Mercedes-Benz ML320. Service manual - part 441

 

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Mercedes-Benz ML320. Service manual - part 441

 

 

Fig. 29: Identifying Firing Order (Engines 137,275,285) 

INSPECT CYLINDERS FOR LEAKS - AR01.00-P-1300HV 

ENGINE 112,137,285  

ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250  

ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254  

ENGINE 113.982 in MODEL 463.243/246  

ENGINE 113 (except 113.995) in MODEL 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230  

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Complete engine - 163 Chassis

  

me 

 

Fig. 30: Identifying Components For Inspecting Cylinders For Leaks

Shown on Engine 112  

 

 

Remove, Install

 

 

  

1

Risk of accident from 
vehicle starting off by 
itself when engine 
running. Risk of injury 
suffered in the form of 
bruises or burns to the 
hands when reaching in 
while the engine cranks 
or runs 
Bring engine to operating 
temperature (approx. 80 °
C)

Secure vehicle to prevent it 
from moving off by itself. 
Wear closed and close-
fitting work clothes. 
Do not grasp hot or rotating 
parts. 

 Check the cylinder for 

leaks only when the engine 
is at normal operating 
temperature.

AS00.00-Z-0005-01A 

  

 

Risk of injury to skin 
and eyes suffering 
scalding from contact 
with hot coolant spray. 
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 
bottles. 
Wear protective gloves, 
protective clothing and eye 
protection. 
 

AS20.00-Z-0001-01A 

2

Open cap (2) of 
expansion reservoir

In Model 463 with Engine 
112, 113, a cap (2) with a 
detent is built-in 

  

Turn cap carefully up to the 
first pre-detent, relieve the 
pressure and then unscrew 
the cap (2). 

 A 1-stage cap is fitted to 

Model 163 with Engine 
112, 113. 

 Turn the 1-stage and 2-

stage cap half a revolution 
counterclockwise, relieve 
the pressure, then unscrew 
the 1-stage or 2-stage cover.

3

Remove a spark plug 
(19) from each cylinder

 

 

 

Model 202, 208, 209, 210 
with Engine 112, 113.

AP15.10-P-1580A

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Complete engine - 163 Chassis

  

me 

 

 

Model 203, 170 with 
Engine 112.

 

 

Model 163 with Engine 
112, 113.

AP15.10-P-1580GH 

 

Model 215, 220 with 
Engine 137.

AP15.10-P-1580L

 

Model 230.474/475, 211, 
220 with Engine 112, 113

AP15.10-P-1580AB

 

Model 240 with Engine 
285.

AP15.10-P-1580H

 

Model 463 with Engine 
112,113

AP15.10-P-1580GA

4

Position piston of 
cylinder to be tested to 
ignition TDC

 Crank the engine at the 

center bolt of the crankshaft 
in the direction of rotation 
of engine.

 

5

Connect cylinder leak 
tester (04)

 Calibrate cylinder 

leakage tester (04) and 
screw the connection hose 
into the spark plug bore 

 Cylinder leak tester

*WH58.30-Z-1015-05A

6

Remove the oil filler cap 
(3)

 

 

 

Inspection 

 

 

7

Apply compressed air to 
the cylinder, read off 
pressure loss on the 
cylinder leakage tester 
(04) and determine the 
cause if there is an 
increased pressure loss

Cylinder leaktightness 
permissible loss total 
indication

*BE01.00-P-1001-02Z

Cylinder leaktightness 
permissible losses at valves 
and cylinder head gasket

*BE01.00-P-1002-02Z

Cylinder leaktightness 
permissible losses at pistons 
and piston rings

*BE01.00-P-1003-02Z

If the crankshaft rotates: ?

 

Engine 112, 113, 137. 
Install retaining lock for 
crankshaft

AR03.30-P-5000B 

Engine 285. 
Lock crankshaft with 
counterholder. 

 Retainer

Fig. 31

8

Conduct the test of the 
other cylinders in the 
firing order of the engine

 

AR01.00-P-1300-03HA

9

Install in the reverse 

 

 

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Complete engine - 163 Chassis

  

me 

 

Cylinder leakage 

Fig. 31: Identifying Counterholder (112 589 00 40 00) 

Commercially available tools 

DISCONNECTING AND CONNECTING ENGINE WIRING HARNESS - AR01.00-P-2410V 

ENGINE 112.942 in MODEL 163.154  

ENGINE 112.970 in MODEL 163.157  

ENGINE 113.942 in MODEL 163.172  

ENGINE 113.981 in MODEL 163.174  

ENGINE 113.965 in MODEL 163.175  

Shown on Model 163.154  

order

Number

Designation

All Engines

BE01.00-P-1001-02Z

Cylinder leakage 
permissible loss total 
indication

% < or = 25

BE01.00-P-1002-02Z

Cylinder leakage 
permissible losses at valves 
and cylinder head gasket

% < or = 10

BE01.00-P-1003-02Z

Cylinder leakage 
permissible losses at 
pistons and piston rings

% < or = 20

Number

Designation

WH58.30-Z-1015-05A

Cylinder leakage testing unit

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Complete engine - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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