Celebrity V6-260 4.3L DSL (1982)
Technical Service Bulletin # 82I148VIT
Date: 830501
Diesel Engine - Altitude Performance Adjustments
Number:
82-I-148
Section:
VIt
Date:
May, 1983
Subject:
1982 ALTITUDE PERFORMANCE ADJUSTMENTS 4.3L V6 DIESEL ENGINE
TO:
ALL CHEVROLET DEALERS
The following information describes which vehicles, equipped with a 4.3L V6 diesel engine, require altitude adjustments and which are "all altitude"
systems.
1982 Federal Monte Carlo models equipped with 4.3L V6 diesel engines (Engine Family C364.3D7ZZT7) will be manufactured with either high or low
altitude diesel emission systems. Cars equipped with the high altitude emission system will be invoiced with option NA6. The type of system can also be
identified by the emission label attached to the fan shroud. The label will indicate that the car was built for primary use at either high or low altitude.
These procedures are considered altitude performance adjustments and apply only to in-use vehicles. They should not be used to modify vehicles prior to
sale.
1982 California Monte Carlo models and 1982 Federal and California Celebrity models equipped with 4.3L V6 diesel engines (Engine Family
C3G4.3D7ZZK6) were manufactured with all altitude" diesel emission systems. Altitude performance adjustments must not be used on "all altitude"
vehicles.
Conversion of Low Altitude System to High Altitude
Dealers in high altitude areas should encourage owners who have moved to high altitude counties to purchase the following adjustment procedure. This
adjustment is considered an owner maintenance expense.
FIGURE 1
1.
Replace the EGR valve vacuum control assembly and vacuum modulator valve with the assemblies shown in Figure 1. Refer to Parts
Information for part numbers.
2.
Install magnetic tachometer probe and start engine. Allow
