Mini Cooper Parts Catalog Mini Cooper Accessories Catalog Mini Cooper Technical Articles Mini Cooper Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Water Pump Replacement
 
Bookmark and Share

Pelican Technical Article:

Water Pump Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$70 to $120

Talent:

****

Tools:

13mm wrench, 13mm, 10mm, 8mm socket, extensions, flathead screwdriver, pliers

Applicable Models:

R53 (2002-06)

Parts Required:

Water pump

Hot Tip:

Remove the front clip

Performance Gain:

Proper engine temperature

Complementary Modification:

Coolant flush

In the case of the MINI Cooper S, the water pump is driven off the end of the supercharger. This setup is a bit different than most cars where the water pump is driven off the engine belts. When a water pump begins to fail, you'll notice that the car tends to overheat at low engine speed, such as sitting at a stoplight. When you accelerate, the engine temperature will drop. Now, this is not always indicative of a water pump, but it's a good starting point. You may also want to try squeezing the top radiator hose with the engine warmed up and running. You should feel pressure build up on the back of the hose and surge once it is released. If you feel no pressure, it's a fair bet that the water pump is failing.

You are going to be draining the coolant for this job and unfortunately the radiator does not have a drain plug. You will need to remove the lower radiator hose but it is still possible, if your coolant is good, to catch it in a clean container and reuse it. If you are not reusing the coolant always make sure you catch and dispose of it correctly and in accordance with the regulations in your area; never pour it into the ground, or down a sink or sewer.

Over the years your car may have been serviced by multiple people including previous owners and this can lead to parts replaced with different size fasteners and hardware. 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. If something is different on your vehicle please let us know and share your info to help other users. If you have any questions or comments or even a different procedure you would like to share please leave it below and please leave your vehicle information.

Begin by removing the front clip.
Figure 1

Begin by removing the front clip. Some people claim that you can do this with the front in the service position but do yourself a favor and just remove it completely. It only takes a few more minutes and will save you a lot of time and frustration over trying to work around it, especially if this is your first time. Please see our article on radiator replacement for step by step instructions.

Remove the throttle body; please see our article on throttle body replacement for additional assistance.
Figure 2

Remove the throttle body; please see our article on throttle body replacement for additional assistance.

Use a flathead screwdriver and remove the two hose clamps (yellow arrow).
Figure 3

Use a flathead screwdriver and remove the two hose clamps (yellow arrow). Use a 10mm socket (red arrow) and remove the air supply tube from the supercharger.

There are two plastic hard hoses attached to the tube that you need to remove (red arrows).
Figure 4

There are two plastic hard hoses attached to the tube that you need to remove (red arrows). Press down on the red circle on the base of the tubes and pull them straight out. These tubes along with the mounts get brittle over the years so take care that you do not damage them when removing.

The previous owner of our project car had broken his and tried to fix it (poorly) with JB Weld and RVT.
Figure 5

The previous owner of our project car had broken his and tried to fix it (poorly) with JB Weld and RVT. Make sure to press down on the red circle and do not attempt to pry it upward with a screwdriver.

Use a set of pliers and remove the hose from the front of the water pump (red arrow).
Figure 6

Use a set of pliers and remove the hose from the front of the water pump (red arrow).

Still using the pliers remove the smaller hose on the rear of the pump (yellow arrow) and then use a 13mm socket and or wrench and remove the three bolts (red arrows) holding the supercharger to the water pump.
Figure 7

Still using the pliers remove the smaller hose on the rear of the pump (yellow arrow) and then use a 13mm socket and or wrench and remove the three bolts (red arrows) holding the supercharger to the water pump.

Use a long extension and loosen the two 8mm bolts holding the tube/bracket that the water pump sits in and connects to the block (red arrows) and then pull the pump off the supercharger and block.
Figure 8

Use a long extension and loosen the two 8mm bolts holding the tube/bracket that the water pump sits in and connects to the block (red arrows) and then pull the pump off the supercharger and block. Coolant is going to flow out so be ready to properly catch and dispose of it.

Always replace the O-rings that sit between the block, water pump and tube.
Figure 9

Always replace the O-rings that sit between the block, water pump and tube.

With the pump off, now is a good time to inspect the mounting points on the supercharger (red arrow) and block (yellow arrow) for any dirt, debris or damage.
Figure 10

With the pump off, now is a good time to inspect the mounting points on the supercharger (red arrow) and block (yellow arrow) for any dirt, debris or damage. Installation is the reverse of removal and do not forget to refill your coolant.


Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Fri 12/9/2016 03:06:39 AM