It really depends. A lot of the issues with slow leaks revolve around the original hoses, which become porous as they age. Since they’re not barrier style hoses which are used now, refrigerant leaks out of them at the molecular level. You can have a tight system, but if your hoses are original, it will leak down over time.
The leak sealer I have used in systems like these is wicked awesome stuff, and short of a leak like a shaft seal, which nothing short of replacement can fix, it does a great job sealing the leaks or at least slowing them down significantly. I have a 1997 SL500 that's never had the system touched in the seven years I’ve owned it and it still makes ice cubes like the day I bought it. The driver of the car wouldn’t tolerate anything less, either. -D > On Apr 25, 2020, at 3:03 PM, Allan Streib via Mercedes > <mercedes@okiebenz.com> wrote: > > I was being a little sarcastic in my question. In my experience any > "original" A/C system much more than about 10 years old will have > significant leaks. My W123 A/C leaks out in about a week after a charge, > and a good local MB indy here narrowed it down to the evaporator. My '04 > Nissan won't hold a charge as of last summer. My long departed A2 Jetta > gave it up after about 7 years. The '06 Honda is still OK knock on wood. > > Almost any 10+ year old car I see advertised at a price I'd consider > interesting has the standard "AC needs a charge" line and we all know > what that really means. > > Allan > > > Dan Penoff via Mercedes <mercedes@okiebenz.com> writes: > >> The ones that were affected by the dissimilar metals cracks were the all >> W124 and some W140 (up to 1995), possibly the early R129s, I’m not sure >> about them. Anything else should be OK. >> >> -D >> >>> On Apr 25, 2020, at 2:24 PM, Allan Streib via Mercedes >>> <mercedes@okiebenz.com> wrote: >>> >>> Dan Penoff via Mercedes <mercedes@okiebenz.com> writes: >>> >>>> I would me more concerend about the AC, since this is a model that is >>>> known for the failing evaporator that is a 22-25 hour job to R&R. >>> >>> Which models are not known for failing evaporators? >>> >>> Allan >>> >>> _______________________________________ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > -- > Allan Streib > Indiana University > Luddy School of Informatics, Computing, and Engineering > Digital Science Center | Intelligent Systems Engineering | FutureSystems > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
