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305-350 ENGINE
6A6-11
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 (Fig. 6A6-20).
6. Install exhaust manifolds as previously outlined.
7. Install intake manifold as previously outlined.
8. Install and adjust valve mechanism as previous1
outlined.
Fig. 6A6-20 Cylinder Head Bolt Torque Sequence
ROCKER A R M STUDS
Fig. 6A6-22 Reaming Rocker Arm Stud Bore
Replacement
Rocker arm studs that have damaged threads or are
loose in cylinder heads should be replaced with new studs
available in .003" and .013" oversize. Studs may be installed
after reaming the holes as follows:
1. Remove old stud by placing Tool J 5802-1 over the
stud, installing nut and flat washer and removing stud by
turning nut (Fig. 6A6-21).
Fig. 6A6-23 Installing Rocker Arm Stud
VALVE GUIDE BORES
Fig. 6A612 1 Removing Rocker Arm Stud
2. Ream hole for oversize stud using Tool J 5715 for
.003" oversize or Tool J 6036 for .013" oiersize (Fig. 6A6-
22).
CA UTI 0 N: Do not attempt to instaff an oversize
stud without reaming stud hole.
3. Coat press-fit area of stud with hypoid axle lubricant.
Install new stud, using Tool J 6880 as a guide. Gauge should
bottom on head (Fig. 6A6-23).
Valves
with
oversize stems are available
(see
specifications). T o ream the valve guide bores for oversize
valves use Tool Set J 5830.
VALVE SEATS
Reconditioning the valve seats is very important,
because the seating of the valves must be perfect for the engine
to deliver the power and performance built into it.
Another important factor is the cooling of the valve
heads. Good contact between each valve and its seat in the
head is imperative to insure that the heat in the valve head
will be properly carried away.
Several different types of equipment are available for
reseating valve seats. The recommendations
of the
manufacturer of the equipment being used should be carefully
followed to attain proper results.
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