TM 5-3895-346-14
CYLINDER BLOCK
ENGINE OVERHAUL
16. Place the side of the cylinder block
against the adaptor plate on the overhaul stand (Fig.
6). Use adaptor plate J 7622-01 (in-line engine),
with overhaul stand J 6837-01.
17. Align the boltholes in the adaptor plate
with the holes in the cylinder block. Then install the
3/8-16 and 5/16-18 bolts, with a flat washer under
the head of each bolt, and tighten them securely.
WARNING
Be sure the engine is
securely mounted to the
overhaul stand before
releasing the lifting
sling. Severe injury to
personnel
and
destruction of engine
parts will result if the
engine breaks away
from
the
overhaul
stand.
18. With the engine mounted on the
overhaul stand, remove all the remaining
subassemblies and parts from the cylinder block.
The procedure for removing each subassembly from
Figure 6. Lifting Engine with Spreader and Sling
the cylinder block, together with disassembly,
inspection, repair, and reassembly of each, will be
found in the various sections of this manual.
After stripping, the cylinder block must be thoroughly cleaned and inspected.
Clean Cylinder Block
1.
Remove all of the plugs (except cup plugs) and scrape all old gasket material from the block.
2.
Clean the block with live steam. Make sure the oil galleries, air box floor, and air box drain
openings are thoroughly cleaned. On former engines, jets machined in the camshaft and balance shaft bores
(in-line engines) permit oil to be sprayed on the cam followers. Make sure they are not plugged. A 0.020 inch
wire may be used to clean the jets.
3.
Dry the block with compressed air.
Pressure Test Cylinder Block
After the cylinder block has been cleaned, it must be pressure tested for cracks or leaks by either one of two
methods. In either method, it will be necessary to make a steel plate of 1/2-inch stock to cover each cylinder
bank of the block (Fig. 7). The plate(s) will adequately seal the top surface of the block when used with cylinder
liner compression gaskets and water hole seal rings. It will also be
60
