K 10 1/2 Ton Pickup 4WD V8-379 6.2L DSL VIN C FI (1982)
Injection Timing: By Symptom
Technical Service Bulletin # 83I41VI
Date: 830201
Diesel Engine - Excessive Exhaust Smoke, Rough Running
Number:
83-I-41
Section:
VI
Date:
FEB., 1983
SUBJECT:EXCESSIVE EXHAUST SMOKE ROUGH RUNNING DIESEL ENGINES 1980-83 PASSENGER CAR
TO:
ALL CHEVROLET DEALERS
Diesel engines that exhibit excessive exhaust smoke and run rough after cold starting may usually be corrected by dynamic timing. If timing
does not correct this condition check the housing pressure cold advance (HPCA) for proper operation (1981 thru 1983 models). Also check
for a sticking advance piston in the injection pump (1980 thru 1983 models).
To check for a sticking advance piston, push in on the bottom of the face cam lever on the right side of the injection pump. This will retard
the timing and cause the engine to run rough if the advance piston is free. If there is no change, the piston is sticking.
Technical Service Bulletin # 83I41VI
Date: 830201
Diesel Engine - Excessive Exhaust Smoke, Rough Running
Number:
83-I-41
Section:
VI
Date:
FEB., 1983
SUBJECT:EXCESSIVE EXHAUST SMOKE ROUGH RUNNING DIESEL ENGINES 1980-83 PASSENGER CAR
TO:
ALL CHEVROLET DEALERS
Diesel engines that exhibit excessive exhaust smoke and run rough after cold starting may usually be corrected by dynamic timing. If timing
does not correct this condition check the housing pressure cold advance (HPCA) for proper operation (1981 thru 1983 models). Also check
for a sticking advance piston in the injection pump (1980 thru 1983 models).
To check for a sticking advance piston, push in on the bottom of the face cam lever on the right side of the injection pump. This will retard
the timing and cause the engine to run rough if the advance piston is free. If there is no change, the piston is sticking.
Technical Service Bulletin # 83I17
Date: 821201
Engine - High Altitude Adjustment
Number:
83-I-17
Section:
VI
Date:
Dec., 1982
Subject:
HIGH ALTITUDE ADJUSTMENT - 1982 "C-K" TRUCKS WITH 6.2L DIESEL ENGINE AND LH6 (LIGHT DUTY EMISSIONS)
TO:
ALL CHEVROLET DEALERS
These adjustments are considered altitude performance adjustments and apply only to in-use vehicles. They should not be used to modify
vehicles prior to sale.
1982 trucks equipped with the 6.2L .diesel engine for low altitude, operation may be modified if operation is changed to high altitude for an
extended period or permanently. Dealers in high altitude areas should encourage owners who have moved to high altitude counties to
purchase the service adjustment procedure outlined below, which is considered an owner maintenance expense. High altitude is defined as
4000 feet and above. Vehicles designed for principal use at low altitude can be identified by P/N 14050587, injection pump, on light duty
emission (LH6) vehicles.
Operation of the 6.2L diesel at high altitudes without modification can result in excessive emission of black exhaust smoke due to low air
density. Modification involves the recalibration of the fuel injection pump to a different fuel rate which will compensate for the lower air
