Ribbed belt alignment, checking
Check alignment of ribbed belt after replacing the following components
- Power steering pump
- Air conditioner compressor
- Bracket for power steering pump and A/C compressor
Note. To prevent damage to the ribbed belt, check alignment of ribbed belt between A/C compressor and power steering vane pump.
Special tools, testers and auxiliary items required
Scheme 51
- Alignment gauge 3201
Scheme 52
- Spanner Wrench 3212
Test sequence
- Lock carrier pulled toward front --> «Lock carrier, pulling toward front»(ref-289202-S33545844662008062700000) .
- Ribbed belt removed --> «Ribbed belt, removing and installing»(ref-289202-S11016029762008062700000) .
Scheme 53
- Place alignment gauge 3201 on ribbed belt pulley of A/C compressor.
- Ribbed belt pulley of vane pump and ribbed belt pulley of A/C compressor must align.
If ribbed belt pulleys do not align
- Remove bolts - arrows - of ribbed belt pulley for vane pump.
Note. For removing and installing bolts use spanner wrench 3212 to counter hold. Installed location: Writing "front" on ribbed belt pulley indicates direction of travel.
Scheme 54
- Adjust distance between ribbed belt pulley of vane pump to ribbed belt pulley of A/C compressor using spacer discs of 0.5, 1.0 and 1.5 mm, part number .
- Check alignment of ribbed belt pulleys using alignment gauge 3201. Readjust if necessary.
Note. Secure all hose connections using hose clamps appropriate for the model type .
Torque specifications
| Component | Nm |
|---|---|
| Pulley to power steering vane pump | 22 |
Camshaft adjustment, checking
The adjustment of intake camshaft is load and RPM dependent. Oil pressure is switched to respective camshaft adjuster (mechanical adjustment devices) via solenoid valve for camshaft adjustment.
Note. Camshaft adjustment is active only 25 seconds after engine start.
Scheme 55
- Vehicle Diagnosis, Testing and Information System VAS 5051 with VAS 5051/1 (VAS 5051 B version shown as example only)
Test conditions
- Coolant temperature at least 80°C.
- Vehicles with automatic transmission: Selector lever in position P or N.
Test sequence
- Connect Vehicle Diagnostic, Testing and Information System VAS 5051 and select vehicle system "01 - engine electronics". Engine must run at idle for this.
| CAUTION | Test and measuring equipment must always be secured to the rear seat and be operated from there by a second person. If test and measuring instruments are operated from the front passengers seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered. |
Display on VAS 5051
Scheme 56
- In selection - 1 - , press diagnostic function "04- Basic Setting".
Display on VAS 5051
1 - Enter display group
Scheme 57
- Select function "094" in button field - 2 - for "display group number 094" and press Q to confirm input.
Display on VAS 5051
Scheme 58
- Activate basic setting by pressing button A.
- Increase engine speed to approx. 2000 RPM for about 10 seconds.
- Check specified values in display fields - 3 - and - 4 -.
| Display field | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 94: Camshaft adjustment bank 1 (right cyl. bank) and bank 2 (left cyl. bank) | ||||
| Display | Xxxx/min | |||
| Indicated | Engine RPM | Variable valve timing | Camshaft adjustment, Bank 1 | Camshaft adjustment, Bank 2 |
| Operating range | Cs-CM ON Cs-CM OFF | Test OFF Test ON Syst. OK Syst. nOK | Test OFF Test ON Syst. OK Syst. nOK | |
| Specified value | Greater than 2000/min | System OK | System OK | |
If specified value "Syst. OK" is not obtained
- Click on button twice.
Display on VAS 5051
- In selection - 1 - , click on diagnostic function "08 - Read measuring value block".
Display on VAS 5051
1 - Enter display group
- Select function "090" in button field - 2 - for "display group number 090" and press Q to confirm input.
Scheme 59
Display on VAS 5051
Test conditions
- Engine running at idle.
- Check specified values in display fields - 3 - and - 4 -.
| Display field | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 090: Camshaft adjustment in idle position | ||||
| Display | Xxx/min | ° KW | ° KW | |
| Indicated | Engine RPM | Adjustment | Adjustment bank 1 (right cylinder bank) | Adjustment bank 2 (left cylinder bank) |
| Specified value | Xxxx/min | Cs-CM. OFF | 3 to 6° KW | 3 to 6° KW |
- Perform test drive.
- Check specified values in display fields - 3 - and - 4 -.
| Display field | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 090: Camshaft adjustment while driving | ||||
| Display | Xxxx/min | ° KW | ° KW | |
| Indicated | Engine RPM | Adjustment | Adjustment bank 1 (right cylinder bank) | Adjustment bank 2 (left cylinder bank) |
| Specified value | Xxxx/min | Cs-CM. ON | 16 to 25° KW | 16 to 25° KW |
- Press button to end function "08 - Read measuring value block".
If specifications are not obtained
- Check solenoid valves for camshaft adjustment Guided Fault Finding.
Note. If display field indicates a value between 6.0° Crankshaft and 16.0° Crankshaft during a road test, the electrical valve for camshaft adjustment is correctly switching the oil pressure to mechanical camshaft adjuster but the mechanical camshaft adjuster cannot reach its end position (e.g. due to difficulty of movement).