Originally Posted by
BrickDriver
Thanks FirstVolvo. Some good info in the thread you referenced - thanks for pointing me to it.
I don't know for sure where the leak is - the dealer says it is the filler neck vent pipe or filler neck above the gas tank, but it may be that the smoke was coming from up over the tank and they may have assumed it was from the filler neck. I may try to get a borescope in there to see if anything obvious can be observed.
When you fill the tank 100%, do you get raw gas leaking out?.....You should be able to see a gunk trail where the leak point starts.
When I got my smoke test at a repair shop, costing $145, they said "top of the tank". I took it back and made them repeat the test, noting that I wanted the leak pin-pointed within a few mms, so I could make a repair without dropping the tank. They let me observe the smoke coming out. It was a micro-crack in a plastic weld, the one where the filler VENT HOSE's hose bib is welded to the tank. It's disappointing that Volvo went to plastic tanks and used plastic welding on it....those welds are a vulnerability.
2013 XC70 T6 Flamenco Red (hers)
2015 XC70 T6 Seashell Metallic (his)
past: 13 Volvos going back to '74 242 sedan
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