Cummins Marine QSB 6.7 Aftercooler Maintenance

In this video we run through the maintenance of an Aftercooler from a QSB 6.7 HO 550. This is the older Pre-Mota style aftercooler but the same approach can be used on Mota and other aftercoolers.

[@jooliohoolio]

Thank you - amazing video! Would be great to see the video on how to pull apart an intercooler core from it's housing that hasn't been looked after like this! Just bought a boat with this very problem! 2 x Cummins qsb...

[@SeaboardMarineIncVideos]

We are working on that. Its a little tough because when we have an aftercooler in bad shape the customer usually wants it back yesterday, so its hard to find time to make the video, but we are definitely working on it.

[@jooliohoolio]

😂 yes, don't you know it! We just bought a new core from you having managed to finally get the old one out - thanks for the amazing service by the way! Paid for Friday, shipped to Mallorca and received today!

[@jonathantibbs2659]

Agree 100% with your method and fresh water flush benefits. The best educational marine service video! I use similar practices on other marine work too. Alco grease all the way.

[@SeaboardMarineIncVideos]

Thanks!

[@bnkwupt]

Glad my 210s don’t have aftercoolers. Thanks for the video!

[@billfletcher5495]

Good video, TY

[@arthurcitron9774]

Spot on!👊🏻🇺🇸

[@larryjohnson5597]

No pressure test why?

[@wallacejeffery5786]

Need more details

[@deeremeyer1749]

Uh...the "fresh water flush" would be MAINTENANCE. And if it was in the "owners manual" for a "DIYer" this would be SERVICE. What it actually is is a "repair".

[@deeremeyer1749]

WD-40 loosens "salt deposits"? WD-40 is almost 100% plain old kerosene. Let's see the "fresh water flush" and a video of the boat in "normal operation". Its entirely possible that "aftercooler" is running "dry" the "not many hours" it ran in "3 years in the ocean". And you don't need to change zincs in "fresh water"? Even "fresh water" is "salt water" to some extent especially natural lakes.