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Genuine BMW Timing Chain

Engine Timing Chain
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74 Timing Chains found

  • Diagram for BMW Timing Chain - 11318648732
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    BMW Timing Chain

    Part Number: 11318648732
    $83.32 MSRP: $128.80
    You Save: $45.48 (36%)
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    Product Specifications
    • Replaces: 11-31-7-516-074, 11-31-7-584-084
    Fits the following BMW Models:
    • 128i | 2008-2013 | Convertible N51 Engine(E88), Convertible N52 Engine(E88), Coupe N51 Engine(E82), Coupe N52 Engine(E82)
    • 135i | 2010-2013 | Convertible N55 Engine(E88), Convertible(E88), Coupe N55 Engine(E82), Coupe(E82)
    • 228i | 2014-2016 | Convertible N20 Engine(F23), Convertible N26 Engine(F23), Coupe N20 Engine(F22), Coupe N26 Engine(F22), N20 Engine(F22), N26 Engine(F22)
    • 228i xDrive | 2015-2016 | Convertible N20 Engine(F23), Convertible N26 Engine(F23), Coupe N20 Engine(F22), Coupe N26 Engine(F22)
    • 320i | 2013-2018 | Sedan(F30)
    • 320i xDrive | 2013-2018 | Sedan(F30)
    • 323i | 2006-2011 | Sedan(E90)
    • 325i | 2006 | Sedan(E90)
    • 325xi | 2006 | Sedan(E90), Wagon(E91)
    • 328i | 2007-2016 | Convertible N51 Engine(E93), Convertible N52 Engine(E93), Coupe N51 Engine(E92), Coupe N52 Engine(E92), N20 Engine(F30), N26 Engine(F30), Sedan N20 Engine(F30), Sedan N26 Engine(F30), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91), Wagon(F31)
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  • Diagram for BMW Timing Chain - 11318570649
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    BMW Timing Chain

    Part Number: 11318570649
    $67.89 MSRP: $104.94
    You Save: $37.05 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-31-8-572-503
    Fits the following BMW Models:
    • 328d | 2014-2018 | Sedan(F30)
    • 328d xDrive | 2014-2018 | Sedan(F30), Wagon(F31)
    • 535d | 2014-2016 | Sedan(F10)
    • 535d xDrive | 2014-2016 | Sedan(F10)
    • 540d xDrive | 2018 | Sedan(G30)
    • 740Ld xDrive | 2015 | Sedan(F02)
    • X3 | 2015-2017 | xDrive28d(F25)
    • X5 | 2014-2018 | xDrive35d(F15)
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  • Diagram for BMW Timing Chain - 11318506869
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    BMW Timing Chain

    Part Number: 11318506869
    $56.48 MSRP: $85.87
    You Save: $29.39 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-31-2-249-851
    Fits the following BMW Models:
    • 335d | 2009-2011 | Sedan(E90)
    • X5 | 2009-2013 | xDrive35d(E70)
  • Diagram for BMW Timing Chain - 11417797896
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    BMW Oil Pump Chain

    Part Number: 11417797896
    $37.98 MSRP: $57.74
    You Save: $19.76 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Chain
    • Replaced by: 11318506656
    Fits the following BMW Models:
    • 328d | 2014-2018 | Sedan(F30)
    • 328d xDrive | 2014-2018 | Sedan(F30), Wagon(F31)
    • 535d | 2014-2016 | Sedan(F10)
    • 535d xDrive | 2014-2016 | Sedan(F10)
    • 540d xDrive | 2018 | Sedan(G30)
    • 740Ld xDrive | 2015 | Sedan(F02)
    • X3 | 2015-2017 | xDrive28d(F25)
    • X5 | 2014-2018 | xDrive35d(F15)
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  • Diagram for BMW Timing Chain - 11318648729
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    BMW Timing Chain

    Part Number: 11318648729
    $84.85 MSRP: $131.17
    You Save: $46.32 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-31-7-617-488
    Fits the following BMW Models:
    • 230i | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 230i xDrive | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 330e | 2016-2018 | Sedan(F30)
    • 330i | 2017-2018 | Sedan(F30)
    • 330i GT xDrive | 2017-2019 | F34
    • 330i xDrive | 2017-2019 | Sedan(F30), Wagon(F31)
    • 340i | 2016-2018 | Sedan(F30)
    • 340i GT xDrive | 2017-2019 | F34
    • 340i xDrive | 2016-2018 | Sedan(F30)
    • 430i | 2017-2020 | Convertible(F33), Coupe(F32)
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  • Diagram for BMW Timing Chain - 11311432177
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    BMW Upper Engine Timing Chain

    Part Number: 11311432177
    $37.97 MSRP: $57.72
    You Save: $19.75 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Timing Chain; Camshaft Chain
    • Position: Upper
    • Replaces: 11-31-1-730-188
    Fits the following BMW Models:
    • 320i | 2001-2005, 1993-1995 | Sedan(E36), Sedan(E46)
    • 323Ci | 2000 | Convertible(E46), Coupe(E46)
    • 323i | 1998-2000 | Convertible(E36), Sedan(E46), Wagon(E46)
    • 323is | 1998-1999 | Coupe(E36)
    • 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe M56 Engine(E46), Coupe(E46)
    • 325i | 2001-2005, 1992-1995 | Convertible(E36), Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E36), Sedan(E46), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
    • 325is | 1991-1995 | Coupe(E36)
    • 325xi | 2001-2005 | Sedan(E46), Wagon(E46)
    • 328Ci | 2000 | Coupe(E46)
    • 328i | 1996-2000 | Convertible(E36), Sedan(E36), Sedan(E46)
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  • Diagram for BMW Timing Chain - 11311432176
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    BMW Engine Timing Chain

    Part Number: 11311432176
    $65.16 MSRP: $99.07
    You Save: $33.91 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Timing Chain; Secondary Chain
    • Replaces: 11-31-1-730-189
    Fits the following BMW Models:
    • 320i | 2001-2005, 1993-1995 | Sedan(E36), Sedan(E46)
    • 323Ci | 2000 | Convertible(E46), Coupe(E46)
    • 323i | 1998-2000 | Convertible(E36), Sedan(E46), Wagon(E46)
    • 323is | 1998-1999 | Coupe(E36)
    • 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe M56 Engine(E46), Coupe(E46)
    • 325i | 2001-2005, 1992-1995 | Convertible(E36), Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E36), Sedan(E46), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
    • 325is | 1991-1995 | Coupe(E36)
    • 325xi | 2001-2005 | Sedan(E46), Wagon(E46)
    • 328Ci | 2000 | Coupe(E46)
    • 328i | 1996-2000 | Convertible(E36), Sedan(E36), Sedan(E46)
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  • Diagram for BMW Timing Chain - 11417576915
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    BMW Chain

    Part Number: 11417576915
    $29.28 MSRP: $30.82
    You Save: $1.54 (5%)
    Ships in 1-3 Business Days
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    Fits the following BMW Models:
    • 320i | 2001-2005, 1993-1995 | Sedan(E36), Sedan(E46)
    • 323Ci | 2000 | Convertible(E46), Coupe(E46)
    • 323i | 1998-2000 | Convertible(E36), Sedan(E46), Wagon(E46)
    • 323is | 1998-1999 | Coupe(E36)
    • 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe M56 Engine(E46), Coupe(E46)
    • 325i | 2001-2005, 1992-1995 | Convertible(E36), Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E36), Sedan(E46), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
    • 325is | 1991-1995 | Coupe(E36)
    • 325xi | 2001-2005 | Sedan(E46), Wagon(E46)
    • 328Ci | 2000 | Coupe(E46)
    • 328i | 1996-2000 | Convertible(E36), Sedan(E36), Sedan(E46)
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  • Diagram for BMW Timing Chain - 13528506969
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    BMW Timing Chain

    Part Number: 13528506969
    $42.35 MSRP: $64.39
    You Save: $22.04 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 13-52-7-789-690
    Fits the following BMW Models:
    • 335d | 2009-2011 | Sedan(E90)
    • X5 | 2009-2013 | xDrive35d(E70)
  • Diagram for BMW Timing Chain - 13528648731
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    BMW Chain

    Part Number: 13528648731
    $67.89 MSRP: $104.94
    You Save: $37.05 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Timing Chain
    • Replaces: 13-52-7-636-184
    Fits the following BMW Models:
    • 230i | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 230i xDrive | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 330e | 2016-2018 | Sedan(F30)
    • 330i | 2017-2018 | Sedan(F30)
    • 330i GT xDrive | 2017-2019 | F34
    • 330i xDrive | 2017-2019 | Sedan(F30), Wagon(F31)
    • 340i | 2016-2018 | Sedan(F30)
    • 340i GT xDrive | 2017-2019 | F34
    • 340i xDrive | 2016-2018 | Sedan(F30)
    • 430i | 2017-2020 | Convertible(F33), Coupe(F32)
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  • Diagram for BMW Timing Chain - 11417572531
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    BMW Oil Pump Drive Chain

    Part Number: 11417572531
    $62.74 MSRP: $95.39
    You Save: $32.65 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Chain
    • Replaced by: 11415A19C97
    Fits the following BMW Models:
    • 550i | 2010-2016 | Sedan(F10)
    • 550i GT | 2010-2015 | F07
    • 550i GT xDrive | 2010-2017 | F07
    • 550i xDrive | 2011-2016 | Sedan(F10)
    • 650i | 2012-2018 | Convertible(F12), Coupe(F13)
    • 650i Gran Coupe | 2013-2019 | F06
    • 650i xDrive | 2012-2018 | Convertible(F12), Coupe(F13)
    • 650i xDrive Gran Coupe | 2013-2019 | F06
    • 750Li | 2009-2015 | ActiveHybrid(F04), Base(F02), Sedan(F02)
    • 750Li xDrive | 2010-2015 | Sedan(F02)
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  • Diagram for BMW Timing Chain - 11417584079
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    BMW Chain

    Part Number: 11417584079
    $77.15 MSRP: $119.26
    You Save: $42.11 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Chain Guide, Timing Chain
    • Replaces: 11-41-7-516-132
    Fits the following BMW Models:
    • 1 Series M | 2011 | Coupe(E82)
    • 128i | 2008-2013 | Convertible N51 Engine(E88), Convertible N52 Engine(E88), Coupe N51 Engine(E82), Coupe N52 Engine(E82)
    • 135i | 2008-2013 | Convertible N54 Engine(E88), Convertible N55 Engine(E88), Convertible(E88), Coupe N54 Engine(E82), Coupe N55 Engine(E82), Coupe(E82)
    • 323i | 2006-2011 | Sedan(E90)
    • 325i | 2006 | Sedan(E90)
    • 325xi | 2006 | Sedan(E90), Wagon(E91)
    • 328i | 2007-2013 | Convertible N51 Engine(E93), Convertible N52 Engine(E93), Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
    • 328i xDrive | 2009-2013 | Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
    • 328xi | 2007-2008 | Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
    • 330i | 2006 | Sedan(E90)
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  • BMW Timing Chain - 11317598263
    Diagram for BMW Timing Chain - 11317598263
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    BMW Timing Chain

    Part Number: 11317598263
    $95.73 MSRP: $102.45
    You Save: $6.72 (7%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-31-1-736-020
    Fits the following BMW Models:
    • 530i | 1994-1995 | Sedan(E34), Wagon(E34)
    • 540i | 1994-1995 | Sedan(E34)
    • 740i | 1993-1995 | Sedan(E32), Sedan(E38)
    • 740iL | 1993-1995 | Sedan(E32), Sedan(E38)
    • 840Ci | 1994-1995 | Coupe(E31)
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  • BMW Timing Chain - 11311403081
    Diagram for BMW Timing Chain - 11311403081
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    BMW Timing Chain

    Part Number: 11311403081
    $95.73 MSRP: $102.45
    You Save: $6.72 (7%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-31-1-309-003, 11-31-1-317-667
    Fits the following BMW Models:
    • M3 | 1988-1991 | Coupe(E30)
    • M5 | 1991-1993, 1988 | Sedan(E28), Sedan(E34)
    • M6 | 1987-1988 | Coupe(E24)
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  • BMW Timing Chain - 11318631842
    Diagram for BMW Timing Chain - 11318631842
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    BMW Timing Chain

    Part Number: 11318631842
    $91.65 MSRP: $141.67
    You Save: $50.02 (36%)
    Ships in 1-3 Business Days
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    Fits the following BMW Models:
    • 228i Gran Coupe | 2021-2024 | 4 Cyl 2.0 L GAS
    • 228i xDrive Gran Coupe | 2020-2024 | 4 Cyl 2.0 L GAS, F44
    • 230i | 2023 | 4 Cyl 2.0 L GAS
    • 230i xDrive | 2023 | 4 Cyl 2.0 L GAS
    • 330e | 2021-2024 | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
    • 330e xDrive | 2021-2024 | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
    • 330i | 2019-2024 | 4 Cyl 2.0 L GAS, Sedan(G20)
    • 330i xDrive | 2019-2024 | 4 Cyl 2.0 L GAS, Sedan(G20)
    • 430i | 2021-2024 | 4 Cyl 2.0 L GAS
    • 430i Gran Coupe | 2022-2024 | 4 Cyl 2.0 L GAS
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  • BMW Timing Chain - 11417843136
    Diagram for BMW Timing Chain - 11417843136
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    BMW Chain

    Part Number: 11417843136
    $77.15 MSRP: $119.26
    You Save: $42.11 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaced by: 11418482272
    Fits the following BMW Models:
    • M5 | 2013-2016 | Sedan(F10)
    • M6 | 2012-2019 | Convertible(F12), Coupe(F13), Gran Coupe(F06)
  • BMW Timing Chain - 13529886258
    Diagram for BMW Timing Chain - 13529886258
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    BMW Timing Chain

    Part Number: 13529886258
    $67.89 MSRP: $104.94
    You Save: $37.05 (36%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 13-52-8-589-971
    Fits the following BMW Models:
    • 328d | 2014-2018 | Sedan(F30)
    • 328d xDrive | 2014-2018 | Sedan(F30), Wagon(F31)
    • X3 | 2015-2017 | xDrive28d(F25)
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  • BMW Timing Chain - 11418482270
    Diagram for BMW Timing Chain - 11418482270
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    BMW CHAIN

    Part Number: 11418482270
    $51.78 MSRP: $78.72
    You Save: $26.94 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Replaces: 11-41-7-527-113, 11-41-7-636-187
    Fits the following BMW Models:
    • 230i | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 230i xDrive | 2017-2021 | 4 Cyl 2.0 L GAS, Convertible(F23), Coupe(F22)
    • 330e | 2016-2018 | Sedan(F30)
    • 330i | 2017-2018 | Sedan(F30)
    • 330i GT xDrive | 2017-2019 | F34
    • 330i xDrive | 2017-2019 | Sedan(F30), Wagon(F31)
    • 340i | 2016-2018 | Sedan(F30)
    • 340i GT xDrive | 2017-2019 | F34
    • 340i xDrive | 2016-2018 | Sedan(F30)
    • 430i | 2017-2020 | Convertible(F33), Coupe(F32)
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  • BMW Timing Chain - 11317834163
    Diagram for BMW Timing Chain - 11317834163
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    BMW Timing Chain

    Part Number: 11317834163
    $85.99 MSRP: $132.93
    You Save: $46.94 (36%)
    Ships in 1-3 Business Days
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    Fits the following BMW Models:
    • M5 | 2006-2010 | Sedan(E60)
    • M6 | 2006-2010 | Convertible(E64), Coupe(E63)
  • BMW Timing Chain - 11412249745
    Diagram for BMW Timing Chain - 11412249745
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    BMW Oil Pump Drive Chain

    Part Number: 11412249745
    $31.06 MSRP: $47.22
    You Save: $16.16 (35%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Chain
    Fits the following BMW Models:
    • 335d | 2009-2011 | Sedan(E90)
    • X5 | 2009-2013 | xDrive35d(E70)
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1-20 of 74 Results

BMW Timing Chain

Instead of a high tensile rubber and fiber timing belt, older vehicles use it to maintain proper synchronization between the camshafts and crankshafts. BMW timing chains were very durable, but could break if a vehicle was regularly used for breaking or suffered complete engine failure. On newer vehicles with timing chains, lack of proper lubrication or faulty tensioners in the engine can also cause issues.

BMW Timing Chain Parts Questions & Experts Answers

  • Q: What are the steps and precautions involved in repairing the camshaft timing chain on BMW 335i?
    A:
    The non-turbo and turbo camshaft timing chain, vibration damper (front pulley) and related parts are similar but not interchangeable; repair requires special tools and new parts; refer to the entire procedure before proceeding. Bent valves from piston contact which can be resulted from disassembly, removal and assembly of camshafts or camshaft adjustment units without special tools. During the process it is necessary to keep the crank and the camshafts locked against rotation with BMW special tools. Start with a scan tool to clear or record the fault memory of the ECM and then turn off the engine then take out the key. Go further to take off the upper and lower cabin microfilter housings, the right strut tower brace, ignition coil cover and disconnect the ignition coil connectors and put the harness away. Dis-connect the ignition coils and the cylinder head cover after which the spark plugs are eliminated. For non-turbo engines position the crankshaft in such a way that cylinder 1 is in TDC firing position with the intake camshaft lobe facing upward and the exhaust camshaft lobe facing downward. When the turbo engines are in position to satisfy requirements, cylinder 1 should be set in TDC firing position and the lobes of 6 should be formed downwards and apart from each other. Disconnect the timing chain tensioner, watch for dripping oil and lift the car to have access to the engine compartment splash guard and the accessory belt. Take off the vibration damper and pull out the crankshaft front seal, insert the crankshaft locking tool through the bell housing into the flywheelOil supply to the crankshaft front and main bearings will be eliminated by rotating the crankshaft until the front end of the crank hits the front bearer and lock it at TDC. Pull of the vibration damper hub by using special tools while tightening the counter hold on the hub. Loosen the plugs at the timing chain housing, then take off the chain guide and tensioning rail bolts, and then, with the aid of the special tool set, secure the camshafts. Both the intake and exhaust camshaft adjustment units should be pulled out then the timing chain assembly and crankshaft sprocket lifted out of the housing. The new timing chain has to be fitted on the pulley /variator cover properly while fitting the crankshaft sprocket in the correct position in reference to the timing chain, and the installment of the timing chain assembly must be done under tension. Bolt the vibration damper hub back in its position by new bolts and follows the standard torque procedures in a manner that cannot allow the crankshaft to rotate. Replace the crankshaft front seal and camshaft adjustment unit, if the timing is improper it should be corrected. Last, the chain tensioner should be fitted, along with the new sealing O-ring; the locking tools should be removed; the engine should be rotated two full revolutions; and the camshaft timing should be checked before the reassembly of the engine.
  • Q: What special tools and procedures are necessary for removing and installing the camshaft timing chain and VANOS units in N52 six cylinder engine on BMW X3?
    A:
    For the removal and installation of VANOS units and for timing of the camshafts, particular tools and processes are required, so one must go through the entire mathematics before beginning with repairs. Opening, taking out and reassembling of camshafts or VANOS units without proper tools often causes additional damage normally resulting in situation such as bent valves due to impact with piston crowns. During the whole process of exchanging the liners, the crankshaft and camshafts should be locked against rotation with the aid of BMW special tools only. Start by turning the engine off and taking out the key, then, take off the cylinder head cover and spark plugs. Turn the crankshaft so as to align cylinder one on top dead center firing position with the cylinder 1 intake camshaft lobe facing upwards. Intake with the aid of the mirror the exhaust camshaft lobe position, then unbolt and remove the timing chain tensioner with an oil collecting pan in place to capture any dripping oil. Lift the vehicle carefully and take off the splash shield, as well as the accessory belt. Loosen the vibration damper and the crankshaft front seal, then pull out the protector plug located in the lower left of the flange of the engine bell housing and fit the crankshaft lock through the bell housing flange hole to the flywheel hole so as to lock the crankshaft at TDC. Do not use them on models with automatic transmission to prevent confusion with the flywheel bore. Slip out the vibration damper hub with the counter hold tool and throw away the hub bolt. There are plugs on the timing chain housing and by unscrewing those remove the chain guide and tensioning rail mounting bolts while there is the special tool set to lock down the camshafts. Also, unbolt and take out the intake and exhaust VANOS units, and disengage the chain with the units, and then temporarily set aside. Raise the timing chain assembly with the crankshaft sprocket out of the timing chain housing and remove the timing chain from the guide and rail assembly and fit a new timing chain as well as check the conditions of the guide rails. Position the crankshaft sprocket to the chain with tooth ends facing each other, tighten the timing chain by stretching it far away from the tDC position and then slip this assembly into the timing chain housing while holding the chain stretched. Fit the timing chain assembly, rail, and guide bolts and tighten them, and then mesh the timing chain and the oil pump chain sprockets and then slide the vibration damper hub into the crankshaft. This is then tightened to final torque on the hub using hydraulic collapse nuts and special tools while seeking assistance. Replace the crankshaft front seal and fit the VANOS units with new bolts; there are two types of VANOS units. The chain tensioner should then be fitted into position, although if the tensioner has been reused, then a new sealing O-ring should be fitted also. Last of all, undo the locking tools and rotate the engine two full times, adjust the camshaft timing if required before rebuilding the engine.
  • Q: What are the steps involved in removing camshaft timing chains on BMW X5?
    A:
    Before the camshaft timing chains are removed the oil pan must be taken off; then the VANOS is removed together with the intake and exhaust camshaft sprockets requiring further disassembly. Single piece manually operated tools that are required for removal and reinstallation of the timing chain to its proper angular relationship with the valvetrain are called BMW specific service tools. No specific measuring marks for camshaft timing when reassembling are given, thus, the procedures must be read closely before starting the work. Remove the negative cable from the battery: always pay attention to battery disconnection precautions. Disconnect the air intake hood above the radiator; also remove the air filter housing, viscous clutch cooling fan, and the fan shroud; you will notice that the radiator cooling-fan nut is left-hand thread. Rotate the engine before removing all accessory belts, and mentally note the direction of rotation of the coolant pump pulley, then unbolt the engine covers and the cylinder head cover. Including the following; Remove the spark plugs and plug the bores so as to avoid the introduction of debris in the engine. Lifting the car safely, the engine cooling system and oil must be drained and that the camshafts be locked in the TDC position using the BMW special tool which locks the crankshaft as well. Pull out the primary camshaft chain tensioner out of the timing chain cover, rather cautiously as the chain tensioner piston is under tension of its spring. Depress the secondary chain tensioner and fasten it, then remove the exhaust camshaft impulse wheel bolts and wheel and finally the spring plate. Screw off the intake camshaft sprocket mounting nuts and the spring plate labeled, and the torx bolts from the exhaust camshaft sprocket. Remove the exhaust and intake cam sprockers, the secondary chain, the thrust spacer and the splined shafts; make a note of the positioning of the splined shafts to facilitate re-fitting in case it is necessary. Here, take out the exhaust camshaft splined sleeve and shaft; at the same time remove the secondary chain tensioner mounting bolts, although the locking pin should remain engaged. Take off the primary chain sprocket mounting studs on the exhaust camshaft and lift off the primary chain sprocket; suspend the timing chain at the end of the exhaust camshaft. Undo the lower guide mounting bolts of the secondary chain and the chain guide, then, in the cylinder head casing, remove the timing chain cover bolts with the emphasis on the fact that the one on the intake camshaft side is longer. The first step is to have the crankshaft vibration damper offline, however, the flywheel locking tool should not be used to lock the crankshaft. Insert two locating dowels in the lower timing cover and take out the timing cover mounting bolts and then push the timing cover forwards to remove it off the cylinder head while exercising some care not to damage the cylinder head gasket. In the case that the gasket is deteriorated, the cylinder head is to be pulled off and bought.

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