More Cylinder head removal details for Mercedes Benz?

Remove Mercedes cylinder head.How to replace 3.2L Engine,3.7L engine , 4.3L Engine cylinder head.

Drain and recycle the engine coolant.
The fan clutch is equipped with right-hand thread.

Engine cooling fan and clutch
Fan shroud

Place a guard plate behind the radiator/condenser to protect it from damage during removal and installation.

Engine cover
Air cleaner housing, resonance pipe and body

Properly relieve the fuel system pressure.
The intake manifold system must not be disassembled.

Fuel line
Ignition coils
Cylinder head covers

Intake manifold
Vacuum switchover valve
Camshaft Position (CMP) sensor

Lock the automatic belt tensioner by rotating the tensioner counterclockwise until a 5mm drift or pin fits through the tensioner.

Serpentine belt
Power steering pump and position it aside leaving the hoses attached
Heater hose at the firewall
Exhaust system from the exhaust manifolds

Rotate the engine clockwise to position the crankshaft 40 degrees after top dead center.
The engine must not be rotated backwards.

Lock the camshafts using the Camshaft Locking tools 112 589 00 32 00 and 112 589 01 32 00.
See the diagram shown below:---
Exploded view of the cylinder head removal-3.2L engine shown

Remove or disconnect the following:
Generator, then the timing chain tensioner
Camshaft gears and attach them to the chain with a cable tie
Camshaft bearing bridges
Timing case-to-cylinder head bolts

Loosen and remove the cylinder head bolts in stages following the illustrated sequence.

Cylinder head off the engine block
All gasket material from the sealing surfaces of the cylinder head and engine block. Be careful not to gouge or scratch the surface of the aluminum head. Be sure the cylinder head locating dowels are positioned in the engine block. Clean and dry the head bolt holes using compressed air.

Measure the length of the cylinder head bolt shafts, new bolt length is 5.57 inches (141.5mm) and the maximum permissible length is 5.69 inches (144.5mm). Replace bolts that measure greater than the maximum permissible length.


Exploded view of the cylinder head accessory components-3.2L engine shown

For installing follow the procedure and diagrams mentioned below:----

Clean the head bolt threads, then apply clean engine oil to the thread and head contact surfaces.
Install the cylinder head to the engine block and tighten the head bolts according to sequence as follows:
Step 1. 15 ft. lbs. (20 Nm).
Step 2. 37 ft. lbs. (50 Nm).
Step 3. 60-70 degrees.
Step 4. additional 60-70 degrees.


Cylinder head bolt tightening sequence-4.3L Engine

Install or connect the following:
Timing case-to-cylinder head bolts and tighten to 15 ft. lbs. (20 Nm)
Camshaft bearing bridges
Camshaft gear and tighten the mounting bolt to 37 ft. lbs. (50 Nm) plus an additional 90 degrees. Check the basic camshaft position and adjust if necessary.
Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)

Cylinder head bolt tightening sequence-4.3L Engine

Remove the camshaft locking plates.

Exhaust system to the manifolds and tighten the mounting nuts to 15 ft. lbs. (20 Nm)
Heater hose to the cylinder head
Power steering pump
Serpentine belt and remove the locking pin
CMP sensor
Vacuum switchover valve
Intake manifold
Cylinder head covers and tighten the bolts to 88 inch lbs. (10 Nm)
Ignition coils and tighten the mounting bolts to 70 inch lbs. (8 Nm)
Fuel pipe
Air cleaner housing, resonance pipe and body
Engine cover

Remove the guard plate from the radiator/condenser.

Fan shroud, then the cooling fan

Fill the engine with coolant.
Connect the negative battery cable.
Read fault memory, encode the radio and normalize the power windows.
Start the vehicle and check for leaks.

These details will help.


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