TECHNICAL BULLETIN
JTB00349NAS1
03 JUN 2014
SECTION: 303-12C
Supercharger ‘Clattering’ / ‘Knock’ / ‘Rattle’ Noise – 5.0L V8 SC Engine
AFFECTED VEHICLE RANGE:
| F-TYPE (X152) Model Year: 2014 Onwards VIN: K00001 Onwards | Engine: V8 S/C 5.0L Petrol |
| XF (X250) Model Year: 2010-2014 VIN: R47154 Onwards | Engine: V8 S/C 5.0L Petrol |
| XJ Range (X351) Model Year: 2010-2014 VIN: V00001 Onwards | Engine: V8 S/C 5.0L Petrol |
| XK Range (X150) Model Year: 2010-2014 VIN: B32753 Onwards | Engine: V8 S/C 5.0L Petrol |
MARKETS:
NAS
CONDITION SUMMARY:
Situation: A ‘clattering’ / ‘knock’ / ‘rattle’ noise may be heard from the engine.
Cause: This may be caused by torsional isolator and/or the torsional isolator spring support shaft wear causing excessive backlash in the supercharger drive.
Action: Should a customer express this concern, follow the Service Instruction outlined below.
PARTS:
| C2D38554 | Supercharger spring isolator kit – 5.0L V8 SC – XF (X250) – R47154-S61361; XJ (X351) – V00001- V39426; XK (X150) B32753-onwards | Quantity: 1 (as required) |
| C2D38553 | Supercharger spring isolator kit – 5.0L V8 SC – F-TYPE (X152) K00001-onwards; XF (X250) S61362-onwards; XJ (X351) V39427-onwards | Quantity: 1 (as required) |
| AJ811576 | Gasket – Right-hand | Quantity: 1 |
| AJ811590 | Gasket – Left-hand | Quantity: 1 |
WARRANTY:
NOTE: Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to TOPIx to obtain the latest repair time.
NOTE: DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
| DESCRIPTION | SRO | TIME (HOURS) | CONDITION CODE | CAUSAL PART |
|---|---|---|---|---|
| Isolator – Supercharger – Renew – 5.0L V8 SC – FTYPE (X152) | 18.50.69 | 3.7 | 42 | C2D38553 |
| Isolator – Supercharger – Renew – 5.0L V8 SC – XF (X250) – R47154-S61361 | 18.50.69 | 5.2 | 42 | C2D38553 |
| Isolator – Supercharger – Renew – 5.0L V8 SC – XF (X250) – S61362-onwards | 18.50.69 | 4.7 | 42 | C2D38553 |
| Isolator – Supercharger – Renew – 5.0L V8 SC – XJ (X351) – V00001-V39426 | 18.50.69 | 5.2 | 42 | C2D38553 |
| Isolator – Supercharger – Renew – 5.0L V8 SC – XJ (X351) – V39427-onwards | 18.50.69 | 4.7 | 42 | C2D38553 |
| Isolator – Supercharger – Renew – 5.0L V8 SC – XK (X150) – B32753-onwards | 18.50.69 | 4.3 | 42 | C2D38553 |
NOTE: Normal Warranty policies and procedures apply.
SERVICE INSTRUCTION:
- NOTE: Removal of the supercharger drive belt and running of the engine to verify the clattering noise is emanating from the supercharger assembly must be done prior to the fitting of a new supercharger assembly.
Remove the supercharger drive belt and rotate the supercharger pulley by hand:
- If there is a ‘clunk’ / ‘knock’ noise from the supercharger or significant free play when turning the pulley before the rotors start to turn and not one of the symptoms below, install a supercharger spring isolator kit (see TOPIx Workshop Manual, section 303-12C).
- If any of the following symptoms are present, replace the supercharger assembly. To be performed as a separate claim.
- The pulley does not rotate freely (‘sticks’, difficult to move, roughness felt in bearing); and/or
- The blades / rotors are damaged;
- and/or Customer reported excessive ‘whine’ noise.
- QUALITY ASSURED
- Reduces: rough idle, engine surge, hesitation, and spark plus fouling
- 20 oz. bottle.
- Improves: cold start performance, and fuel stability for up to one year
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
- DEEP FUEL SYSTEM CLEANING - Cleans the entire fuel system (injectors, carburetor passageways, intake valves, and chamber areas) to help restore power, MPG, and throttle response.
- FUEL ADDITIVE FOR GASOLINE AND DIESEL ENGINES - Breaks down fuel residues and varnish for smoother idling and cleaner combustion in gasoline and diesel engines.
- OIL TREATMENT FOR ENGINE CLEANING - Cleans sludge and deposits that can restrict oil flow and lubrication in motor oil crankcases, helping support longer engine life in car and truck engines.
- FUEL STABILIZER - Keeps gas or diesel fresh for up to 2 years. Ideal as a fuel stabilizer and gas stabilizer for stored cars, motorcycles, and generators.
- SAFE FOR ALL ENGINES & FUELS - Compatible with all gasoline and diesel fuels and blends, including E10 and E85. Trusted for use as a gasoline and diesel fuel additive.
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
- The world’s #1 fuel additive for both gasoline and diesel engines
- A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
- Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
- Improves fuel economy by burning excess exhaust emissions
- Increases power and acceleration by improving fuel flow and reducing deposit buildup
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
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