Basic Engine, 4-CYLINDER Petrol: Overview Saab 9-3 I

Identifying Engine Assembly. Scheme 47

GENERAL DATA SPECIFICATIONS

Identifying Cylinder Block. Scheme 48

Description

The hydraulic mounting consists of two chambers filled with a special damping fluid. There is a diaphragm and a passage between the two chambers where the length and cross-sectional area of the passage determines the damping characteristics of the mounting. The diaphragm absorbs the forces generated by the normal small movements of the engine.

The affect of the diaphragm is not sufficient to dampen more pronounced engine movement. Fluid is forced from the upper chamber to the lower chamber, equalizing the pressure. This gives the hydraulic mounting a progressive damping action, resulting in increased resistance with increased load.

Identifying Engine Assembly. Scheme 49

Beware of injuries like cuts and scratches caused by these sharp ends!

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

Scheme 63

1. Cover the wings and remove the battery. Make a note of the radio code if necessary. (Scheme 50): Opening Coolant Drain Plug And Drain Coolant
2. Open the coolant drain plug and drain the coolant. Remove the cap from the expansion tank to speed up draining.
3. Remove the air cleaner complete with hoses. Remove the engine cover or, alternatively, the resonator. (Scheme 51): Removing Air Cleaner Complete With Hoses
4. Disconnect the throttle cable and move it aside.
5. Undo the cruise control wire from the throttle body, unplug the cruise control electrical connection, undo the retaining screws and remove the cruise control unit complete with cable.
6. Detach and plug the fuel hoses. Use tool part no. 83 95 261.
7. Detach the tank ventilation hose and bend it to one side.
8. Detach the pressure sensor and lay it on the engine (turbo).
9. Detach the vacuum hose for the secondary air injection (certain cars) and the vacuum hose for the brake servo from the intake manifold.
10. Remove the boost pressure control valve and lay it on the engine (turbo). Remove the heat shield (turbo). (Scheme 52): Removing Boost Pressure Control Valve And Lay
11. Relieve the pressure on the belt tensioner using a ratchet handle extension and insert a 6 mm drill into the hole. (Scheme 53): Relieving Pressure On Belt Tensioner IMPORTANT: Exercise the utmost care to ensure that the belt tensioner does not break at its end position!
12. Remove the power steering pump from its bracket and place it out of the way.
13. Remove the pressure pipe between the charge air cooler and the throttle body (turbo).
14. Detach the coolant hoses. (Scheme 54): Detaching Coolant Hoses
15. Remove the hose for the secondary air injection (certain cars).
16. Unplug the A/C compressor electrical connection and remove the top retaining bolt on the compressor.
17. Remove the positive cable from the plus terminal (follows with the engine) and undo the ground cable on the gearbox. (Scheme 55): Removing Positive Cable From Plus Terminal
18. Remove the ignition lead and the electrical connections on the ignition coil (B204i).
19. Unplug the gearbox electrical connectors and lay them on the engine.
20. Disconnect the oxygen sensor cable. (Scheme 56): Disconnecting Oxygen Sensor Cable
21. Detach the ventilation hose from the gearbox and plug the hole (aut.).
22. Detach the gear selector cable (aut.) or alternatively separate the selector rod (man).
23. Depress the clutch pedal approx. 50 mm with a brake pedal clamp. This will prevent brake fluid from running out of the reservoir. Remove the retaining clip from the slave cylinder and disconnect the pressure pipe. Replace the retaining clip. (Scheme 57): Removing Retaining Clip From Slave Cylinder And Pressure Pipe
24. Remove the glove box (LHD), fold back the floor mat and undo the central locking system control module. Detach the wiring harness to the engine. (Scheme 58): Removing Glove Box (LHD)
25. Withdraw the wiring harness through the grommet to the engine bay and place it on top of the engine. Don't forget the cable to the boost pressure control valve (turbo). (Scheme 59): Identifying Boost Pressure Control Valve (Turbo)
26. Undo the hub centre-nuts on both sides and raise the car. (Scheme 60): Removing Both Front Wheels And Hub Centre-Nuts
27. Remove both the front wheels and remove the hub centre-nuts. Undo the brake callipers and hang them from the MacPherson struts. Undo the track rod end nuts on both sides.
28. Remove the covers in the wheel housings and the air shields.
29. Undo the clamp between the front pipe and the intermediate pipe. (Scheme 61): Identifying Front Exhaust Pipe From Exhaust Manifold
30. Detach the front exhaust pipe from the exhaust manifold or, alternatively, the turbocharger.
31. Detach the catalytic converter from its mounting and remove the exhaust pipe.
32. Place a vessel under the gearbox and detach the oil hoses, plug the holes. Place the hoses out of the way (aut.).
33. Remove the pipe between the turbocharger and the charge air cooler (turbo). (Scheme 62): Removing Pipe Between Turbocharger And Charge Air Cooler
34. Detach the oil hoses to the oil cooler and plug the hoses (turbo).
35. Place the lifting trolley under the car so that the supports are centered under the front engine mountings and the gearbox. Remove the bolts on the subframe and the front engine mountings. (Scheme 63): Removing Bolts On Subframe And Front Engine Mountings
36. Lower the lifting table and thus also the engine and subframe. Remove the track rods and drive shafts on both sides. Use 89 96 696 Puller. see scheme 135: Identifying Track Rods And Drive Shafts On Both Sides
37. Detach the A/C compressor and hang it from the towing eye.
38. Lower the lifting trolley completely and remove the subframe by undoing the rear engine mounting from the gearbox. see scheme 136: Removing Subframe By Undoing Rear Engine Mounting From Gearbox

The valve gear incorporates hydraulic tappets which balance the valve clearance within a limited working range of 2.05 mm (0.081 in). This range is within 18.75 - 20.8 (0.738-0.819 in) from the camshaft towards the position of the valve.

The valve tappet has two storage chambers and one high-pressure chamber, which is sealed from one of the storage chambers with a spring-loaded ball valve. A return spring in the high-pressure chamber acts on the sliding plunger so that any clearance between the tappet and the base circle of the cam is eliminated. At the same time, the high-pressure chamber expands to compensate for the oil volume lost through leakage in the gap between the plunger and cylinder that occurs at collaring pressure. Under various conditions the hydraulic tappets may give rise to noise (rattling of varying intensity). In most cases, this noise is of a temporary nature and does not require remedial action.

Below is a description of the most common types of noise, their probable cause and any preliminary action that needs to be taken.