Thermactor Air Bypass Valve - Hissing/Moaning Noise
83ford6 Article No. 83-23-21NOISE - EMISSION CONTROL, THERMACTOR AIR BYPASS VALVE - (3.8L, 5.0L, AND 5.8L) - MANUAL TRANSMISSION VEHICLES WITH 3.8L OR 5.0L ENGINES AND ANY 5.8L VEHICLE OVER 8500 LB. GVW
LIGHT TRUCKS 1982/83 E & F SERIES
Under certain conditions, a "hissing" or "moan" noise may be audible in the passenger compartment of the subject vehicles. This noise may be emanating from the Air Bypass Valve during normal venting of thermactor air to the atmosphere.
The following procedure should minimize this concern:
1. Accurately define customer concern.
2. For vehicles equipped with thermactor bypass valve (Part No. E1TE-9B289-DA or DB) discard and replace with thermactor bypass valve (Part No. E3TZ-9B289-G) and ensure valve is oriented in same position as original.
3. For vehicles equipped with thermactor bypass valve (Part No. E3TE-9B289-BA or BB) discard and replace with thermactor bypass valve (Part No. E3TZ-9B289-H) and ensure valve is oriented in same position as original.
4. Road test vehicle to ensure the condition has been eliminated.
Obtain an Authorized Modifications decal and list the date, dealer number and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information decal suitable for installing the Authorized Modifications decal. Clean the area, install the decal and cover it with a clear plastic decal shield.
PART NUMBER PART NAME CLASS
E3TZ-9B289-G Air Bypass Valve B
E3TZ-9B289-H Air Bypass Valve B
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION/TIME: Refer to the Labor Time Standards Manual for applicable operation and time.
DLR. CODING: Basic Part No. 9B289 Code: 56