REPAIR INSTRUCTIONS, PART 1
Page 189
Do not use a solvent solution that has been used
for general parts cleaning.
1. Place the cooler in the parts washer and fill it
with Dyna 143, or equivalent, cleaning
solvent. Let the cooler soak for one hour.
246
Figure 246 — Steam Cleaning the EGR Cooler
2. Hang the cooler and steam clean through
the inlet end first.
Steam is extremely hot. Proceed with caution.
Failure to heed this warning may result in
severe personal injury.
Do NOT let the steam and air nozzles touch the
EGR fins during cleaning. Failure to heed this
caution may result in severe component damage.
3. Steam and soot should flow out of the lower
end of the cooler.
4. Turn the cooler end for end and steam clean
through the outlet end until clear water flows.
Set shop air pressure at 172 kPa (25 psi).
5. While the cooler hangs vertically, blow clean
shop air into the inlet end until the cooler is
dry.
247
Figure 247 — Blowing Shop Air into EGR Cooler
6. Turn the cooler end for end and, while it
hangs so that water flows out, blow clean
shop air into the outlet end until the cooler is
dry.
7. Visually inspect the exhaust passages. If
any soot or carbon remains in the cooler,
reclean as needed.
8. When the cooler is dry (clear of water and
cleaning solution), assemble it on the
engine.
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