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Pelican Technical Article:

Replacing the Engine Shock Absorbers

Mike Holloway

Tools:

10mm socket, 10mm wrench, vise grip pliers, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

Mercedes-Benz R107 (1975-86)

Parts Required:

Engine shock absorbers Pelican Part #116-240-05-48-MBZ (OEM) or 116-240-05-48-M36, Shock Mount Kit Pelican part #123-240-01-17-MBZ (OEM) or 123-240-01-17-M90

Hot Tip:

Remove coolant reservoir

Performance Gain:

Better handing, less vibration, smoother ride, and increased tire life

Complementary Modification:

Replace engine mounts

Your engine produces vibration that can have an effect on the ride and comfort as well as influencing the longevity of components within the engine. The engine shock absorbers will dampen the vibration that occurs but they can wear out over time. Replacing them is a straightforward job.

Before you begin, place a hydraulic jack under the oil pan and lift just until you feel strong resistance. Slide a jack stand under the oil pan. This will lift the engine slightly and relieve the pressure on the shock absorbers.

Before you do any work on your car it is important that you wear safety glasses and work gloves. If you have to jack up your car, make sure to use jack stands and chock your wheels as well as applying the parking brake. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. Never work on your vehicle if you feel the task is beyond your ability. Always disconnect the battery before working on your car.

The engine's shock absorbers are located on either side of the engine bay.
Figure 1

The engine's shock absorbers are located on either side of the engine bay. The passenger side engine shock absorber is located under the coolant reservoir. While it is not essential that the reservoir be removed, removing it provides more space. The driver side engine shock absorber is easier to get at.

Using a 10mm wrench, begin to loosen the nut located at the bottom of the shock absorber.
Figure 2

Using a 10mm wrench, begin to loosen the nut located at the bottom of the shock absorber. You will notice that the nut will not release from the threads unless the shaft is held in place.

Apply a pair of vise grip pliers to the shaft in order to hold it in place.
Figure 3

Apply a pair of vise grip pliers to the shaft in order to hold it in place.

Once the bottom nut has been removed, using a 10mm socket loosen the top nut while holding the shaft of the shock absorber.
Figure 4

Once the bottom nut has been removed, using a 10mm socket loosen the top nut while holding the shaft of the shock absorber.

Take of the fittings from the top of the shock absorber.
Figure 5

Take of the fittings from the top of the shock absorber. These shall be replaced as well.

Using a 20mm socket, loosen and remove the engine mount bolt from the frame.
Figure 6

Using a 20mm socket, loosen and remove the engine mount bolt from the frame. This will allow for the shock absorber to be released. 

The engine shock absorber is now free and can be replaced.
Figure 7

The engine shock absorber is now free and can be replaced. 

Installation is the reversal of removal.


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Page last updated: Fri 12/9/2016 02:54:35 AM