Engine - Intermittent Scratching/Rattling Noise
TSB 12-3-103/08/12
03/08/12
5.0L - INTERMITTENT METALLIC RATTLE OR
SCRATCHING TYPE NOISE - WARM ENGINE AT IDLE
FORD:
2011-2012 Mustang, F-150
This article supersedes TSB 11-12-12 to update the Service Procedure and warranty causal part number.
ISSUE
Some 2011-2012 F-150 and Mustang vehicles (excluding Boss) equipped with a 5.0L engine may exhibit an intermittent metallic rattle or scratching type noise in the area at the front of the left hand or driver side cylinder head at idle with the engine at operating temperature.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1. Determine engine build date. Refer to Workshop Manual (WSM), Section 303-01.
a. If engine build date is on or before 11/10/2011, proceed to Step 2.
b. If engine build date is on or after 11/11/2011, do not continue with this procedure. Refer to the WSM, Section 303-00 for normal diagnostics.
2. Warm the engine to operating temperature.
3. Using a mechanic's stethoscope or EngineEAR, listen for a metallic type rattle or scratching type noise at the front of LH cylinder head.
4. Is the noise heard in areas shown? (Figures 1 and 2)
a. Yes - Proceed to Step 5.
b. No - This article does not apply.
5. Remove accessory drive belt, refer to WSM, Section 303-05. Is noise still present?
a. Yes - Proceed to Step 6.
b. No - Replace the coolant pump. Refer to WSM, Section 303-03A.
6. Is the noise heard in the areas shown? (Figures 1 and 2)
a. Yes - Replace the LH primary tensioner and timing chain tensioner arm using the kit part number provided in this article. Refer to WSM, Section 303-01B.
b. No - This article does not apply. Refer to WSM, Section 303-00 for normal diagnostics.
NOTE
FAILURE TO REPLACE BOTH THE PRIMARY TENSIONER AND TIMING CHAIN TENSIONER ARM MAY RESULT IN OVERLOADING OF THE TIMING CHAIN AND UNDER CERTAIN CONDITIONS COULD LEAD TO TIMING CHAIN FAILURE.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
OPERATION DESCRIPTION TIME
120301A 2011-2012 F-150 5.0L: 1.5 Hrs.
Replace The Coolant
Pump Includes Time To
Diagnose (Do Not Use
With Any Other Labor
Operations)
120301A 2011-2012 Mustang 5.0L: 1.7 Hrs.
Replace The Coolant
Pump Includes Time To
Diagnose (Do Not Use
With Any Other Labor
Operations)
120301B 2011-2012 F-150 SOL: 5.3 Hrs.
Replace The LH Timing
Chain Tensioner And
Tensioner Arm Includes
Time To Diagnose (Do Not
Use With Any Other Labor
Operations)
120301B 2011-2012 Mustang 5.0L: 5.4 Hrs.
Replace The LH Timing
Chain Tensioner And
Tensioner Arm Includes
Time To Diagnose (Do Not
Use With Any Other Labor
Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
8501 42
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