Using a normal leak detector you can charge system and let sit for an hour, place detector probe near drain for evap, since Freon is heavier than air the sensor will go off.
Other methods used are to place sensor in center vent and turn fan on low. This in my experiences often gives false positive readings. Also I thought I heard that the 300D and 90's W126/W124 had evaporator leaks, I am sure others here can confirm this. Trampas -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Allan Streib Sent: Wednesday, January 10, 2007 11:15 AM To: Mercedes Discussion List Subject: Re: [MBZ] Vergasser vs. Diesel, was 87 TD for sale "Trampas" <[EMAIL PROTECTED]> writes: > The most common AC leak is the expansion valve, second in my opinion > is the charging ports, then front compressor seals and finally > evaporator. Some late models had lots of evaporator problems. My W123 300D will not hold an AC charge. Leaks down in less than a week. My mechanic put a dye in the system and could not locate the leak. He said he checked the expansion valve (it's behind the glovebox, right?) The only thing he could not get at was the evap. It was convereted to R134 by a prior owner. Does that sound like the evap is the problem, then, or could it be the expansion valve but for some reason the dye did not appear there? Allan -- 1983 300D 1966 230 _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
