ENGINE AND ENGINE REBUILDING 105
Big block V8 cylinder head bolt tightening se-
quence
NOTE:
Coat a steel gasket, thinly and
evenly, on both sides with sealer. If a steel
asbestos gasket is used, do not apply sealer.
Clean the bolt threads, apply sealing com-
pound and install the bolts finger tight.
8. Tighten the head bolts a little at a time
in the sequence illustrated to the specified
torque.
9. Install the exhaust and intake mani
folds.
10. Adjust the valves.
OVERHAUL
1. With cylinder head removed, remove
valve rocker arm nuts, balls and rocker arms
(if not previously done).
2. Using Tool J-15062, or equivalent,
compress the valve springs and remove stem
keys. Release the compressor tool and re
move rotators or spring caps, oil shedders,
springs and damper assembly, then remove
oil seals and valve spring shims.
3. Remove valves from cylinder head and
place them in a rack in their proper sequence
so that they can be assembled in their origi
nal positions. Discard any bent or damaged
valves.
4. Clean all carbon from combustion
chambers and valve ports using 2 wire brush.
5. Thoroughly clean the valve guides us
ing a suitable wire bore brush.
6. Clean all carbon and sludge from push
rods, rocker arms and push rod guides. Dis
card bent push rods.
7. Clean valve stems and heads on a buff
ing wheel.
8. Clean carbon deposits from head gas-
ket mating surface Be careful not to score the
machined gasket surface while cleaning.
9. Inspect the cylinder head for cracks in
the exhaust ports, combustion chambers, or
external cracks to the water chamber.
10. Inspect the valves for burned heads,
cracked faces or damaged stems.
NOTE:
Excessive valve stem to bore clear-
ance will cause excessive oil consumption
and may cause valve breakage. Insufficient
clearance will result in noisy and sticky
functioning of the valve and disturb engine
smoothness.
11. Measure valve stem clearance as fol
lows:
a. Clamp a dial indicator on one side of
the cylinder head rocker arm cover gasket
rail.
b. Locate the indicator so that move-
I®
Small block V8 cylinder head bolt tightening se-
quence
Measuring valve stem clearance with dial gauge
Checking valve spring tension—typical
