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    
 >  >
Crankshaft or Engine Speed Sensor Replacement
 
Bookmark and Share

Pelican Technical Article:

Crankshaft or Engine Speed Sensor Replacement

Steve Vernon

Time:

2 hour2 hr

Tab:

$80 to $100

Talent:

****

Tools:

10mm socket, extensions

Applicable Models:

R53 (2002-06)

Parts Required:

Crankshaft or engine speed sensor

Hot Tip:

Use a mirror

Performance Gain:

Smoother running car

Complementary Modification:

Replace Camshaft positioning sensor

Your fuel injection computer (DME) may output a code that indicates a faulty crankshaft position or engine speed sensor. This important sensor tells the car's computer where the flywheel is located in relation to the combustion cycle. The DME takes the signals from both the cam position sensor and crankshaft position sensor, and calculates when to fire the fuel injectors and spark plugs. If the crankshaft position sensor is not operating properly, your car will run very erratically or perhaps not at all.

There are two schools of thought when replacing the crankshaft positioning sensor; the first is that you can easily do it with the front clip in the service position and the second being pull the front clip off so you can access it as it will save you time in the long run. The area around the sensor is known for getting oily which will further frustrate you if you are performing the work with the clip in the service position. You can always try it first and if that does not work then remove the clip. One thing is for certain--it is impossible to get good pictures of the procedures with the clip in place, so I removed it.

Begin by safely raising and supporting the vehicle and removing the under body engine tray. Please see our articles on jacking up and supporting your vehicle as well as removing the under body trays. Whether you are removing the clip or not please see our article on radiator replacement for additional information on how to move the front into service position or remove it.

While it is technically possible to replace the crankshaft positioning sensor located below the throttle body next to the bellhousing (red arrow, not show) from below, it is not possible to get pictures of it.
Figure 1

While it is technically possible to replace the crankshaft positioning sensor located below the throttle body next to the bellhousing (red arrow, not show) from below, it is not possible to get pictures of it.

I removed the front clip to better illustrate the procedures but I recommend you do as well.
Figure 2

I removed the front clip to better illustrate the procedures but I recommend you do as well. It doesn't take that long and makes this a lot easier job. With the front clip and a few other things removed, you can see the crank positioning sensor (red arrow)

Clean the grease and oil off the switch as best you can and then you need to push up the tiny little red tab (red arrow).
Figure 3

Clean the grease and oil off the switch as best you can and then you need to push up the tiny little red tab (red arrow).

With the tab up you can squeeze the rear of the connector (red arrow) and pull it straight back.
Figure 4

With the tab up you can squeeze the rear of the connector (red arrow) and pull it straight back.

Use a 10mm socket and extension and remove the single screw holding the sensor in place.
Figure 5

Use a 10mm socket and extension and remove the single screw holding the sensor in place.

Pull the sensor (red arrow) straight back and out from the opening in the block.
Figure 6

Pull the sensor (red arrow) straight back and out from the opening in the block.

Always give the area around the sensor port (red arrow) a good cleaning--taking care not to get dirt and debris into the crank area.
Figure 7

Always give the area around the sensor port (red arrow) a good cleaning--taking care not to get dirt and debris into the crank area.

If you have removed the sensor for some other reason other than replacing it and are going to reinstall it always make sure to use a new O-ring, these have a tendency to leak and you do not want to go through all of this again to save a few bucks.
Figure 8

If you have removed the sensor for some other reason other than replacing it and are going to reinstall it always make sure to use a new O-ring, these have a tendency to leak and you do not want to go through all of this again to save a few bucks. Installation is the reverse of removal


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: Wed 12/7/2016 03:08:10 AM