2. Clean water side of Core - After cle-
Remove Lubricating Oil Cooler
aning oil side of core, immerse it in the
following solution:
1. Drain the cooling system by opening
add one-half (1/2)
pound of oxalic acid to each two and
one-half (2 1/2) gallons of solution com-
posed of one-third (1/3) muriatic acid
and two-thirds (2/3) water. The clean-
ing action is evidenced by bubbling and
that attach the water inlet connector to
foaming.
The process must be carefully
t h e oil cooler housing.
watched and, when bubbling stops (this
usually takes from 30 to 60 seconds), the
core should be removed from the cleaning
3. Loosen the clamp on the water pump
solution and thoroughly flushed with cle-
i n l e t seal.
After cleaning, dip the
an hot water.
core in light oil.
4. Remove the bolts attaching the oil
cooler housing to the adaptor, and re-
move the housing and core as an assem-
NOTE
Be careful when withdrawing the
bly.
Do not attempt to clean an oil cool-
assembly not to drop or damage the oil
er core when an engine failure oc-
cooler core.
curs in which metal particles from
worn or broken parts are released
5. Remove all traces of gasket material
In this
from the oil cooler components.
replacement of the oil
instance,
cooler
c o r e is s t r o n g l y
recom-
6. If the core openings are not marked
mended.
IN and OUT, mark the openings.
7. If the adaptor is to be removed, re-
move the bolts that hold the adaptor to
P r e s s u r e Check Oil Cooler `Core
the cylinder block and remove the adapt-
or and gaskets.
1. Make a suitable plate and attach it to
the flanged side of the oil cooler core.
8. Clean the oil cooler core as outlined
Use a gasket made from rubber to ensure
under "Clean Oil Cooler Core."
a tight seal.
Drill and tap the plate to
permit an air hose fitting to be attached
9. Pressure check the oil cooler core as
side
of
the
oil
core
at
the
inlet
outlined under "Pressure Check Oil Cool-
er Core."
C l e a n Oil Cooler Core
1. Clean Oil Side of Core - Circulate a
solution of trichloroethylene through the
core passages with a force pump to re-
move carbon and sludge.
This operation should be done in
the open or in a well ventilated
room w h e n t r i c h l o r o e t h y l e n e o r
o t h e r toxic chemicals are used for
cleaning.
Prepared for Pressure Check
2. Attach an air hose and apply 75-150
sludge
Clean
the
core
before
the
psi (517-1 034 kPa) air pressure. Then,
hardens.
If the oil passages are badly
submerge the oil cooler core and plate
circulate an Oakite or alkaline
clogged,
a s s e m b l y in a t a n k o f h e a t e d w a t e r
solution through the core and flush thor-
(180F or 82C). Any leaks will be indi-
oughly with clean hot water.
cated by air bubbles in the water.