Inspect cylinders with a light probe

AR01.00-P-0200XGA

Inspect cylinders with a light probe

08.08.2019

Engine

176 in model 463

as of model year 2019

Engine

177 in model 463

as of model year 2019

Modification notes

05.08.2019

Information document AH05.30-P-1000-02SZ, added.

Operation step 6.

1

Endoscope with test probe

 

Remove/install

1

Remove spark plug of the cylinder to be checked.



AP15.10-P-1580C

2

Remove front lower engine compartment lining.

AR61.20-P-1105XG

3.1

Remove low-temperature circuit switchover valve mounting support.

Engine 176 in model 463
as of model year 2019

AR09.41-P-1220-01XGA

 Bolt, mounting rail in lower engine compartment lining (front) to frame

*BA61.20-P-1002-01A

3.2

Remove low-temperature circuit switchover valve mounting support.

Engine 177 in model 463
as of model year 2019

AR09.41-P-1240XGC

4

Turn engine at center bolt of the crankshaft in the direction of engine rotation until the piston of the cylinder to be checked is at bottom dead center (BDC).

 Engine 177 in model 463
as of model year 2019
Ring wrench

*177589000300

 Engine 176 in model 463
as of model year 2019
Socket wrench bit

*001589650900

5

Connect endoscope with test probe (1) and insert test probe through the spark plug threaded bore in the cylinder to be checked.



000 588 01 21 00 Endoscope

WS01.00-P-0097B



Check

6

Check cylinder barrels, piston crowns, and valves.

General information on checking valves, valve seats and valve guides

AH05.30-P-1000-02SZ

General information on inspecting cylinder walls

AH01.00-P-0300-01AMG

Notes on the assessment of pistons and piston rings

AH03.10-P-0001-04MM

If the condition of the cylinder barrels is not clearly recognizable,



Remove the relevant cylinder head.

Left cylinder head
Engine 177 in model 463
as of model year 2019

AR01.30-P-5770XGC

Right cylinder head
Engine 177 in model 463
as of model year 2019

AR01.30-P-5780XGC

Left cylinder head
Engine 176 in model 463
as of model year 2019

AR01.30-P-5770XGA

Right cylinder head
Engine 176 in model 463
as of model year 2019

AR01.30-P-5780XGA

7

Install in the reverse order.

 Lower engine compartment paneling

Number

Designation

Model 463
as of model year 2019

BA61.20-P-1002-01A

Bolt, mounting rail in lower engine compartment lining (front) to frame

M8

Nm

20