GMC S Series 1994, Руководство по ремонту

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3. Camshaft and balance shaft cup plugs (89) to
proper depth.
• Coat plug outside diameter with sealant (GM
P/N 1052080 or equivalent).
4. Oil filter adapter, gasket, and bolts.
S t
Tighten
• Bolts to 22 N-m (16 lbs. ft.)
5. Coolant drain plugs.
$
Tighten
• Plugs to 30 N-m (22 lbs. ft.).
6. Oil pressure fitting and sensor.
❖
• Fitting to 11 N-m (96 lbs. in.) plus turn for align­
ment if necessary.
PISTON AND CONNECTING
ROD ASSEMBLY
NOTICE: The connecting rod and cap need to
be stored together as mating parts, so they
may be reassem bled in the sam e wear pat­
tern an d balance from which th e y were
removed.
Refer to SECTION 6A and perform the following:
Disassemble
• Components as required.
• Mark the parts if required.
• Marking them from the front to the rear, with the
engine in an upright position and viewed from the
front.
— The right bank is numbered 1-3-5.
— The left bank is numbered 2-4-6.
j y | Clean
Components as outlined.
Inspect
Components as outlined.
Measure
*
Piston pin diameter and clearance.
Piston-to-bore clearance and fit pistons as outlined.
Ring end gap and ring clearance.
Assemble
Components as outlined.
Check the connecting rod and cap for identification
marks.
The numbers on the connecting rod and bearing
cap must be on the same side when installed in
the cylinder bore. If a connecting rod is ever trans­
posed from block or cylinder to another, new con­
necting rod bearings should be fitted and the
connecting rod should be numbered to correspond
with the new cylinder number.
L*
Inspect
• Ring fit.
UPPER AND LOWER INTAKE
AND EXHAUST MANIFOLDS
❖
Disassemble
• Fuel control and all electrical components from the
upper and lower intake manifolds. Refer to the
1993 Light Duty Truck Fuel and Emissions Service
Manual for the removal of these components.
Clean
NOTICE: Do not immerse the upper or lower
intake manifolds in solvent with electrically
operated com ponents attached or damage
may occur to these components.
NOTICE: Do not clean the manifolds with any
solution that contains silicone to prevent
possible oxygen sensor contamination.
• Old pieces of gasket from the gasket surfaces.
• Excessive carbon buildup in the exhaust passages
of the intake manifold.
• Scale and deposits from the coolant passages of
the intake manifold.
• EGR passage of excessive carbon deposits.
Inspect (Figure 24)
• Manifolds for cracks, broken flanges, and gasket
surface damage.
• Alignment (flatness) of exhaust manifold flanges
and upper and lower intake manifold mating sur­
faces. Use a straight edge and feeler gage. If the
flanges or mating surfaces do not align, the mani­
fold is warped and should be replaced (figure 24).
A. Straight Edge
B. Feeler Gage
V0571