[Chris Burkard]

Dave,

Cummins uses white paint which is awesome because you can see leaks and any little things going on. Can you imagine black engines? you could not see a thing! The draw back to white paint is it will show everything especially around the exhaust and turbos. The darker colors also discolor around the exhaust and turbos, but due to the darker colors, it doesn't stick out

Heat exchangers, after coolers, fuel and oil coolers should be pulled, cleaned and reinstalled every 3 to 4 years. During the cleaning process, the paint is damaged and requires touch up. It is completely normal.

Any raw water leaks can cause corrosion, which will need to be wire brushed and repainted. Raw water leaks are not uncommon, but they should be repaired immediately. If allowed to go, corrosion will be rampant.

Touch up paint is fine, as long as it is not used to cover up an improper repair.

Good Luck!