Test compression pressure · ar0100p1200lfd · Mercedes-Benz WIS

AR01.00-P-1200LFD

Test compression pressure

18.04.2017

Engine

642 in model 213, 222, 238, 253

1	Compression recorder
2	Adapter
3	Screw-in piece

P01.00-3302-03

 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
 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
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
 	Remove/install
1	Start engine and warm up to normal operating temperature (approx. 80 °C)	 Check compression pressure for an engine is at operating temperature.
2	Remove glow plugs	Engine 642 in model 213, 238, 253	AR15.20-P-4111OGW
		Engine 642 in model 222	AR15.20-P-4111LFD
3	Start engine over the contact switch of the compression recorder (1) and allow to turn a few times to remove combustion residues in the cylinder	Engine 642 in model 213, 238, 253	AR01.10-P-0110OLC
		Engine 642 in model 222	AR01.10-P-0110LFD
4	Screw screw-in piece (3) with installed check valve in the glow plug hole of the cylinder to be checked air-sealed	 Screw-in fitting	*642589026300
	Check
5	Hermetically connect compression recorder (1) with connecting piece (2) to screw-in fitting (3)	 Screw-in fitting	*642589026300
		 Compression tester	*001589762100
6	Crank engine with contact switch for the compression recorder (1) until a pressure rise is no longer indicated on the compression recorder (1)	Engine 642 in model 213, 238, 253	AR01.10-P-0110OLC
		Engine 642 in model 222	AR01.10-P-0110LFD
7	Carry out testing procedure in the cylinder order on remaining cylinders in the same way
8	Compare pressure readings obtained with test values	Wear limit or limit value of compression pressure	*BE01.00-P-1002-01A
		Compression pressure, permissible difference between the cylinders	*BE01.00-P-1003-01A
		Installation tolerance or new value of compression pressure	*BE01.00-P-1001-01A
		If pressure measured is less than minimum compression pressure or if permissible difference between individual cylinders is exceeded.
		
		Check cylinder leakage.
		Engine 642 in model 213, 238, 253	AR01.00-P-1300OGW
		Engine 642 in model 222	AR01.00-P-1300LFD
9	Install in the reverse order

Compression pressure

Number	Designation		Engine 642.8
BE01.00-P-1001-01A	Installation tolerance or new value of compression pressure	bar	23...30

Compression pressure

Number	Designation		Engine 642.8
BE01.00-P-1002-01A	Wear limit or limit value of compression pressure	bar	17

Compression pressure

Number	Designation		Engine 642.8
BE01.00-P-1003-01A	Compression pressure, permissible difference between the cylinders	bar	3

642 589 02 63 00

Screw-in fitting

001 589 76 21 00

Compression tester

Referenced documents

ah0000p500001a Notes on avoiding damage through contamination and foreign objects
ar0100p1300lfd Check cylinders for leaks
ar0100p1300ogw Check cylinders for leaks
ar0110p0110lfd Crank engine with starter
ar0110p0110olc Crank engine with starter
ar1520p4111lfd Remove/install glow plugs
ar1520p4111ogw Remove/install glow plugs
as0000z000201a Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.
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.