In my case at least, the original hoses are just fine. I've been running R134 through them for one decade now without a single leak. My low pressure switch rusted through, and I've lost a couple of compressors to shaft seal leaks, but the rest of the system is original and tight as can be. Anyone who claims that part/all of the system *MUST* be replaced to convert to R134 is just plain wrong. Components *CAN* be replaced, but such replacement is strictly optional (assuming the components aren't damaged to begin with). Bill Robertson #5939 --- In dmcnews@xxxxxxxxxxxxxxx, gmfm1@... wrote: > > You may need to replace your hoses. As they get old they leak the gas right through the hose. I replaced mine a couple of years ago and the AC has been working pretty good since. Got the new ones from John Hervey because you can replace the AC hoses with his without removing the body from the frame. Also, the valves tend to leak at the back of the compressor. Try metal caps with an O ring to seal it shut. (Thanks David) > Gary Masie > ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: dmcnews-digest@xxxxxxxxxxxxxxx dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/