Test compression pressure · ar0100s1200a · Mercedes-Benz WIS

AR01.00-S-1200A

Test compression pressure

15.11.2019

Engine

111 in model 638

1	Compression recorder
E83-E86	Spark plugs

S01.00-3001-06

 	Remove/install
1	Warm up engine to normal operating temperature	 Coolant temperature approx. 80°C
2	Switch off ignition
 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
3	Remove spark plugs (E83-E86)
			AP15.10-D-1580A
4	Connect compression recorder (1)		AR01.10-S-0010-01A
		 Compression tester	*001589762100
	Check
 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
5	Crank engine with contact switch of compression recorder (1)	 Do not crank engine with ignition/starter switch.
		 Crank engine several times to eliminate combustion residues.
6	Insert compression recorder (1) into spark plug bore
7	Completely open throttle valve
8	Crank engine with contact switch of compression recorder (1)	 Do not crank engine with ignition/starter switch.
		 At least 8 revolutions, pressing compression recorder (1) firmly into spark plug bore
9	Check remaining cylinders in the same way
10	Compare measurements obtained with the permissible values	Engine 111.948 in model 638 Engine 111.978 in model 638When new	*BE01.00-N-1001-01A
		Engine 111.948 in model 638 Engine 111.978 in model 638Wear limit (limit value)	*BE01.00-N-1002-01A
		Engine 111.948 in model 638 Engine 111.978 in model 638Permissible difference between individual cylinders	*BE01.00-N-1003-01A
		If necessary, if pressure measured is less than the minimum compression pressure or if the permissible difference between individual cylinders is exceeded
		
		Check for cylinder leakage
			AR01.00-S-1300A
11	Remove compression recorder (1)
12	Install in the reverse order

Check values for compression pressure

Number	Designation		ENGINE 111.948 ε=8.8	ENGINE 111.978 ε=8.8
BE01.00-N-1001-01A	When new	bar	10-12	10-12

Check values for compression pressure

Number	Designation		ENGINE 111.948 ε=8.8	ENGINE 111.978 ε=8.8
BE01.00-N-1002-01A	Wear limit (limit value)	bar	10,5	10,5

Check values for compression pressure

Number	Designation		ENGINE 111.948 ε=8.8	ENGINE 111.978 ε=8.8
BE01.00-N-1003-01A	Permissible difference between individual cylinders	bar	1,5	1,5

001 589 76 21 00

Compression tester

Referenced documents

ap1510d1580a Replace spark plugs
ar0100s1300a Check cylinders for leaks
ar0110s001001a Connecting compression tester
as0000z000501a 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.
as0000z003501a Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)