Audi S8 Timing Belt Replacement Interval for 4.2L 40 Valve Models

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What is the recommended Audi S8 timing belt change interval on the 4.2L 40 valve engine? Has the in factory recommended Audi S8 timing belt interval for the 4.2L engines changed? Do we recommend the factory interval, or has our experience moved us to recommend a different change interval?

Factory Recommended Timing Belt Service Interval

Audi S8 Timing Belt Change IntervalWhat is the recommended Audi S8 timing belt change interval on the 4.2L 40 valve engine? Has the in factory recommended Audi S8 timing belt interval for the 4.2L V8 engines changed? Do we recommend the factory interval, or has our experience moved us to recommend a different change interval?

Audi S8 Timing Belt Change IntervalWhat is the recommended timing belt change interval for Audi S8 4.2L 40 valve models? The most recent factory recommend interval is 75,000 miles. Some older scheduled Maintenance Service booklets reference a higher mile timing belt service schedule interval. However, according to the most current manufacturer service schedule information, the interval is 75,000 miles.

What does Blauparts recommend? When dealing with crucial timing belt service, err on the side of caution and change your Audi S8 timing belt every 75,000 miles. It is our recommendation to closely inspect all timing belt components before the recommended interval. Play it safe, changing your timing belt may seem expensive. However, choosing to exceed your timing belt service interval is risky and can lead to unknown repair costs that will far exceed typical timing belt replacement service cost.


Intended Life-Expectancy of Timing Belt Components

Various Audi S8 timing belt component life spans.
In our own service facility, we've seen a few original timing belts last over 100,000 miles and others ready to break before 75,000 miles. In addition to mileage there are other factors that age the timing belt and related components. The following are some reasons why you see the difference in how long an Audi S8 timing belt and related components last: (1) un-logged engine idle times and sitting in traffic; (2) warm-up time in cold weather; (3) environmental climate factors; (4) related engine maintenance that may have been overlooked.

How long do Audi S8 timing belt parts last?How long do Audi S8 timing belt parts last?
Keys to the long-life of your new timing belt components after timing belt replacement. Make your new parts last! You can expect your new BLAU OFFICIAL O.E. components to last the specified 75,000 mile interval if the following important steps were taken:

1) Timing belt service was performed using BLAU OFFICIAL O.E. components. The same timing belt and timing belt tensioner(s) that were fitted on your Audi S8 from the factory, which are engineered to meet factory interval requirements.

2) Timing belt service was performed by an experienced competent ASE certified Audi mechanic who is familiar with the Audi 4.2L 40 valve V8 timing belt system engine.

3) Factory service procedures must be strictly followed. Even if installing the best parts, using improper procedures can shorten their life span. Incorrect installation or missteps during timing belt service are often done without intent and aren't noticed until further down the road. Fortunately, some common mishaps are noticed after re-assembly and during the final engine rotational timing sequences.

Audi S8 Timing Belt Replacement Kits

NEW! BLAU OFFICIAL O.E.tm INA Audi S8 Timing Belt Kits for 4.2L 40 Valve Engine

2001 Models with Early VIN

2001 engines had a VIN split with two different timing belt tensioner possibilities. 2001 owners will also need to confirm their VIN #. This kit is for the early VIN system, up to VIN 010500. How To Decipher Your Audi VIN Number.

  • Base INA Audi S8 Timing Belt Kit 4.2L

    INA Base Audi Timing Belt KitBASE

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Buy Audi S8 Timing Belt Kit Base

    Preassembled BASE kit comes directly from our partner Schaeffler who has been manufacturing timing belt components under the Official O.E. INA brand for decades. These kits include the same manufactured brand of timing belt and timing belt tensioner(s), the same ones that were fitted on your car from the factory.
  • Enhanced INA Audi S8 Timing Belt Kit 4.2L

    INA Enhanced Audi Timing Belt KitENHANCED

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Other Components:
    • Graf Audi S8 Water Pump
      w/ Metal Impeller and Gasket
    • Audi S8 Thermostat w/ O-Ring
    • Audi S8 Flennor Gates
      Serpentine Belt
    • Front Crank Seal
    • Camshaft Seals

    also included...

    Blauparts Extras
    • Allen Bolts for Lower
      Crankshaft Pulley
    • Thread Locking Compounds
    • Anti Seize Compound
    • Blauparts Detailed Step-by-Step
      Audi S8 4.2L Timing Belt
      Instructions - Numerous pages
      and images of detailed step-by-
      step guidelines, including front
      bumper removal.

    Buy Audi S8 Timing Belt Kit Enhanced
  • Enhanced Plus INA Audi S8 Timing Belt Kit 4.2L

    INA Enhanced + Audi Timing Belt KitENHANCED +

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Other Components:
    • Graf Audi S8 Water Pump
      w/ Metal Impeller and Gasket
    • Audi S8 Thermostat w/ O-Ring
    • Audi S8 Flennor Gates
      Serpentine Belt
    • Front Crank Seal
    • Camshaft Seals
    6 Liters German Ravenol G12   Plus Antifreeze (4 - 1.5L Bottles)

    also included...

    Blauparts Extras
    • Allen Bolts for Lower
      Crankshaft Pulley
    • Thread Locking Compounds
    • Anti Seize Compound
    • Blauparts Detailed Step-by-Step
      Audi S8 4.2L Timing Belt
      Instructions - Numerous pages
      and images of detailed step-by-
      step guidelines, including front
      bumper removal.

    Buy Audi S8 Timing Belt Kit Enhanced +

2001 Models with Later VIN

2001 engines had a VIN split with two different timing belt tensioner possibilities. 2001 owners will also need to confirm their VIN #. This kit is for the later VIN system, and VIN's that are after 010501 . How To Decipher Your Audi VIN Number.

2002-2003 Models

2002-2003 model years had only one timing belt system option. Owners will NOT need to confirm their engine code or VIN #.

  • Base INA Audi S8 Timing Belt Kit 4.2L

    INA Base Audi Timing Belt KitBASE

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Buy Audi S8 Timing Belt Kit Base

    Preassembled BASE kit comes directly from our partner Schaeffler who has been manufacturing timing belt components under the Official O.E. INA brand for decades. These kits include the same manufactured brand of timing belt and timing belt tensioner(s), the same ones that were fitted on your car from the factory.
  • Enhanced INA Audi S8 Timing Belt Kit 4.2L

    INA Enhanced Audi Timing Belt KitENHANCED

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Other Components:
    • Graf Audi S8 Water Pump
      w/ Metal Impeller and Gasket
    • Audi S8 Thermostat w/ O-Ring
    • Audi S8 Flennor Gates
      Serpentine Belt
    • Front Crank Seal
    • Camshaft Seals

    also included...

    Blauparts Extras
    • Allen Bolts for Lower
      Crankshaft Pulley
    • Thread Locking Compounds
    • Anti Seize Compound
    • Blauparts Detailed Step-by-Step
      Audi S8 4.2L Timing Belt
      Instructions - Numerous pages
      and images of detailed step-by-
      step guidelines, including front
      bumper removal.

    Buy Audi S8 Timing Belt Kit Enhanced
  • Enhanced Plus INA Audi S8 Timing Belt Kit 4.2L

    INA Enhanced + Audi Timing Belt KitENHANCED +

    Preassembled BASE INA Kit:
    • INA Gates Audi S8 Timing Belt
    • NTN Audi S8 Timing Belt
      Tensioner and Lever
      w/ Genuine Hardware
    • NTN Audi S8 Timing Belt
      Hydraulic Tensioning Damper
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Eccentic Idler
      w/ Genuine Hardware
    • INA Audi S8 Timing Belt
      Tensioner Idler
      w/ Genuine Hardware
    • Timing Belt Service Interval
      Sticker

    Other Components:
    • Graf Audi S8 Water Pump
      w/ Metal Impeller and Gasket
    • Audi S8 Thermostat w/ O-Ring
    • Audi S8 Flennor Gates
      Serpentine Belt
    • Front Crank Seal
    • Camshaft Seals
    6 Liters German Ravenol G12   Plus Antifreeze (4 - 1.5L Bottles)

    also included...

    Blauparts Extras
    • Allen Bolts for Lower
      Crankshaft Pulley
    • Thread Locking Compounds
    • Anti Seize Compound
    • Blauparts Detailed Step-by-Step
      Audi S8 4.2L Timing Belt
      Instructions - Numerous pages
      and images of detailed step-by-
      step guidelines, including front
      bumper removal.

    Buy Audi S8 Timing Belt Kit Enhanced +