Originally Posted by
trbankii
I’m not sure I’d spray them with oil, that would just make it harder to see if they are leaking somewhere.
On my ’93 I ended up having to do it out in the driveway (another vehicle with no axles in the workshop). I dropped the tank from underneath the truck. Hindsight, it would have been a helluva lot easier to raise/remove the bed. Also, on the ’93 the fuel lines run up alongside the transmission and up over the bellhousing to the back of the engine. Raising the cab (or pulling the trans) would have made things a lot easier. Even with a floor jack, unbolting the cab/bed, jacking things up a bit, and slipping 4x4s under for support could give you some room to work without getting too crazy.
Regular flushing keeps them from corroding from the inside out. But the salt and other crap they put on the roads around here rusted mine from the outside in.
Thanks for the info, I'm going to flush again in the spring / end of winter. May do sooner if the weather stays / gets nice.
We do use salt here, I was hoping that a bit of oil would keep the lines clean enough for another couple of years. I guess if I flush, check the state of the fluid and then flush again in 6 months that'll tell me how they look on the inside.
GMC Sierra 2500hd 2004.5 now with ARP studs