A/C - Heater Core Gurgling Noise
TSB 07-24-212/10/07
6.4L ENGINE BUILT BEFORE 06/18/2007 - HEATER CORE NOISE - ALSO DESCRIBED AS GURGLING, RATTLE, OR SCRAPING NOISE
FORD:
2008 F-Super Duty
This article supersedes TSB 07-22-2 to update the description in the Issue statement.
ISSUE
Some 2008 F-Super Duty vehicles equipped with a 6.4L engine and built before 6/18/2007 may exhibit a gurgling type noise coming from the heater core. It has also been described as a rattle or scraping noise. It has also been incorrectly identified as a torque converter concern.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1. Bring engine to normal operating temperatures.
2. Raise engine RPM to 2500-2900 range.
3. Using a hose clamp tool, crimp the heater inlet hose. If the noise goes away, replace the inlet heater hose.
4. If the noise does not go away, proceed with normal diagnostics. Refer to the Workshop Manual (WSM), Section 100-04.
NOTE
DO NOT ADD AN ADDITIONAL RESTRICTOR TO THE LINE OR MANUALLY MOVE THE EXISTING RESTRICTOR.
NOTE
DO NOT REPLACE THE HEATER CORE.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
072402A 2008 F-Super Duty 6.4L 1.0 Hr.
Engine: Replace The Inlet
Heater Hose, Includes
Time To Perform
Diagnosis Outlined In The
Service Procedure (Do Not
Use With 18472A)
DEALER CODING
CONDITION
BASIC PART NO. CODE
18K579 42
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