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Camshaft Magnetic Adjuster Replacement
 
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Pelican Technical Article:

Camshaft Magnetic Adjuster Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$35 to $3,200

Talent:

**

Tools:

E8 Torx, T30 Torx, small flathead screwdriver

Applicable Models:

Mercedes-Benz W204 (2008-15)

Parts Required:

Camshaft adjuster magnet

Hot Tip:

Clean the area before removing the magnet

Performance Gain:

Better control of fuel injection and engine timing

Complementary Modification:

Replace crankshaft position sensor

Your fuel injection computer (DME) may output a code that indicates faulty camshaft adjuster magnets. The camshaft adjuster magnets are an essential part of the variable camshaft system on the vehicle. If they are not operating properly, your car can run very rough.

There are four camshaft adjusters on the C350 motor, one for each intake and one for each exhaust cam. The adjusters are located at the front of the motor on the end of each cam housing. Replacement of three of the adjusters is simple but if you need to replace the left side intake adjuster, you will need to remove the oil cooler.

To replace the camshaft adjusters you will need to remove the front engine cover (red arrow) by pulling it straight up from the front.
Figure 1

To replace the camshaft adjusters you will need to remove the front engine cover (red arrow) by pulling it straight up from the front. Remove the two air intake ducts by compressing them in off the air filter cover, then slipping them off the ducts (yellow arrows). Please see our article on engine cover removal for additional assistance.

The four adjusters are located on the end of the cam housings on each head (yellow arrows).
Figure 2

The four adjusters are located on the end of the cam housings on each head (yellow arrows).

On the left side bank you can remove the exhaust cam adjuster without removing any other components but if you are replacing the intake magnet (yellow arrow) you will need to first remove the oil cooler (red arrow).
Figure 3

On the left side bank you can remove the exhaust cam adjuster without removing any other components but if you are replacing the intake magnet (yellow arrow) you will need to first remove the oil cooler (red arrow). Please see our article on oil cooler replacement for additional instruction.

With the oil cooler removed you have easy access to both the intake (red arrow) and exhaust (yellow arrow) camshaft magnetic adjusters.
Figure 4

With the oil cooler removed you have easy access to both the intake (red arrow) and exhaust (yellow arrow) camshaft magnetic adjusters.

The plastic clips can be fragile.
Figure 5

The plastic clips can be fragile. Gently lift up the gray clip (red arrow) with a flathead screwdriver and push back on it to release the connection, and then pull straight up.

Next, use an E8 Torx and remove the three bolts (red arrows).
Figure 6

Next, use an E8 Torx and remove the three bolts (red arrows).

The magnetic adjuster will just pull straight out of the motor.
Figure 7

The magnetic adjuster will just pull straight out of the motor.

If you are removing the adjuster for some other reason than replacement and going to be reinstalling it always make sure that you install a new gasket.
Figure 8

If you are removing the adjuster for some other reason than replacement and going to be reinstalling it always make sure that you install a new gasket.

Always inspect the cam port to make sure there is no dirt, damage or debris that could be affecting the performance of the adjuster.
Figure 9

Always inspect the cam port to make sure there is no dirt, damage or debris that could be affecting the performance of the adjuster. Also make sure the mounting surface is clean and flat before installing the new adjuster.

On the right bank you will need to remove the change over valve from its mount by releasing the clip on the back of it (red arrow) and then removing the three T30 Torx holding the mount in place (yellow arrows).
Figure 10

On the right bank you will need to remove the change over valve from its mount by releasing the clip on the back of it (red arrow) and then removing the three T30 Torx holding the mount in place (yellow arrows). This will give you access to remove the intake magnet. Installation is the reverse of removal

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Page last updated: Fri 12/9/2016 02:54:04 AM