Fulltext TSBs

Technical Service Bulletins

TSB
98-12-12
  • HEATER – “MOAN” AT 1400-1800 RPM OR “HOOTING” NOISE HEARD AT 1200-2000 RPM ACCELERATION OR DECELERATION – VEHICLES WITH 4.6L ENGINE
  • NOISE – “MOAN” AT 1400-1800 RPM OR “HOOTING” AT 1200-2000 RPM ACCELERATION OR DECELERATION – VEHICLES WITH 4.6L ENGINE
Publication Date: JUNE 22, 1998

LIGHT TRUCK:
1997-1998 F-150, F-250 LD

ISSUE:

A heater “moan” at 1400-1800 rpm steady state, or “hooting” 1200-2000 rpm acceleration or deceleration may be heard on some vehicles. This may be due to water pump pulsations.

ACTION:

Replace the heater inlet hose with a revised heater inlet hose.

SERVICE PROCEDURE

  1. Verify concern by clamping off the heater core inlet hose to stop coolant flow and listening for moaning or hooting noise.
  2. If noise is still present, check for other causes.
  3. If noise goes away, replace the heater inlet hose with revised hose. Refer to the appropriate Workshop Manual for replacement procedure.
  4. Verify repair.

PART NUMBERPART NAME
F85Z-18472-ABHeater Inlet Hose

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATIONDESCRIPTIONTIME
981212AReplace Heater Inlet Hose0.7 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
18K57933

OASIS CODES:

208000, 208999, 402000, 702000, 702100, 702300


Copyright 1998 Ford Motor Company