Technical Service Bulletins
|Publication Date: November 21, 2007|
|2008 F-Super Duty|
This article supersedes TSB 07-22-2 to update the description in the Issue statement.
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.
Follow the Service Procedure steps to correct the condition.
- Bring engine to normal operating temperatures.
- Raise engine RPM to 2500-2900 range.
- Using a hose clamp tool, crimp the heater inlet hose. If the noise goes away, replace the inlet heater hose.
- 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.
|PART NUMBER||PART NAME|
|7C3Z-18472-K||Heater Hose (With Auxiliary Heat Controls)|
|7C3Z-18472-L||Heater Hose (Without Auxiliary Heat Controls)|
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.
|072402A||2008 F-Super Duty 6.4L Engine: Replace The Inlet Heater Hose, Includes Time To Perform Diagnosis Outlined In The Service Procedure (Do Not Use With 18472A)||1.0 Hr.|
|BASIC PART NO.||CONDITION CODE|