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Throttle Body cleaning and replacement
 
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Pelican Technical Article:

Throttle Body cleaning and replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$7 to $300

Talent:

**

Tools:

10mm socket, flathead screwdriver

Applicable Models:

R53 (2002-06)

Parts Required:

Throttle body, O-ring

Hot Tip:

Do NOT strip the bolts

Performance Gain:

Smoother-running engine

Complementary Modification:

New air filter

The throttle body on the Mini R53 is a precision piece of equipment that is subject to a rather harsh environment. Super charged motors can increase the wear on a throttle body from the extra pressure and oil blow by. After years of reliable service, the throttle body may become dirty or clogged, which may result in lowered performance. A simple good cleaning may be all that is needed to restore performance and improve mileage. If you are removing the throttle body to give it a good cleaning you will need to replace the O-ring between the throttle body and the intake manifold.

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 include your vehicle information.

The throttle body can be replaced without lifting the vehicle. Some components may have been moved for photographic purposes only; you only need to perform the work described here.

The throttle body is located on the left side of the motor below the super charger (red arrow).
Figure 1

The throttle body is located on the left side of the motor below the super charger (red arrow). We have moved components out of the picture (i.e.; the cold air intake tube) but you should be able to remove the throttle body by just removing the components in this article.

Begin by using a flathead screwdriver and loosening the two hose clamps (red arrows) that connect the intake tube from the air box to the throttle body and lift the tube out.
Figure 2

Begin by using a flathead screwdriver and loosening the two hose clamps (red arrows) that connect the intake tube from the air box to the throttle body and lift the tube out.

With the intake tube off you can see the butterfly valve on the throttle body (red arrow).
Figure 3

With the intake tube off you can see the butterfly valve on the throttle body (red arrow). This throttle body is in really nice shape, yours may have more oil blow by on it.

Disconnect the wiring harness by squeezing the tab and pulling it straight back off the throttle body (red arrow).
Figure 4

Disconnect the wiring harness by squeezing the tab and pulling it straight back off the throttle body (red arrow).

Use a 10mm socket and extension and remove the four bolts holding the throttle body on (red arrow).
Figure 5

Use a 10mm socket and extension and remove the four bolts holding the throttle body on (red arrow).

There is a small hose connected to the base of the throttle body (red arrow).
Figure 6

There is a small hose connected to the base of the throttle body (red arrow). You will need to remove the clip or clamp to slide the hose off the body; this may be easier to do before removing the throttle body or after depending on the orientation of the clamp.

With the hose disconnected remove the throttle body from the vehicle.
Figure 7

With the hose disconnected remove the throttle body from the vehicle. If you are just removing the throttle body to clean it, always replace the rubber gasket on the bottom of the body (red arrow). Installation is the reverse of removal.

With the throttle body removed it is a good idea to clean up the mounting flange and as much of the intake tube as you can.
Figure 8

With the throttle body removed it is a good idea to clean up the mounting flange and as much of the intake tube as you can. Installation is the reverse of removal.

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