Mercedes-Benz ML320. Service manual - part 404

 

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Mercedes-Benz ML320. Service manual - part 404

 

 

Fig. 5: Identifying Timing, Markings - Shown On Engine 112 

Engine timing  

The basic setting is 40° after TDC. 

At 40° after TDC the grooves (6) in the left and right camshafts point in the direction of the inner V and are 
centered on the parting surface of the cylinder head cover. The copper-plated lugs (1) and marks on the 
camshaft sprockets (4 and 5) coincide. 

The groove in the crankshaft (2) and the mark on the balance shaft sprocket (3) point toward one anther and 
both coincide with the copper-plated lugs (1). 

Rubber-coated sprockets  

In order to improve the noise characteristic of the timing case drive the chain sprockets on the crankshaft, 
balance shaft and camshafts are rubber-coated. 

Only on engine 112  

6 mm dia. locating holes (a) are located coinciding with one anther in the rear balancing weight on the balance 
shaft and rear of the crankcase. 

Repair note  

Due to the difference in the timing chain paths it may be necessary to crank the engine up to 14 times before the 

 

2004 Mercedes-Benz ML350 

1998-2005 ENGINE Engine timing - 163 Chassis

  

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marks on the camshafts coincide again. 

Fig. 6: Identifying Holes - Only On Engine 112 

Only on engine 112  

Checking the balance shaft with engine assembled  

Two marks, one at the front of the crankcase and the other on the end of the balancing weight, point toward one 
anther and can be seen through the left timing case shaft approx. 22 cm. below the parting surface of the 
cylinder head cover when the cylinder head cover is removed. 

Fig. 7: Identifying Two Marks On Front Of Crankcase 

SAFETY PRECAUTIONS 

SAFETY INFORMATION: ENGINE TIMING - AS05.00-Z-9999ZZ 

MODEL all  

 

2004 Mercedes-Benz ML350 

1998-2005 ENGINE Engine timing - 163 Chassis

  

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RISK OF EXPLOSION AND POISONING - AS05.30-Z-0001-01A 

Do not open sodium-filled valves. Wear protective gloves and safety glasses when handling damaged 
valves.
  

Exhaust valves filled with sodium  

Potential risks  

Risk of explosion  

Explosion may occur when melting down sodium-filled valves. Sodium has a very low self-ignition temperature 
(121 °C) and may spontaneously ignite in moist air. 

Improper disposal may lead to fires due to moisture in scrap containers. 

Risk of poisoning  

The inhalation of toxic vapors causes severe irritation, shortness of breath, headaches, nausea and vomiting. 

Risk of injury  

Leaked sodium that comes into contact with moist body tissue (perspiration on hands, tears) may undergo a 
severe, explosive reaction and generate heat. This may lead to skin irritation and burns, and to corneal damage 
with possible blinding. 

Safety instructions/precautions  

Keep water and sources of heat and ignition away from sodium.  

When handling damaged, sodium-filled valves, wear suitable protective gloves and safety glasses, if 
necessary.  

Never machine sodium-filled valves.  

Do not open sodium-filled valves.  

Observe all additional safety requirements and regulations in your country.  

First aid measures  

Skin and eye contact 

Remove sodium, treat the injured area with an oily solution, e.g. Biseptol and consult a physician. 

 

Risk of explosion and poisoning caused by the melting down 
or improper handling of sodium-filled valves. Risk of injury 
caused by skin contact with sodium resulting in heat or 
chemical burns.

ENGINE 111, 112, 113, 
137, 155, 156, 166, 266, 
646, 647, 648 ...

AS05.30-Z-
0001-01A

 

2004 Mercedes-Benz ML350 

1998-2005 ENGINE Engine timing - 163 Chassis

  

me 

 

Ingestion 

Do not give the affected person anything to drink, consult a physician.  

Vapor inhalation 

Move the victim out of the risk area.  

If victim has the urge to vomit, give him/her oxygen.  

In the event of respiratory failure, administer artificial respiration and notify a physician.  

TESTING & REPAIR 

REMOVE/INSTALL HYDRAULIC VALVE CLEARANCE COMPENSATION ELEMENTS - AR05.00-P-2011B 

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

ENGINE 112 in MODEL 129, 163, 170, 202, 203, 208, 209, 210, 220  

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

ENGINE 113 in MODEL 129, 163, 202, 203, 208, 209, 210, 215, 220, 230.474 /475  

ENGINE 112.913 in MODEL 211.061/261  

ENGINE 112.949 in MODEL 211.065/265  

ENGINE 113.967 in MODEL 211.070/270  

ENGINE 113.982 in MODEL 463.243/246  

ENGINE 113.990 in MODEL 211.076/276

 

2004 Mercedes-Benz ML350 

1998-2005 ENGINE Engine timing - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

Content   ..  402  403  404  405   ..