Keith Browning Posted October 18, 2016 Share Posted October 18, 2016 Well it looks like Hell has has indeed frozen over. I walked out into our lot today to pull a 2017 F450 cab and chassis in to PDI and my jaw hit the pavement! Lookie - a plastic aft-axle fuel tank. Only about 10 years late... Quote Link to comment Share on other sites More sharing options...
RyanG Posted October 18, 2016 Share Posted October 18, 2016 Better late than never Quote Link to comment Share on other sites More sharing options...
Fredsvt Posted October 18, 2016 Share Posted October 18, 2016 Keith, is that tank module plastic and held in with a steel retaining ring? If it is, I see a big problem coming. GM has been using that setup (a dished location and lock ring) for quite some time on their midship and aft-axle tanks. We're now replacing both at a rather frequent pace. If it's a plow or utility truck, it's about every 2-3 years with 5 years max on regular trucks. A salt spreading truck, yearly, if not every 6 months. The ring rots, as do the steel fingers on the tanks. The rust swells up, breaks the plastic causing evap leaks on gas trucks and water intrusion on both. GM uses steel topped modules on some aft axle tanks, they rust through and the springs push the entire module up and out the top of the tank. Just completed a 2011 2500 GMC pickup midship tank, just about $1400 out the door. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted October 19, 2016 Author Share Posted October 19, 2016 Hopefully that is a GM thing. I have not seen them rot on a Ford or a Dodge for that matter. Quote Link to comment Share on other sites More sharing options...
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