gc_caddy Posted February 15, 2006 Report Share Posted February 15, 2006 I just replaced my radiator which had cracks in the end tank. The transmission oil line, at the fitting, now has a slight leak. I tightened it up with a bit more torque (used a flare nut wrench), it helped at stopping the leak at idle, but after a test drive I noticed it still leaking. The connection is a compression fit (no o-rings). Should I just torque it down some more? I'm now sure how much force I can use, or if it's even fruitful. The FSM says 20 lb ft (but it's kind of hard to judge because I can't use my torque wrench). If I damage the fitting by adding more torque, is my alternative to bypass the end tank cooler entirely? I think my 94 STS has an auxiliary cooler. Link to comment Share on other sites More sharing options...
MAC Posted February 15, 2006 Report Share Posted February 15, 2006 Did you try to reset the connection by taking the line off and putting it back on? I just replaced my radiator and didn't have a problem with the transaxle line. Is it leaking from the threads and/or in between the nut and line? How about trying an adhesive sealant. Link to comment Share on other sites More sharing options...
stsjoe Posted February 15, 2006 Report Share Posted February 15, 2006 Are you sure it didn't have O rings? My 96 did and I didn't see them till I put the new radiator in and saw them laying down in the cradle.They fell out when I removed the lines and I didn't see 'em (Got lucky on that one!) Joe Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 15, 2006 Report Share Posted February 15, 2006 I didn't have o-rings on my cooler line connections at the radiator on my 96, but my 91 did. Its possible that the flare is not fully seated, back the nut out and make sure the flare fitting is going straight in to the radiator and then tighten the nut. I see no reason why that joint should leak if the flare is in all the way, Mike Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
gc_caddy Posted February 15, 2006 Author Report Share Posted February 15, 2006 Thanks for the help, guys. This morning I applied a bit more torque to the fittings and after driving into work, there were no more leaks. Of course, I haven't tried WOT, but I'll do that later tonight. Changing the radiator is a bit more work than the FSM would indicate. Cramped spaces, clean up, etc. It's not brain surgery, just grunt work. Link to comment Share on other sites More sharing options...
jamesg Posted February 21, 2006 Report Share Posted February 21, 2006 Thanks for the help, guys. This morning I applied a bit more torque to the fittings and after driving into work, there were no more leaks. Of course, I haven't tried WOT, but I'll do that later tonight. Changing the radiator is a bit more work than the FSM would indicate. Cramped spaces, clean up, etc. It's not brain surgery, just grunt work. Link to comment Share on other sites More sharing options...
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