Where can I buy a seal for the crankshaft of an air conditioning compressor for my 58 Imperial.Is there a mail order available .What is FREEZE 12 as quoted in a post last week re 134a etc.HOPPY ----- Original Message ----- From: "Mark McDonald" <tomswift@xxxxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, April 28, 2003 5:03 PM Subject: IML: Oil Pressure & Clicking Noise > Reading the recent posts about oil pressure problems and a clicking > noise got me to wondering . . . how do you know when it's a valve > clicking, and not something else? > > I have had small exhaust leaks on almost all my Chryslers. And to me, > they sound like "clicking" or "ticking." Most recently, I had an > exhaust leak on my '70 New Yorker that some folks SWORE was a bad > valve. My uncle, who has many more years experience than I working on > cars, told me I was flat wrong when I said it was an exhaust leak. > > Fortunately, I have heard enough small exhaust leaks to recognize the > sound, and I was right on that one (wish I'd bet him some money). But > I'm not sure if I've ever heard a bad valve. How can you tell the > difference? Someone told me you could listen at the tailpipe, not at > the engine, and if you could hear the ticking back there it was a > valve. Hmm. Or was that the other way around? > > Anyway, just how do you know what that clicking is you're hearing?? > > MM > > >