Page 354
REPAIR INSTRUCTIONS, PART 1
When replacement is required, always replace
thermostats in pairs. Always install a new seal in
each housing bore and place the thermostats in
position in the housing bores with the valve spring
up. Check to see that the bores are free from any
contaminants such as chips, grit, dust or any
other debris that would damage the barrel seals
or prevent the thermostat from seating properly
when it is fully closed.
2. If required, install a new thermostat barrel
seal in each of the thermostat chambers
using the following procedure:
a. Use crocus cloth to remove any surface
nicks, burrs, sharp edges and tool
marks from the thermostat sleeve and
housing bore area.
421
Figure 421 — Thermostat Housing
b. Check to see that replacement barrel
seals are free from any contaminants
such as chips, grit, dust or any other
debris that would prevent the seal from
properly seating in the thermostat
housing bore.
c. Press the barrel seal into the housing
bore by applying smooth, uniform
pressure with a press fitting tool. Press
fitting tools are available through the
Kent-Moore tool company.
d. A complete set of installation tools
includes thermostat seal installers
(J 26637-A) and (J 26638-B) and a
driver handle (J 8092). Use Kent-Moore
tools, or equivalent, for this procedure.
422
Figure 422 — Thermostat Barrel Seal Installation Tool
e. Always use the proper seal installer. Do
not use a hammer or apply uneven
pressure directly to seal surfaces.
Precautions should be taken against
cocking of the seal throughout the
installation operation. Make sure that
when the seal is in the final position, it
is not cocked.
3. Ensure the thermostat flange seal is in
proper position on each thermostat (seal is
an integral part of the thermostat) and place
the thermostats in position in the housing
bores with the valve spring up (Figure 423).
Make sure that the thermostat flange seals
are properly seated in the thermostat
housing bore.
1. Barrel Seal Bore 2. Thermostat Housing
5-111.bk Page 354 Monday, July 10, 2006 2:26 PM
To Next Page
Loading...
