Chevrolet 10 Series 1968, Руководство по обслуживанию

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ENGINE 6-31
NOTE:
Grease may be used to hold the locks in
place while releasing the compressor tool.
366, 396 and 427 cu. in. Engines
a. Install new valve stem oil seal (coated with oil)
in position over valve guide.
b. Set the rotator (exhaust valve) (366 and 427 cu. in.
engines), valve spring and damper and valve cap
in place.
c. Compress the spring with Tool J-5892 and install
the valve locks then release the compressor tool,
making sure the locks seat properly in the groove
of the valve stem.
NOTE: Grease may be used to hold the locks
in place while releasing the compressor tool.
7. Install spark plug, using a new gasket, and torque
to specifications.
8. Install and adjust valve mechanism as outlined.
Cylinder Head Assemblies
Removal
1. Remove intake manifold as outlined.
2. Remove exhaust manifolds as outlined.
3. Remove valve mechanism as outlined.
4. Drain cylinder block of coolant.
5. Remove cylinder head bolts, cylinder head and gas­
ket. Place cylinder head on two blocks of wood to
prevent damage.
Installation
CA U TIO N : The gaskets surfaces on both the
head and the block must be clean of any foreign
matter and free of nicks or heavy scratches.
Cylinder bolt threads in the block and threads on
the cylinder head bolts must be clean. (Dirt
will affect bolt torque.)
1. On engines using a STEEL gasket, coat both sides of
a new gasket with a good sealer. Spread the sealer
thin and even. One method of applying the sealer
that will assure the proper coat is with the use of a
paint roller. Too much sealer may hold the gakset
away from the head or block.
CA U TIO N :
Use no sealer on engines using a
composition STEEL ASBESTOS gasket.
2. Place the gasket in position over the dowel pins with
the bead up.
3. Carefully guide the cylinder head into place over the
dowel pins and gasket.
4. Coat threads of cylinder head bolts with sealing
compound and install bolts finger tight.
5. Tighten each cylinder head bolt a little at a time in
the sequence shown in the torque sequence chart until
the specified torque is reached.
6. Install exhaust manifolds as outlined.
7. Install intake manifold as outlined.
8. Install and adjust valve mechanism as outlined.
Oil Pan
Rem oval
1. Drain engine oil.
2. Remove oil dip stick and tube.
3. On vehicles so equipped remove exhaust crossover
pipe.
F ig . 5 V —Compressing V a lv e Spring
4. On vehicles equipped with automatic transmission
remove converter housing under pan.
5. Remove starter brace and inboard bolt, swing starter
aside.
6.
On
C E
10-20-30.
a. Remove engine front mount bolts (frame bracket-
to-mount).
b. Using a suitable jack with a flat piece of wood
(to prevent damaging oil pan), raise engine enough
to insert 2” x 4" wood blocks between the engine
mounts and frame brackets.
7. Remove oil pan and discard gaskets and seals.
Installation
1. Thoroughly clean all gasket and seal surfaces on oil
pan, cylinder block, crankcase front cover and rear
main bearing cap.
2. Install new oil pan side gaskets on cylinder block
using gasket sealer as a retainer. Install new oil
pan rear seal in rear main bearing cap groove, with
ends butting side gaskets. Install new oil pan front
seal in groove in crankcase front cover with ends
butting side gaskets (fig.
6 V ).
3. Install oil pan and torque bolts to specifications.
4. Install starter brace and attaching bolts. Torque
bolts to specifications.
5. On
C E
10-20-30
a. Lower engine and install front mount through
bolts.
b. Torque bolts to specifications.
6. Install converter housing under pan (if removed).
7. Install exhaust crossover pipe (if removed).
8. Install oil dip stick tube and dip stick.
9. F ill with oil, start engine and check for leaks.
CHEVROLET TRUCK SERVICE MANUAL