Cutlass Ciera FWD V6-260 4.3L DSL (1982)
Lifter / Lash Adjuster: All Technical Service Bulletins
Engine - Excessive Exhaust Smoke and Abnormal Noise
SUBJECT
V-6 DIESEL ENGINE - EXCESSIVE EXHAUST
NUMBER: 83-T-23
SMOKE AND ABNORMAL ENGINE NOISE AT HIGHWAY SPEEDS
DATE:
March 16, 1984
MODELS/YEARS
1982-83 CUTLASS SUPREME &
CUTLASS CIERA
SECTION: 6A
CONDITION
Some 1982 and 1983 Oldsmobiles equipped with a V-6 diesel engine may experience excessive black exhaust smoke and abnormal engine noise after
being driven several miles at highway speeds.
CAUSE
At highway speeds, crankcase blowby in the engine flows through the oil drain back holes in the block and cylinder head. This restricts oil return from
the top of the cylinder head to the crankcase. The level of oil may increase on top of the cylinder head to the point it is drawn into the engine crankcase
ventilation system. This will result in excessive exhaust smoke and engine noise. The oil level in the engine may be one pint to one quart low after this
occurrence.
CORRECTION
1.
Oil drawn into the engine may damage the ring land on a piston, causing an increase in blowby. Remove the oil fill cap and see if there is
excessive vapor coming out. If there is, perform a compression test on each cylinder to determine if there is piston ring land damage. Pistons with
damaged lands must be replaced.
2.
Follow service manual procedures for removal of injection pump, lines, valve covers and intake manifold. Remove the lifters and examine the
lifter bores for any machining irregularities or any bore wear that will allow an increase in oil flow out of the top of the lifter bore.
3.
Install valve lifters, part no. 5234464 (standard) or part no. 5234491 (.010 oversize). These lifters have reduced oil flow. It is essential that a
standard lifter not be installed in a .010 oversize bore. Put the lifter in halfway and wiggle it. It should be tight.
4.
Follow valve lifter bleed down instructions in the service manual.
5.
Probe the four drain back holes in the lifter area of the block to make sure they are not plugged.
6.
Examine the cast hole between the bolt holes for the lifter retainer. There should be no more than 1/8 in. of casting flash around the edge of the
hole. Carefully break off and discard any extra flashing.
7.
Install a new lifter retainer, part no. 22522529.
8.
Probe the oil drain, back holes in each end of the cylinder head to make sure they are not plugged.
9.
Use care upon reassembly not to use too much RTV sealer on the intake manifold and valve cover. Engines that have standoff clips or dimples use
a 1/4 in. diameter bead. Other engines use a 1/8 in. diameter bead. The use of excessive sealer may result in pieces of sealant plugging the oil drain
back holes.
PARTS INFORMATION
NAME
PART NUMBER
QUANTITY
Valve Lifter (standard)
5234464
12
Valve Lifter (.010 oversize)
5234491
A.R.
Lifter Retainer
22522529
1
WARRANTY INFORMATION
Use existing labor operation and time allowance, which includes adjusting pump timing. Use applicable trouble code.