Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max
________________________________ From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the "need" to order something else; nothing else came up; even said to Rusty, "Now that I've called to order, something else will likely come up in a day or two." Well, sho nuff. Wilton _______________________________________ http://www.okiebenz.com <http://www.okiebenz.com/> For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
