 - 0.008 mm (0.0002 - 0.0003 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 - 0.35 mm (0.0079 - 0.0138 in)
		Top ring	Limit	1.0 mm (0.039 in)
		Second ring	STD	0.37 - 0.52 mm (0.0146 - 0.0205 in)
		Second ring	Limit	1.0 mm (0.039 in)
		Oil ring	STD	0.20 - 0.50 mm (0.0079 - 0.0197 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 or twist per 100 mm (3.94 in) in length		Limit	0.10 mm (0.0039 in)
	Side clearance at large end		STD	0.070 - 0.330 mm (0.0028 - 0.0130 in)
	Side clearance at large end		Limit	0.4 mm (0.016 in)
Connecting rod bearing	Oil clearance		STD	0.012 - 0.038 mm (0.0005 - 0.0014 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		Less than 0.020 mm (0.0008 in)
	Crank pin and crank journal	Surface grinding limit		0.250 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 (2.0446 - 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	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, #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)
	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 (0.0001-0.0012 in)
		#1	Limit	0.040 mm (0.0016 in)
		#2	STD	0.012 - 0.033 mm (0.0005 - 0.0013 in)
		#2	Limit	0.045 mm (0.0018 in)
		#3	STD	0.003 - 0.030 mm (0.0001 - 0.0012 in)
		#3	Limit	0.040 mm (0.0016 in)
		#4	STD	0.012 - 0.033 mm (0.0005 -0.0013 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 bearing	Crankshaft bearing	#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)

Engine Specifications

Scheme 235

Scheme 235: TIMING BELT

Scheme 236

Scheme 236: CYLINDER HEAD AND CAMSHAFT

Scheme 237

Scheme 237: VALVE ROCKER ASSEMBLY

Scheme 238

Scheme 238: CYLINDER HEAD AND VALVE ASSEMBLY

Scheme 239

Scheme 239: CYLINDER BLOCK

Scheme 240

Scheme 240: CRANKSHAFT AND PISTON

Scheme 241

Scheme 241: ENGINE MOUNTING

TORQUE SPECIFICATIONS

Application			Ft. Lbs. (N.m)
A/C Pressure Hose			18 (25)
Camshaft Cap Bolt (1)
Step 1 - Rocker Arm Shaft Bolt (2)			18 (25)
Step 2 - Bolt 11-16			13 (18)
Step 3 - Bolt 3-10			(3)
Step 4 - Bolt 1-2			(3)
Camshaft Sprocket Bolt			58 (78)
Connecting Rod Nut			33 (45)
Crankcase Service Hole Plug			51 (69)
Crankshaft Pulley Bolt
Used Bolt
Step 1			32 (44)
Step 2			(4) 131 (177)
New Bolt
Step 1			32 (44)
Step 2			Tighten An Additional 65-75 Degrees
Cylinder Block Connecting Bolt
Step 1 (5)			11 (15)
Step 2 (6)			11 (15)
Step 3 (5)			Tighten An Additional 90 Degrees
Step 4 (6)			Tighten An Additional 90 Degrees
Step 5 (7)
Bolt "A"-"G"			18 (25)
Bolt "H"			(8)
Cylinder Head Bolt (9)
Step 1 - All Bolt			21 (29)
Step 2 - All Bolt			51 (69)
Step 3 - All Bolt			Loosen 180 Degrees
Step 4 - All Bolt			Loosen 180 Degrees
Step 5 - Bolt 1 & 2			25 (34)
Step 6 - Bolt 3-6			11 (15)
Step 7 - All Bolt			Tighten An Additional 80-90 Degrees
Step 8 - All Bolt			Tighten An Additional 80-90 Degrees
Drive Belts
Front Belt
Lock Bolt			18 (25)
Slider Bolt			(10)
Rear Belt - Lock Nut			17 (23)
Drive Plate/Flywheel Bolt			53 (72)
Engine-To-Transmission Bolt			37 (50)
Engine Coolant Temperature Sensor			13 (18)
Engine Ground Terminal-To-Intake Manifold Bolt			14 (19)
Engine Mounts
Bracket Bolt			26 (35)
Lower Nut			51 (69)
Upper Nut			30 (40)
Front Exhaust Pipe-To
Cylinder Head			22 (30)
Catalytic Converter			22 (30)
Fuel Injector Pipe Bolt			14 (19)
Fuel Pipe Protector Bolt			14 (19)
Intake Manifold Bolt			18 (25)
Intake Manifold Plug			13 (18)
Knock Sensor Bolt			18 (25)
Oil Drain Plug			32 (44)
Oil Filter Connector			41 (55)
Oil Pressure Relief Valve Plug			32 (44)
Oil Pressure Switch			18 (25)
Oxygen Sensor			15 (20)
PCV Valve			18 (25)
Pitching Stopper-To
Body			43 (58)
Engine			37 (50)
Power Steering Pump Bolt			15 (20)
Rocker Arm Shaft Bolt (2)			18 (25)
Spark Plugs			15 (20)
Throttle Body Bolt			16 (22)
Timing Belt Idler Bolt			29 (39)
Timing Belt Tension Adjuster Bolt			29 (39)
Timing Belt Tensioner Bracket Bolt			18 (25)
INCH Lbs. (N.m)
Air Assist Injector Solenoid Valve Bolt			57 (6)
Camshaft Position Sensor Bolt			57 (6)
Crankcase Service Hole Cover Bolt			57 (6)
Crankshaft Position Sensor Bolt			57 (6)
Cylinder Head Cover Bolt			44 (5)
Fuel Pipe Assembly Bolt			44 (5)
Ignition Coil Bolt			57 (6)
Idle Air Control Solenoid Valve Bolt			18 (2)
Intake Air Temperature/Pressure Sensor Bolt			27 (3)
Oil Baffle Plate Bolt			57 (6)
Oil Cooler Pipe & Hose Assembly			57 (6)
Oil Filler Duct Bolt			57 (6)
Oil Pan Bolt			44 (5)
Oil Pump Cover Screws			44 (5)
Oil Pump Bolt			57 (6)
Oil Strainer Bolt			89 (10)
Purge Control Solenoid Valve Bolt			57 (6)
Rocker Arm Adjuster Lock Nut			89 (10)
Rocker Shaft Support Bolt			44 (5)
Thermostat Housing Bolt			57 (6)
Throttle Position Sensor Bolt			18 (2)
Timing Belt Guide Bolt			89 (10)
Water By-Pass Bolt			57 (6)
Water Pump Bolt (11)
Step 1			106 (12)
Step 2			106 (12)
(1) For camshaft cap bolt identification (Scheme 243) (2) Tighten rocker arm shaft bolts in sequence. (Scheme 244) (3) Tighten to 89 INCH lbs. (10 N.m). (4) Confirm tightening angle of crankshaft pulley bolt is 65 degrees or more. If not, replace bolt. (5) Tighten 10 mm cylinder block connecting bolts "A"-"D" in sequence. (Scheme 245) (6) Tighten 10 mm cylinder block connecting bolts "E"-"J" in sequence. (Scheme 246) (7) Tighten 6 mm and 8 mm cylinder block connecting bolts "A"-"G" in sequence. (Scheme 247) (8) Tighten to 53 INCH lbs. (6 N.m). (9) Tighten cylinder head bolts in sequence. (Scheme 248) (10) Tighten to 71 INCH lbs. (8 N.m). (11) Tighten water pump bolts in sequence. see scheme 250

(1)	For camshaft cap bolt identification (Scheme 243)

(2)	Tighten rocker arm shaft bolts in sequence. (Scheme 244)

(3)	Tighten to 89 INCH lbs. (10 N.m).

(4)	Confirm tightening angle of crankshaft pulley bolt is 65 degrees or more. If not, replace bolt.

(5)	Tighten 10 mm cylinder block connecting bolts "A"-"D" in sequence. (Scheme 245)

(6)	Tighten 10 mm cylinder block connecting bolts "E"-"J" in sequence. (Scheme 246)

(7)	Tighten 6 mm and 8 mm cylinder block connecting bolts "A"-"G" in sequence. (Scheme 247)

(8)	Tighten to 53 INCH lbs. (6 N.m).

(9)	Tighten cylinder head bolts in sequence. (Scheme 248)

(10)	Tighten to 71 INCH lbs. (8 N.m).

(11)	Tighten water pump bolts in sequence. see scheme 250

TORQUE SPECIFICATIONS

Scheme 242

Scheme 243

Scheme 244

Scheme 245

Scheme 246

Scheme 247

Scheme 248

Engine Mecahnical - 2.5L - SOHC: Specifications Subaru Impreza GD/GC/GG рестайлинг

SPECIFICATIONS

Scheme 235

Scheme 236

Scheme 237

Scheme 238

Scheme 239

Scheme 240

Scheme 241

TORQUE SPECIFICATIONS

Scheme 242

Scheme 243

Scheme 244

Scheme 245

Scheme 246

Scheme 247

Scheme 248

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