Inspect cylinders with a light probe

AR01.00-P-0200V

Inspect cylinders with a light probe

15.11.2019

Engine

272 in model 171

1

Cylinder inspection lamp

2

Flexible endoscope (test probe)

 

Remove/install

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

1

Switch off ignition and detach ignition key from the ignition lock

2

Open hood

AR88.40-P-1000V

3

Remove air filter housing

AR09.10-P-1150VA

4

Remove ignition coils

AR15.12-P-2003VA

5

Remove spark plugs



AP15.10-P-1580VA

6

Turn engine at the crankshaft in the direction of engine rotation until the piston of the cylinder to be checked is at BDC

7

Connect cylinder illumination unit (1) and insert flexible endoscope (2) of the cylinder illumination unit through the spark plug threaded hole into the cylinder to be checked



Check

8

Check cylinder barrel, piston crown and valves

General information on inspecting cylinder walls

AH01.00-P-0300-01VA

 If there is "scoring" (wear to the cylinder), the cylinder barrel has become rough and the honing marks are no longer visible.

In case of doubt, remove the cylinder head:



Remove the right cylinder head.

AR01.30-P-5800VA

Remove left cylinder head

AR01.30-P-5800VB

9

Check other cylinders in the same way

10

Install in the reverse order