Note the melted O ring and general   Here you can see how corrosion leaked past the edge of the O ring, This   Above is a high quality gear cooler, and below the stock version   This Aluminim finned aftercooler never was serviced, purchased in 2005 it spent over 6 years in the water   more evidence of leakage into the aftercooler   Even though the customer tried to clean the aftercooler the damage was done.

This aftercooler was taken from a vessel that had a grand total of 180 hours on the engine over 10 years

Corrosion was left unchecked for several years, salt water still in aftercooler

You can see just how violently the two metals react even while static

This could have been prevented with BASIC maintnance

Even simply flushing out the system with fresh water after each run could have prevented this.

Beneath all this corrosion the an O-ring emerges

Even were the vessel to run, you can see just how completely blocked by corrosion this aftercooler is

Above you can see how the O-ring MELTED over time, fused to both the edge of the aftercooler and cap

  12 years, 500 hours operation, no maintnance

  ↑ Looking for your impeller? ↑

Corrosion isn’t pretty, neither is the bill when simple maintenance can save the day.

Your language may be a bit salty but that is the LAST thing you want for your aftercooler

Proper maintenance ensures your aftercooler doesn’t have to be a bit of extra mussel work.

Corrosion from seawater does not meet with our seal of approval, check those seals

Sacrificial zinc and impeller bits make your aftercooler work that much harder

The above zinc and impeller from a different angle.

 Oil leakage from a turbo condensed to the fins of the aftercooler.

Looking for your air filter?

 A destroyed aftercooler housing from lack of proper assembly resulting in O-ring leakage.

This could have easily been prevented.

Found that air filter!

Our aftercoolers may be good, but really? Salt and zinc cut the efficiency down to a quarter.

Under pressure you can see that two or three of the tubes have been compromised by corrosion

The buildup of corrosion internally put undue stress on the housing, throw in engine vibration for this result.

Again, corrosion between brass and aluminum are not all they’re cracked up to be.

Simple leakage of water past the aftercooler seal.

Where did my paper hand towel go t-

you should know the answer by now.

Peeled away we can see that the towel had been there for some time.

Zinc and corrosion gum up the aftercooler.

Again the expansion of corrosion crack a housing, less drastically in this case.

 Corrosion from unchecked use.

On the left is the normal state of the housing, the right shows the effect of corrosion.

   Looking for your impeller?

Oil mist and condensation form over time to add yuck and guck your once pretty aftercooler

These bent tubes show the result of an improperly installed zinc bouncing about the underside of the aftercooler.

More yuck and guck and oil mist turn into baby poop on your aftercooler.

A more advanced stage of corrosion, especially on the aluminum finned aftercoolers.

 Corrosion and salt across the fins reduces the area contacting air, thus re