Tempo L4-122 2.0L DSL (1984)
Heater Core: Customer Interest
Heater Core - Moaning Noise
Article No. 85-6-14
HEATER CORE MOAN - VEHICLES EQUIPPED WITH DIESEL ENGINES BUILT BETWEEN 10/83 AND 3/8/84
FORD 1984 TEMPO
LINCOLN-MERCURY 1984 TOPAZ
A moan may be heard from the heater core area when the engine is operated above 2100 RPM. To verify the condition perform the diagnostic procedure
described below. If testing indicates a heater core moan, replace the heater core on "heater only" vehicles. On A/C vehicles, replace the heater core and
inlet heater hose.
Diagnostic Test Procedure
1.
Start the engine and accelerate to approximately 2500 RPM to verify the heater core moan condition.
2.
If a heater core moan sound occurs, stop the coolant flow by clamping the heater core inlet hose with "C" clamp or locking pliers applied with
protective pads.
A.
If the heater core moan sound does not stop after stopping the coolant flow, refer to the Noise, Vibration and Harshness (NVH) Diagnosis in
the 1984 Car Shop Manual.
B.
If the moan sound is stopped by clamping the heater inlet hose, stop the engine, remove the clamp and proceed to heater core replacement.
Heater Core Replacement
1.
"Heater Only "Vehicles: Replace the original heater core with a new heater core E4FZ-18476-C. Refer to the 1985 Shop Manual, Volume C,
Section 36- 15 for replacement procedures.
2.
A/C Vehicles: Replace the original heater core with a new heater core E4FZ-18476-B and replace the original inlet heater hose with a new inlet
hose/ flow control valve assembly E53Z-18472-A. Refer to the 1985 Shop Manual, Volume C, Section 36- 47 for replacement procedures.
PART NUMBER
PART NAME
CLASS
E4FZ-18476-C
Heater Core-Heater Only
A
E4FZ-18476-B
Heater Core-Heater A/C
C
E53Z-18472-A
Heater Hose/
C
Flow Control Valve
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: 18476A w/ A/C
TIME:
1.6 Hrs.
OPERATION: 18476B w/o A/C
TIME:
0.7 Hr. DLR. CODING: Basic Part No. 18476 - Code: 56
