Fleetwood FWD V8-273 4.5L (1988)
Engine Block Heater: Technical Service Bulletins
Engine Block Heaters - Revised Information
Bulletin No.: T-93-130
File in Group: 16
Number: 50
Corp.Ref.No.: 316104
Date: Aug. 1993
SUBJECT:
INFORMATION ON ENGINE BLOCK HEATERS
MODELS AFFECTED:
ALL 1982-1994 CADILLACS WITH 4.1L, 4.5L, 4.9L V8 ENGINE
Beginning with model year 1987, 4.1L V8 engines received a structural redesign to the engine crankcase which prevents the 1982 through 1986
clamp-on engine block heater from being used. Consequently a revised block heater was released.