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My FG had a recall to replace the rocker arms. When I had it done they found a broken exhaust rocker arm and a damaged valve. This of course required pulling the head and took some effort and time to complete. I don’t know when it broke since there was no additional noise and seemed to drive OK...

Apparently FUSO in 2017 started using an electrically operated engine fan in place of a viscous fan. My dealer said it was to reduce engine load and increase milage. This may be a good idea except my fan engages much to much. On a recent trip it would engage for 20 to 40 sec. every 1 1/2 to 2...