Eldorado V8-350 5.7L DSL (1984)
Water Pump: Technical Service Bulletins
Diesel Engine - Water Pump Usage
Bulletin No. T 84-27
File In Group
6A
Number
49
Date
Dec. '83
SUBJECT:
WATER PUMP USAGE ON 5.7L V-8 DIESEL ENGINE
MODELS AFFECTED: 1978-1984 - ALL MODELS EXCEPT CIMARRON
Water pump package No. 556283 available from GMWDD, now contains a pump with a sheet metal impellor. This pump is also being used on
production engines.
Serviceman Bulletin No. 81-63, File Group 6A, Number 16, defined criteria for the cast iron impellor. It must have square vanes and .045 inch
clearance. It is no longer necessary to be concerned about this if a new pump with the sheet metal impellor is used.