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Pelican Technical Article:

Fan and Shroud Removal

Steve Vernon

Time:

30 minutes30 mins

Tab:

$0

Talent:

**

Tools:

10mm wrench, flathead screwdriver

Applicable Models:

Mercedes-Benz W123 (1977-85)

Hot Tip:

Use a flared nut wrench

Performance Gain:

Working fan

Complementary Modification:

Coolant flush

The fan and fan shroud are important parts of your car's cooling system. They help to draw and channel air into the radiator and engine compartment. There are several reasons why you might want to remove the fan and the fan shroud on your Mercedes. Those reasons include replacing the fan, fan clutch and a broken shroud. Additionally, removing the fan and shroud will also give you a lot more room when working on the front of the engine.

While you can remove the fan without removing the shroud, you will need to remove the fan if you want to take the shroud out.

Remember your car may have been serviced before and parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve as they grow older. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The fan on the engine is connected to the water pump pulley.
Figure 1

The fan on the engine is connected to the water pump pulley. The shroud (red arrow) is connected to the radiator. You can remove the fan without the shroud but if you want to remove the shroud the fan must come out first.

The bolts that hold the fan to the water pump pulley tend to get really corroded and stuck in place and you must use a box ended wrench to remove them or run the risk of stripping them.
Figure 2

The bolts that hold the fan to the water pump pulley tend to get really corroded and stuck in place and you must use a box ended wrench to remove them or run the risk of stripping them. Due to clearance issues between the bolts that hold the fan to the water pump pulley and the fan itself most people tend to grind down the outside of a box ended wrench to make clearance for it to fit. A trick is that you can use a 10mm flared nut wrench (usually used for removing brake lines) and this will save you grinding down one of your wrenches and also having to buy a grinder.

Working between the pulley and fan remove three of the 10mm bolts (red arrow) and loosen the fourth.
Figure 3

Working between the pulley and fan remove three of the 10mm bolts (red arrow) and loosen the fourth.

If you work carefully you can slip the fan off the pulley and work it out from the engine without removing the fourth bolt (red arrow).
Figure 4

If you work carefully you can slip the fan off the pulley and work it out from the engine without removing the fourth bolt (red arrow).

You can now remove the fan from the motor.
Figure 5

You can now remove the fan from the motor.

If you want to remove the shroud use a flathead screwdriver and gently pry off the two clips on the top of the shroud that connect it to the radiator (red arrow).
Figure 6

If you want to remove the shroud use a flathead screwdriver and gently pry off the two clips on the top of the shroud that connect it to the radiator (red arrow). Use care not to break the plastic on the shroud or radiator.

If you have loosened the fan you can remove the two pieces together or if you have already removed the fan the shroud will come right out.
Figure 7

If you have loosened the fan you can remove the two pieces together or if you have already removed the fan the shroud will come right out. Installation is the reverse of removal.

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Page last updated: Thu 6/29/2017 03:06:23 AM