remoteQ

Thanks, ABear, for stopping by Not too sure about the corrosion theory, as scraping these deposits away from metal surfaces with a fingernail generally reveals clean plating underneath(!) No appreciable rust on the bare steel bits, either. Overall, it really does remind me of hard water deposits in old pipes... I've attached the best pic I could get of an in-tank specimen (note the queer amber crystals on the ID).

A good reference for compressor oil capacities is here: https://cooldrive.co.nz/catalogues/cooldrive-auto-parts-air-conditioning-condensers-evaporators-catalogue Page #639 has info on the A6. System capacities are provided @ Four Seasons in their publication, here: https://www.4s.com/media/3656/four-seasons-capacity-guide.pdf Hope these offer some help specwise

+1 more on the hoses: As I recall, some have liners which can dislodge over time and plug the ID solid.

Greetings! First post, and glad to be here As background, I'm working on an old(ish) Volvo which is coming out of long-term storage; and have a quick general question for the community today. I think some folks might relate to this particular issue... While attending to the car's fuel system prior to startup, I noticed a crystalline accumulation on the dry metallic in-tank componentry and the inner aspects of the car's fuel line runs. As reference, the substance in question has the appearance of white-to-tan hard water deposits (it's crusty, not rusty -- and there's no sludge ). So, since the crystalline deposits themselves seem to have come from evaporated fuel, is just refilling the lines with fresh fuel as a soak sufficient to bring this material into solution without further issue? Or, is there a cleaner of some sort which the lines should be filled with as a dissolving soak prior to initial startup? Any ideas/experiences to share? Thank you for the input, and have a great day.