Inspect cylinders with a light probe

AR01.00-G-0200DE

Inspect cylinders with a light probe

17.09.2019

Engine

906.90 in model 000.001

1

Endoscope

 Danger

Risk of death when working on component parts and systems with U >= 25 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

 Danger

Risk of explosion due to escaping combustible gas or overheating of gas cylinders.Risk of injury caused by burns to skin and eyes. Risk of frostbite to body parts caused by escaping gas and by touching components near the valves when emptying gas cylinders. Risk of poisoning or suffocation caused by inhaling gas.

Remove any sources of ignition.
Protective clothing, safety gloves and safety glasses must always be worn.
Ensure that the work area is adequately ventilated.
When working on vehicles at ambient temperatures over 60 °C, all gas cylinders must be removed.

AS00.00-Z-0018-01A

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 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

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-N-5000-01H

Notes on work safety regulations for vehicles with natural gas-powered engines

AH00.10-N-1000-04A

Notes for evaluation of a cylinder barrel

AH01.40-N-0001-03A

Notes on the assessment of pistons and piston rings

AH03.10-N-0001-04A



Remove

1

Start engine and bring to operating temperature, then switch off engine.

 See bodybuilder information. Coolant temperature  80 °C.

2

Remove spark plugs.

AR15.12-G-1010DE

3

Attach turning device to the timing case.

AR03.30-W-1600-03J

 Bolt, turning device to timing case

*BA01.60-N-1003-01I

 Turning device

*904589046300

Illuminate

4

Set piston of cylinder to be checked to bottom dead center using turning device.

 Turning device

*904589046300

5

Connect and switch on endoscope (1). Insert endoscope (1) into cylinder through bore of protective sleeve.


Endoscope (1) must not touch or hit against piston
The lens probe tip will be damaged otherwise.

 See information from body manufacturer.

6

Check condition of cylinder barrel, piston crown, clearance volume, and valves.

If problem is not clear



Remove cylinder head.

AR01.30-G-5800DE

7

Inspect remaining cylinders to be checked with light probe in same manner.

 For 4-cylinder engines the cylinder can be illuminated with two crankcase positions: cylinder 1 and 4 in BDC, cylinder 2 and 3 in BDC.
For engine 6 -cylinder engines the cylinders can be illuminated at three crankshaft positions: Cylinder 1 and 6 at bottom dead center, Cylinder 2 and 5 at bottom dead center Cylinder 3 and 4 at bottom dead center.



Install

8

Remove the cranking device from the timing case.

AR03.30-W-1600-03J

 Inspection hole cap to timing case

*BA01.60-N-1002-01I

 Turning device

*904589046300

9

Install spark plugs.

AR15.12-G-1010DE

 Timing case

Number

Designation

Engine 900.9, 902.9, 904.9, 906.9, 924.9, 925.9, 926.9 in model 000.001

BA01.60-N-1002-01I

Inspection hole cap to timing case

Nm

25

 Timing case

Number

Designation

Engine 900.9, 902.9, 904.9, 906.9, 924.9, 925.9, 926.9 in model 000.001

BA01.60-N-1003-01I

Bolt, turning device to timing case

Nm

25