Fuel System/Engine - Injection/Induction System Cleaning

Fuel System/Engine - Injection/Induction System Cleaning

SI M13 01 07

Fuel Systems

June 2011

Technical Service

This Service Information bulletin supersedes SI M13 01 07 dated August 2010.

[NEW] designates changes to this revision

SUBJECT

Fuel Injection and Induction System Cleaning

MODEL

R50 (Cooper) vehicles equipped with W10 engine

R52 (Cooper and Cooper S) vehicles equipped with W10 and W11 engines

R53 (Cooper S) vehicles equipped with W11 engine

R55 (Clubman) vehicles equipped with N12 engine

R56 (Cooper) vehicles equipped with N12 engine

R57 (Cooper Convertible) equipped with N12 engine

SITUATION

Deposits found in the injection and induction system may cause the vehicle to experience a variety of drivability complaints, eventually leading to

the Service Engine Soon lamp to be illuminated. Some of the possibilities are listed below.

Fuel Injectors

Deposits at the fuel injector's tip can impact fuel flow, disturbing the air/fuel mixture ratio. Symptoms are the following: Hesitation or stumble during

acceleration, or even loss of power; poor fuel efficiency; increased emissions of HC and CO; and "Service Engine Soon" lamp illumination due to

misfire faults, or lean mixture adaptations.

Intake Valves

Deposits at the valves and on the intake manifold ports can absorb fuel during the warm-up phase, leaning out the air/fuel mixture ratio. Carbon

build-up may disturb the mixture flow at low throttle conditions and/or idle speeds.

Symptoms are the following: Poor drivability; loss of power; unstable and/or rough idle; increased emissions of HC, CO and NOx; and "Service

Engine Soon" lamp illumination due to intermittent misfire faults.

Combustion Chamber

Combustion Chamber Deposit Interference (CCDI) occurs when there is a contact between carbon deposits on the piston crown and the cylinder

head. The noise can be confused or misdiagnosed as a ping, knock, or other noises that could indicate a mechanical failure. CCDI occurs first as a

cold start noise that can fade as the engine warms to operating temperature. The noise will reoccur at the next cold start. As deposits build, there is

an increase in compression temperature that may cause pre-ignition detonations.

Symptoms are the following: Knocking; pinging; run-on; poor acceleration; octane requirement increase; increased emissions of NOx; and engine

idle speed surges.

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Depending on the manufacturer, fuels may contain various additives such as: oxidation and corrosion inhibitors; metal deactivators; emulsifiers; and

anti-icing agents and dyes. In addition, they are required to include some form of an intake system deposit control package. Unfortunately, not all

fuels are created equal, and some additive packages are not effective enough to maintain the integrity of the intake systems in high performance

engines, or engines operating under severe environmental conditions. Even worse, the intake system deposit control additives in some fuels may

actually contribute to the combustion chamber deposits accumulation, and to the problems associated with those deposits, i.e., knock, run-on and

increased emissions of oxides of nitrogen.

To remedy these complaints, the BMW Group has developed a new special tool and cleaner concentrate to clean the fuel and injectors, induction

system and combustion chamber of harmful deposits.

Note:

The fluids and tools described in this Service Information bulletin are the only MINI approved items that can used to clean the fuel injection system,

induction system and combustion chamber. Using non-approved fluids or tools can lead to premature component failure and will not be covered

under Warranty.

Fuel Injector and Induction System Cleaner Concentrate

This item will be shipped via the automatic Tool Shipment Program. Refer to SI M04 07 07 for complete details.

Fuel Injector and Induction System Cleaner Applicator

Kit P/N 82 14 0 429 692

1. Chain with hook

2. Shop air connection

3. Regulator

4. Cylinder

5. Gauge

6. Pressure relief button

7. Quick connect

8. Pressure relief hose with rubber plug

Pressure Relief Button, Shutoff Valve and 40 Micron filter location

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1. Shutoff valve

2. Pressure relief button, replaceable if found restricted, P/N 83 30 0 440 139

3. 40 Micron Filter, replaceable if found restricted, P/N 82 14 0 429 702

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Kit Overview

Refer to the attached procedures described below by model. It is recommended that two applications be made consecutively on each vehicle. Every

vehicle will require 1 liter of fuel to perform the cleaning procedure. If more applications are required, please contact your Regional Technical

Engineer via PuMA.

Procedure A - All vehicles equipped with the W10 engine

Procedure B - All vehicles equipped with the W11 engine

Procedure C - All vehicles equipped with the N12 engine

IMPORTANT:

Before starting the cleaning procedure, place the vehicle in a well-ventilated area. If the cleaning procedure occurs indoors, be sure to have the

vehicle connected to an exhaust removal system. It is necessary to wear Nitrile rubber gloves and safety glasses during this procedure.

The shop air supply should be dried using a general purpose filtering system; the tool is not recommended for use with a lubricating system.

[NEW] FINAL PROCEDURE FOR RELEASING THE VEHICLE TO THE CUSTOMER

Advise the customer that it is necessary to add one bottle of MINI CRUD-B-GONE Fuel System Cleaner Plus, P/N 82 14 2 186 158, with either

TOP TIER Detergent Gasoline or Premium Fuel with a minimum octane rating of AKI 91, the next time that the vehicle is refueled.

For optimum cleaning, advise the customer to add one bottle every 3,000 miles when refueling. Refer to SI M13 05 06, MINI CRUD-B-GONE Fuel

System Cleaner Plus.

More information regarding fuel systems and fuel additives can be found in the following Service Information bulletins:

^ SI M13 01 06 Alcohol Fuel Blends in MINI Vehicles

^ SI M13 02 06 TOP TIER Detergent Gasoline in MINI Vehicles

^ SI M13 05 10 Fuel Composition Tester

2002-2006 Mini Cooper (R50) L4-1.6L (W10) Page 39

^ SI M13 05 06 MINI CRUD-B-GONE Fuel System Cleaner Plus

PARTS INFORMATION

WARRANTY INFORMATION

Procedure A - With The W10 Engine

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Procedure B - With the W11 Engine

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Procedure C - With the N12 Engine

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