Camshaft, Bearings & Lifters inspecting and replacing for Mercedes Benz?

The procedure mentioned will work for all types of Mercedes Benz Truck models.

Camshaft, Bearings & Lifters replacing procedure is as follows:----

Inspection

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove the camshaft from the engine.
3. Check the camshaft bearing journals for damage and binding.
4. If the journals are binding, check the cylinder head for damage.
5. Check the cylinder head for clogged oil holes.
6. Check the camshaft surface for abnormal wear and damage. Replace the camshaft, as required.
7. Measure the camshaft lobe surface and replace the camshaft if not within specification.
8. Measure the camshaft journal diameter and replace the camshaft if not within specification.
9. Measure the camshaft run out and replace the camshaft if not within specification.

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove or disconnect the following:
   
   
   Negative battery cable

   Cylinder head cover
3. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).

WARNING

The engine must not be rotated backward.

Generator

Timing chain tensioner

1. Cable tie the timing chain to the camshaft sprocket.
   
   
   Camshaft Position (CMP) sensor
2. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00.
   
   
   Camshaft gears

   Camshaft bearing bridge

   Camshaft from the cylinder head

Fig. Exploded view of the camshaft removal and related components-3.2L and 3.L engine shown; 4.3L and 5.0L engine similar

To install:

NOTE

Be sure to install the correct camshaft for the corresponding cylinder head.

1. Apply clean engine oil to the camshaft contact surfaces.
2. Install or connect the following:
   
   
   Camshaft

   Camshaft bearing bridge

NOTE

The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.

1. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.
   
   
   Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
2. Remove the camshaft locking tools and the cable ties from the timing chain.
   
   
   CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)

   Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)

   Cylinder head cover

   Negative battery cable
3. Read fault memory, encode the radio and normalize the power windows.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove or disconnect the following:
   
   
   Negative battery cable

   Cylinder head cover
3. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).
   
   WARNING

   The engine must not be rotated backwards.
   
   
   
   
   Generator

   Timing chain tensioner
4. Cable tie the timing chain to the camshaft sprocket.
   
   
   Camshaft Position (CMP) sensor
5. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00. 
   
   
   Camshaft gears

   Camshaft bearing bridge

   Camshaft from the cylinder head 
   
   
   

   Fig. Exploded view of the camshaft removal and related components-3.2L engine shown

To install:

NOTE

Be sure to install the correct camshaft for the corresponding cylinder head.

1. Apply clean engine oil to the camshaft contact surfaces.
2. Install or connect the following: 
   
   NOTE

   The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.
   
   
   
   
   Camshaft

   Camshaft bearing bridge
   
   
   
   
   
   Fig. Be sure the camshafts are at their basic positions before installing the cam sprockets-3.2L engine shown
3. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.
   
   
   Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
4. Remove the camshaft locking tools and the cable ties from the timing chain.
   
   
   CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)

   Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)

   Cylinder head cover

   Negative battery cable
5. Read fault memory, encode the radio and normalize the power windows.

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove or disconnect the following:
   
   
   Negative battery cable

   Cylinder head cover
3. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).
   
   WARNING

   The engine must not be rotated backward.
   
   
   
   
   Generator

   Timing chain tensioner
4. Cable tie the timing chain to the camshaft sprocket.
   
   
   Camshaft Position (CMP) sensor
5. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00. 
   
   
   Camshaft gears

   Camshaft bearing bridge

   Camshaft from the cylinder head 
   
   
   

   Fig. Exploded view of the camshaft removal and related components-M112 engine shown; M113 engine similar

To install:

NOTE

Be sure to install the correct camshaft for the corresponding cylinder head.

1. Apply clean engine oil to the camshaft contact surfaces.
2. Install or connect the following:
   
   NOTE

   The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.
   
   
   
   
   Camshaft

   Camshaft bearing bridge
3. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.
   
   
   Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
4. Remove the camshaft locking tools and the cable ties from the timing chain.
   
   
   CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)

   Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)

   Cylinder head cover

   Negative battery cable
5. Read fault memory, encode the radio and normalize the power windows.

These details will help.

Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html