Engine Mechanical (H4SO - 2.5L SOHC): Diagnosis Subaru Outback BR

INSPECTION

Scheme 32

Scheme 33

1. After warming-up the engine, turn the ignition switch to OFF.
2. Make sure that the battery is fully charged.
3. Remove the fuse of fuel pump from main fuse box.
4. Start the engine and run it until it stalls.
5. After the engine stalls, crank it for five more seconds.
6. Turn the ignition switch to OFF.
7. Remove all spark plugs. Ref. to «REMOVAL»(ref-371885-S08066895552010091900000) , Spark Plug.
8. Fully open the throttle valve.
9. Check the starter motor for satisfactory performance and operation.
10. Install the compression gauge to the spark plug hole. NOTE: When using a screw-in type compression gauge, the screw should be less than 18 mm (0.71 in) long.
11. Crank the engine by starter motor and read the value when the needle of the compression gauge becomes stable. NOTE: Perform at least two measurements per cylinder, and make sure that the values are correct. If the compression pressure is out of standard, check or adjust the pistons, valves and cylinders. Compression (fully open throttle): Standard 1,020 - 1,275 kPa (10.4 - 13.0 kgf/cm 2 , 148-185 psi) Difference between cylinders 49 kPa (0.5 kgf/cm 2 , 7 psi) or less
12. After inspection, install the related parts in the reverse order of removal.

1. Before checking the idle speed, check the following item: Check the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly. Check the malfunction indicator light does not illuminate.
2. Warm up the engine.
3. Read the engine idle speed using Subaru Select Monitor. Ref. to «READ CURRENT DATA FOR ENGINE (NORMAL MODE)»(ref-371914-S24953327312010091900000) , OPERATION, Subaru Select Monitor. NOTE: Idle speed cannot be adjusted manually, because the idle speed is automatically adjusted. If idle speed is out of standard, refer to the General Diagnosis Table under "Engine Control System". Ref. to «BASIC DIAGNOSTIC PROCEDURE»(ref-371914-S35680276532010091900000) . Check the idle speed when no-loaded. (Headlight, heater fan, rear defroster, radiator fan, A/C and etc. are OFF) Idle speed (No load, and for CVT model, select lever in "P" or "N" range, for MT model, gear shift lever in neutral position.): Standard 675±100 RPM (CVT model) 650±100 RPM (MT model) Check the idle speed when loaded. (Turn the A/C switch to "ON" and operate the compressor for at least one minute before measurement.) Idle speed (A/C on, and for CVT model, select lever in "P" or "N" range, for MT model, gear shift lever in neutral position.): Standard 700 - 850±100 RPM

Scheme 34

Scheme 35

1. Release the fuel pressure. Ref. to «RELEASING OF FUEL PRESSURE»(ref-371892-S35824116682010091900000) , PROCEDURE, Fuel.
2. Open the fuel filler lid and remove the fuel filler cap.
3. Disconnect the fuel delivery hose and connect the fuel pressure gauge. CAUTION: Be careful not to spill fuel. Catch the fuel from hoses using a container or cloth. Attach ST to the fuel delivery pipe and push ST1 in the direction of arrow mark to disconnect the quick connector of the fuel delivery hose. ST 42099AE000 QUICK CONNECTOR RELEASE Connect the fuel pressure gauge with ST2 and ST3. NOTE: ST2 is a SUBARU genuine part. ST2 42075AG690 FUEL HOSE ST3 18471AA000 FUEL PIPE ADAPTER
4. Start the engine.
5. Measure the fuel pressure after warming up the engine. NOTE: The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0.2 kgf/cm 2 , 1 to 3 psi) higher than standard values during high-altitude operations. Check or replace the fuel pump and fuel delivery line if the fuel pressure is out of the standard. Fuel pressure: Standard 338-348 kPa (3.4 - 3.5 kgf/cm 2 , 49 - 50 psi)
6. After inspection, install the related parts in the reverse order of removal.

Note. Inspection and adjustment of valve clearance should be performed while engine is cold.

Scheme 36

Scheme 37

Scheme 38

1. Lift up the vehicle.
2. Remove the under cover. Ref. to «REMOVAL»(ref-371913-S09538241932010091900000) , Front Under Cover.
3. Lower the vehicle.
4. Disconnect the ground cable from battery.
5. Remove the timing belt cover LH.
6. Remove the fuel injector. Ref. to «REMOVAL»(ref-371892-S17572077042010091900000) , Fuel Injector.
7. When inspecting #1 and #3 cylinders Disconnect the ignition coil from spark plug on RH side. Ref. to «RH SIDE»(ref-371885-S25939088142010091900000) , REMOVAL, Spark Plug. Place a suitable container under the vehicle. Disconnect the PCV hose from the rocker cover RH. Remove the bolts, then remove the rocker cover RH.
8. When inspecting #2 and #4 cylinders Disconnect the ignition coil from spark plug on LH side. Ref. to «LH SIDE»(ref-371885-S37574733352010091900000) , REMOVAL, Spark Plug. Place a suitable container under the vehicle. Disconnect the PCV hose from the rocker cover LH. Remove the bolts, then remove the rocker cover LH.
9. Set #1 cylinder piston to top dead center of compression stroke by rotating the crank pulley clockwise using the socket wrench. NOTE: When the arrow mark (A) on cam sprocket LH is at the top position, the #1 cylinder piston is at top dead center of the compression stroke.
10. Measure #1 cylinder valve clearance by using thickness gauge (A). NOTE: Insert the thickness gauge (A) in as horizontally as possible with respect to the valve stem end face. Lift up the vehicle, and then measure the exhaust valve clearances. If the measured value is not within the inspection value, take notes of the value in order to adjust the valve clearance later on. Valve clearance (inspection value): Intake 0.20±0.04 mm (0.0079±0.0016 in) Exhaust 0.25±0.04 mm (0.0098±0.0016 in)
11. Measure the valve clearance in #3, #2 and #4 cylinder in the same measurement procedure as #1 cylinder in this order. NOTE: Be sure to set the cylinder pistons to their respective top dead centers on compression stroke before measuring valve clearances. By rotating the crank pulley clockwise every 180° from the state that #1 cylinder piston is on the top dead center of compression stroke, #3, #2 and #4 cylinder pistons come to the top dead center of compression stroke in this order.
12. If necessary, adjust the valve clearance. Ref. to «ADJUSTMENT»(ref-371888-S32685706542010091900000) , Valve Clearance.
13. After inspection, install the related parts in the reverse order of removal. NOTE: Use a new rocker cover gasket.

1. Check that the pipes, hoses, connectors and clamps are securely connected.
2. Check that the engine coolant is up to specified level.
3. Check CVTF is at the specified level. (CVT model)
4. Start the engine and check for exhaust gas leakage, engine coolant leakage, fuel leakage, noise or vibration.

Scheme 39

1. Change the front hood damper mounting position from (A) to (B), and completely open the front hood. Tightening torque: 20 N.m (2.0 kgf-m, 14.8 ft-lb)
2. Disconnect the ground cable from battery.
3. Remove the radiator main fan motor assembly and radiator sub fan motor assembly. Ref. to «REMOVAL»(ref-371897-S40152445532010091900000) , Radiator Main Fan and Fan Motor. Ref. to «REMOVAL»(ref-371897-S13711338592010091900000) , Radiator Sub Fan and Fan Motor.
4. Lift up the vehicle.
5. Remove the under cover. Ref. to «REMOVAL»(ref-371913-S09538241932010091900000) , Front Under Cover.
6. Remove the front exhaust pipe. Ref. to «REMOVAL»(ref-371916-S00119671682010091900000) , Front Exhaust Pipe.
7. Lower the vehicle.
8. Support the engine with a lifting device and wire ropes.
9. Remove the stopper rod.
10. Remove the bolt and nut which secure engine mounting to the cradle.
11. Lift up the vehicle. CAUTION: When lifting up the vehicle, raise up wire ropes at the same time.
12. Remove the bolts which secure the engine mounting onto the engine, and remove the engine mounting.

Scheme 40

1. Set the engine mounting, and tighten the bolts which hold engine mounting to the engine. Tightening torque: 58 N.m (5.9 kgf-m, 42.8 ft-lb)
2. Lower the vehicle. CAUTION: When lifting down the vehicle, lower wire ropes at the same time.
3. Attach the bolts and nuts which secure engine mounting to the cradle. Tightening torque: 60 N.m (6.1 kgf-m, 44.3 ft-lb)
4. Install the stopper rod. Tightening torque: 36 N.m (3.7 kgf-m, 26.6 ft-lb)
5. Remove the lifting device and wire ropes.
6. Lift up the vehicle.
7. Install the front exhaust pipe. Ref. to «INSTALLATION»(ref-371916-S33619852892010091900000) , Front Exhaust Pipe.
8. Install the under cover. Ref. to «INSTALLATION»(ref-371913-S15712020302010091900000) , Front Under Cover.
9. Lower the vehicle.
10. Install the radiator main fan motor assembly and radiator sub fan motor assembly. Ref. to «INSTALLATION»(ref-371897-S04312627002010091900000) , Radiator Main Fan and Fan Motor. Ref. to «INSTALLATION»(ref-371897-S29642268602010091900000) , Radiator Sub Fan and Fan Motor.
11. Connect the ground cable to battery.
12. Change the front hood damper mounting position from (B) to (A), and close the front hood. Tightening torque: 20 N.m (2.0 kgf-m, 14.8 ft-lb)

Scheme 41

Scheme 42

1. Remove the front cushion rubber from the engine mounting bracket.
2. Remove the front cushion rubber from the front mounting bracket.

Check that the engine mounting does not have deformation, cracks and any other damage.

Scheme 43

1. After removing the engine from vehicle body, attach the ST to the engine as shown in the figure. ST1 498457000 ENGINE STAND ADAPTER RH ST2 498457100 ENGINE STAND ADAPTER LH ST3 499817100 ENGINE STAND
2. In this article the procedures described under each index are all connected and stated in order. Engine overhaul will be completed when you go through all steps in the procedure. Therefore, in this article, to conduct the particular procedure within the flow of a section, you need to go back and conduct the procedure described previously in order to do that particular procedure.

1. Make sure the V belt is not worn or damaged.
2. Check the tension of the front side belt. Ref. to «INSPECTION»(ref-371888-S29763913392010091900000) , V-belt.

Check the timing belt cover for damage.

1. Check the cam sprocket teeth for abnormal wear and scratches.
2. Make sure there is no free play between cam sprocket and key.
3. Check the cam sprocket protrusion used for sensor for damage and contamination of foreign matter.

1. Check the crank sprocket teeth for abnormal wear and scratches.
2. Make sure there is no free play between crank sprocket and key.
3. Check the crank sprocket protrusion used for sensor for damage and contamination of foreign matter.

Note. The "RANK" shown in the chart shows the possibilities of the cause of trouble in order from "Very often" to "Rarely".

A - Very often

B - Sometimes

C - Rarely

SYMPTOMS CHART

SYMPTOM CHART