TSB C: EXPERTEC TSB (89-272-6F)

Details

WARNING: This page is about the Forward Control 3.9 L, Automatic, 3L80-HD/M40, which is a different variant/trim than selected. Publication date: 1989-10-17 Reference number: 89-272-6F EXPERTEC TSB EXPERTEC TSB TECHNICAL SERVICE BULLETIN Reference Number(s): 89-272-6F, Date of Issue:  10/17/89 NEW EXHAUST MANIFOLD NOISE CONDITION NEW PART Model(s): 1985-89 P TRUCKS WITH 4.8L (VIN T) ENGINE Date: 10/17/1989 Bulletin Number: Chevrolet 89-272-6F DESCRIPTION Some 1985-89 P-Trucks with 4.8L engines may experience a condition where an exhaust leak develops between the manifold and cylinder head mating surface causing a noise condition. Starting in late 1989 production, a new nodular iron exhaust manifold was released for the 4.8L engine. This new manifold may be used to repair leaking exhaust manifolds on earlier year trucks. The new manifold part number is 10141251. Parts are expected to be available on November 6, 1989. Until then normal part orders will not be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealers' expense. All other order types will be canceled as incorrectly ordered while the 400 control is in place. WARNING: PART NUMBER 10141251 DOES NOT INCORPORATE AN E.F.E. (EARLY FUEL EVAPORATION) VALVE WHICH IS NOT REQUIRED WHEN THE NEW MANIFOLD IS USED. CAP VACUUM FITTING AND REMOVE E.F.E. LINES PER ATTACHED ILLUSTRATION. Use applicable labor time and operation number. BULLETIN ILLUSTRATION LIST Fig 1: GRAPHIC Courtesy of GENERAL MOTORS CORP.