GordonZoo Posted September 14, 2018 Share Posted September 14, 2018 Of late, We have been undercoating our newer vehicles as the salts in the north were eating the frame to pieces. I had read there is a lot of aluminum in the new Nav. Has anyone decided to do an undercoating on theirs? There is a place in NH that has a one and done black tar type of undercoating that looks good but I'm not sure if these Navigators have the same rust issues of past. My 2007-1/2 F-150 damn near broke in half in 8 yrs. I plan to keep this one over 10 yrs. Rich Quote Link to comment Share on other sites More sharing options...
ice-capades Posted September 15, 2018 Share Posted September 15, 2018 There is no need to undercoat new vehicles and doing so may cause more problems by sealing drainage points and trapping water, etc. Quote Link to comment Share on other sites More sharing options...
GordonZoo Posted September 15, 2018 Author Share Posted September 15, 2018 Thanks for the feedback. It would save me two trips, car rental and $850. So nothing under the new Nav will rust. Are the brake lines stainless? Is there any place I could read up on what's different now that prevents rust like Galvanization or more Aluminum in the frame? I know of late Ford is using a lot more aluminum for weight but even my last Nav had a creeping rust between the paint and the aluminum back hatch. But underneath is my main concern. I lost my dodge ram and ford F-150 due to salts and I always spray off when possible. Shame on me for getting fooled the third time. Quote Link to comment Share on other sites More sharing options...
ute Posted September 15, 2018 Share Posted September 15, 2018 Use Krown oil spray ...they have been trained on how to work on aluminum Ford vehicles Quote Link to comment Share on other sites More sharing options...
GordonZoo Posted September 15, 2018 Author Share Posted September 15, 2018 Looks like Krown oil a yearly application? From videos, I looks like it does the job though and it's initial cost are a cheep alternative to my previous vehicle treatments. However, I'd rather not undercoat at all if the Nav is all aluminum and stainless lines underneath and totally immune to rust. I really didn't get an answer at the dealership. They just wanted a sale. It would be great to understand if this new Nav has totally addressed all material changes regarding longevity. Thanks for all your inputs. Rich Quote Link to comment Share on other sites More sharing options...
ute Posted September 16, 2018 Share Posted September 16, 2018 Yes yearly ..but they do so much more than just the body and frame ...all electrical connection and general lube protection of everything Quote Link to comment Share on other sites More sharing options...
GordonZoo Posted September 16, 2018 Author Share Posted September 16, 2018 I just checked the closest Krown location and I would have a 2.5hr drive each way to the closest. The good news is it's not an overnight application. Application cost is $150 yearly. If it were closer, that would be the way to go. Quote Link to comment Share on other sites More sharing options...
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