Checking and Adjustment Values (X 18 XE, X 20 XEV, C 20 SEL, C 22 SEL)
|
Engine |
|
X 18 XE X 20 XEV |
C 20 SEL, C 22 SEL |
|
Valve clearance |
|
Hydraulic valve lash adjustment: no adjustment necessary |
|
Spark plug electrode gap |
mm |
0.9 to 1.1 |
0.7 to 0.9 |
|
Compression pressure |
kPa (bar) |
1200 to 1500 (12 to 15) |
|
|
|
|
|
|
The pressure difference between the individual cylinders in the entire engine should not exceed 100 kPa (1 bar). |
|
Pressure loss check |
|
Pressure loss per cylinder with engine in perfect condition must not be more than 25% |
Checking and Adjustment Values (Continued)
|
Engine |
|
X 18 XE X 20 XEV |
C 20 SEL |
C 22 SEL |
|
Idle speed |
|
|
|
|
|
|
|
|
Manual transmission |
rpm |
670 to 1030 1) |
752 |
800 to 900 |
|
|
|
|
Automatic transmission |
rpm |
670 to 1030 1) |
816 |
800 to 900 |
|
Ignition timing at idle speed |
|
1) |
1) |
1) |
|
CO content |
Vol. % |
1) |
1) |
1) |
1) Correction and adjustment via TECH 2 in accordance with checking instructions. When checking the idle speed and the CO content, ensure the following:
- Electrical consumers switched off
- Engine at operating temperature (oil temperature ≥ 80 ° C / 176 ° F).
- Selector lever in position "P" with automatic transmission
- CO test with 2,800 to 3,200 rpm without load
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