4-43. INTAKE MANIFOLD ASSEMBLY.
a. Test. On Equipment (see figure 4-36). On ASK equipped
generators, remove right panel assembly (para. 5-6). Remove
hose between intake manifold and air cleaner to permit visual
inspection of heater coils (23). Place master switch (see figure
2-3) in the PREHEAT position. Good coils should start to heat
within one minute. Release switch as soon as coil begins to heat.
Replace a bad heater.
b . I n s p e c t h e a t e r f o r p h y s i c a l d a m a g e .
Check that electrical connections to heater are clean
and tight. While engine is operating, check for leaks
especially at the gasket (21, figure 4-36) between
manifold and cylinder head and the gasket (30) between
the manifold heater adapter (29) and the manifold.
Drop oil from an oil can or hold piece of thin paper
on point suspected of leaking. If leak exists, oil will
be sucked in or paper will be sucked against leaking
c. Remove. Tag and disconnect leads (22 and 24)
from heaters (23) and remove heaters (23). Remove
leads (24) by removing screw (25), washers (26 and
27) and spacer (28). Remove adapter (29) and gasket
Figure 4-38. Rocker Arm Covers