Remove, Inspect and Clean Engine
Aftercooler Core (6068SFM50)

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Remove Clamp And Air Filter Element

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Remove Rear Cap

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Remove Front Cap

A - Clamp

B - Clamps

C - Mounting Bolt

D - Cap Screws

E - Clamps

F - Cap Screws

IMPORTANT: Initially remove and inspect the aftercooler core at 250 hour or three month service interval on a new engine. Then, remove and clean at every 500 hour or 12 month interval thereafter.

IMPORTANT: Ensure Service Kit RE18060 is readily available before removing aftercooler core. Air side seals will be destroyed during core removal, and RE18060 kit includes required replacement seals, as well as end cap O-rings.

1. Close sea cocks and drain the sea water system.

2. Loosen clamp (A) and remove air filter.

3. Loosen clamps (B), remove mounting bolt (C) and remove water line from rear of aftercooler.

4. Remove four cap screws (D) and remove rear cap and O-ring.

5. Remove clamps (E) and remove hoses from front cap.

6. Remove four cap screws (F), front cap and O-ring.

7. Remove aftercooler core from the rear of the engine.

8.

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Clean Aftercooler Core

9. Use a 4.76 mm (3/16 in.) diameter brass rod to clean out any buildup in each tube. Run the rod the entire length of each tube to push debris out.

10. Flush the tubes with clean water, making sure all tubes are cleared of debris. Clean (with brass rod) and flush aftercooler core again if necessary to remove any remaining debris from tubes.

If you suspect that your aftercooler core is defective, have your authorized servicing dealer or engine distributor pressure test for leaks. Replace aftercooler core as required.