Subaru Legacy/Outback

1999-2003 of release

Repair and operation of the car



Subaru of Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ Operation manual
+ Routine maintenance
- Engine
   Specifications
   Check of compression pressure in cylinders and tightness of the block
   Diagnostics of a condition of the engine with use of the vacuum gage
   The engine lubrication system - the general information
   + the repair Procedures which are not connected with extraction of the engine from the car - four-cylinder engines
   + the repair Procedures which are not connected with extraction of the engine from the car - six-cylinder engines
   + General and capital repairs of engines
+ Cooling systems, heating
+ Power supply system and release
+ Electric equipment of the engine
+ Manual box and differential
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment




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The engine lubrication system - the general information

The design of the lubrication system and the scheme of distribution of streams are presented on illustrations.

Design of the lubrication system of the 4-cylinder engine

1 — the Stopper
2 — the Washer
3 — the Spring of the reducing valve
4 — the Reducing valve
5 — the Epiploon
6 — the Case of the oil pump
7 — the Internal rotor
8 — the External rotor
9 — the Cover of the oil pump
10 — the Oil filter
11 — the Sealing ring
12 — Assembly of the oil pump
13 — the oil pressure Sensor switch
14 — the Oil-filling mouth
15 — the Sealing ring
16 — the Cover of an oil-filling mouth
17 — the Sealing ring
18 — Deflektornaya a plate
19 — the Sealing ring
20 — Maslozabornik
21 — the Directing tube of the probe of measurement of level of motive oil

22 — the Sealing ring
23 — the case Pallet
24 — the Probe of measurement of level of motive oil
25 — the Drain stopper
26 — Metal laying
27 — Laying

Efforts of a tightening of threaded connections, Nanometer

T1: 5
T2: 5
T3: 6.4
T4: 10
T5: 44
T6: 6.4
T7: 25
T8: 44


Design of the lubrication system of the 6-cylinder engine

1 — Nizhny Novgorod the case pallet
2 — the Magnet
3 — the Drain stopper
4 — Laying
5 — the Tube of the oil heater
6 — the Hose
7 — the Collar
8 — the Sealing ring
9 — the Oil heater
10 — the Connecting tube
11 — the Oil filter
12 — the Reducing valve
13 — Laying of the case of the reducing valve
14 — Central sending to a chain
15 — the Asterisk of a cranked shaft
16 — the Cover of the oil pump
17 — the Internal rotor
18 — the External rotor

19 — the Top section of the pallet of a case
20 — the Stopper
21 — the Sensor switch of pressure of motive oil
22 — the Stopper
23 — Maslozabornik

Efforts of a tightening of threaded connections, Nanometer

T1: 6.4
T2: 7.8
T3: 18
T4: 25
T5: 34
T6: 37
T7: 44
T8: 90


Principle of functioning of the lubrication system of the 4-cylinder engine

1 — the Full-line oil filter
2 — the Oil pump
3 — Maslozabornik
4 — the Camshaft
5 — the Roller

6 — the Yoke
7 — a yoke Axis
(a) Perepuskna the valve on 157 kPas
(b) The reducing valve on 490 kPas


Principle of operation of the lubrication system of the 6-cylinder engine

1 — the Oil receiver with the mesh filter
2 — the Oil pump
3 — the Case of the reducing valve
4 — the Regulator of a tension of the right chain
5 — the Oil cooler
6 — the Full-line oil filter
7 — the Sensor switch of pressure of motive oil

8 — the Camshaft
9 — the Cranked shaft
10 — the Lower intermediate asterisk
11 — Top an intermediate asterisk
12 — the Regulator of a tension of the left chain
13 — the Throttle


The scheme of distribution of streams of oil in the 4-cylinder engine

 


The scheme of distribution of streams of oil in the 6-cylinder engine

 


Oil pump

For supply of greasing in the engine the oil pump of rotor type in which working chamber there are internal and external rotors entered into continuous gearing is used. The drive of the pump is organized directly from a cranked shaft of the engine. Rotors and a cover of the pump are made of a ceramic-metal alloy. Rotation of the internal rotor given from a cranked shaft forces to be turned an external rotor, thus, at the expense of an asymmetric arrangement of rotors and distinction in number of teeths, the size of a working gap between them changes that provides a necessary pressure of a working body. Motive oil is soaked up in big space at entrance port of a pump chamber and pumped over by rotors to final port. In process of rotation of rotors volume for an intake of oil is narrowed therefore the compressed oil under pressure is pushed out through from the outlet. Pressure of motive oil is regulated by the reducing valve which is built in the oil pump and located in close proximity to an exhaust outlet. At increase of pressure developed by the pump to a certain level the reducing valve opens, and excess oil comes back to inlet port.

The motive oil forced by the pump moves to bearings distributive and cranked in bulk, and also to the other block elements needing greasing and effective cooling, and also in the demanded proportions is distributed between the GRM components of heads of cylinders.

Design of the oil pump of the 4-cylinder engine

1 — the Internal rotor
2 — the External rotor
3 — the Epiploon
4 — the Case
5 — the Cover

6 — the Cap
7 — Laying
8 — the Spring of the reducing valve
9 — the Reducing valve on 490 kPas


Design of the oil pump of the 6-cylinder engine

1 — the Internal rotor
2 — the External rotor
3 — the Cover
4 — the Case of the reducing valve

5 — the Cap
6 — Laying
7 — the Spring of the reducing valve
8 — the Reducing valve on 490 kPas


Full-line oil filter

For purification of motive oil the full-line oil filter which working element is made of a wax paper is used. For increase in the effective area of a filtration the filtering element has a special corrugated design. The valve providing free pass of oil in case of violation of passability of the filtering element is provided in the filter perepuskny.

Design of a full-line oil filter

1 — the Epiploon
2 — the filter Case

3 — Perepuskna the valve
4 — the Corrugated element


Sensor switch of pressure of motive oil

The sensor switch of pressure of motive oil is located in the top part from the forward party of the right semi-block and serves for control of pressure of oil and serviceability of functioning of the oil pump.

Lack of instant rise in pressure of motive oil directly after inclusion of ignition leads to that the sensor switch diaphragm which is wrung out by a spring (with the effort equivalent to pressure in 0.15 kgfs/cm 2) towards the block of cylinders, closes contacts of a chain of the control lamp which is built in an instrument guard.

After pressure rises to a preset value, the diaphragm is displaced, overcoming spring resistance, and the chain of a control lamp is disconnected.

Design of the sensor switch of pressure of motive oil

1 — Dot contact
2 — the Diaphragm
3 — the Spring

4 — the Press fitting
5 — the Plug


4-cylinder models

The pallet of a case is attached to the block of cylinders with use for tightness of liquid pro-masonry mastic. The oil receiver is located on the middle of the pallet of a case and equipped with the mesh filter serving for elimination of alien particles which can contain in motive oil. The tube going from an oil receiver is connected to the soaking-up opening of the oil pump around the right semi-block.

In the case pallet, is closer to the block of cylinders, the deflektorny plate intended for stabilization of level of motive oil and strengthening of the pallet of a case is provided.

Design of the pallet of a case of the 4-cylinder engine

1 — the oil receiver Equipped with the mesh filter
2 — the Directing tube of the probe of measurement of level of motive oil
3 — Deflektornaya a plate
4 — the Probe of measurement of level of motive oil

a — Nizhny Novgorod level
b — the Top level (for the hot engine)
with — the Top level (for the cold engine)


6-cylinder models

On 6-cylinder engines the 2-section pallet of a case which top section is made of an aluminum alloy is installed, and lower represents a stamped steel plate. In the top section of the pallet the deflektorny plate intended for stabilization of level of motive oil is pressed. The magnet fixed in the lower part of the pallet serves for concentration and keeping of the metal particles getting to the pallet.

The basic arm of a maslozabornik fastens to the top section of the pallet of a case. Sealing of a joint of a maslozaborny tube with the oil pump is provided due to application of a sealing ring. The oil receiver equipped with the mesh filter is located in the center of back part of the pallet of a case where fluctuations of level of oil are minimum.

Design of the pallet of a case of the 6-cylinder engine

1 — the Top section
2 — the oil receiver Equipped with the mesh filter
3 — the Lower section

4 — the Sealing ring
5 — the Magnet