FSchuett Posted July 16, 2010 Report Share Posted July 16, 2010 Hello, I´ve a problem with my ´95 Eldorado TC. I think after a brake pad change (rotors are new at the last winter), is´t a howling sound from 40 mls/h till 70 mls/h. Now, we have change these pad a second one, clean all brake parts and install a new bearing hub. We think it´s these right bearing.... Nothing.... Now, I think, if the car are hot, the sound is quiter thank the cold car and the sound are not quiter or noisier if I drive curves. I think its the axle, because its the only part which we not change. Anyone an idea ?? Thanks for all... Frank PS: At the brake pad change we install a new oil cooler with lines and remove/install the plastic radiator cover... Can these cover or another plastic/metal cover viberate an make these howling sound ? Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 16, 2010 Report Share Posted July 16, 2010 Are you positive its the brakes? Have you checked all of the accessories? Alternator bearing, AC hub, idler pulley, tensioner pulley, etc Also check the backing plate at the wheel, I have seen them bent, and create noise, but I dont think it would be speed related 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...
FSchuett Posted July 16, 2010 Author Report Share Posted July 16, 2010 Hello, I´m not shure if is the brakes, but the sound was after the brakepad and oilcooler installation. The sound is at 40 mls/h (deeper) till 70 mls/h (higher) at any rpm... The Alternator bearing, AC hub, idler pulley, tensioner pulley are my meaning rpm depending. If I drive 60 mls/h (for example) the sound is the same in D or N position (with difference rpm). Frank Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 16, 2010 Report Share Posted July 16, 2010 If I get you right, RPMs changes the sound, correct? Then if that is the case, I doubt its the brakes Id look at accessories, maybe they removed the alternator to get at the oil cooler and didnt tighten up the area 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...
FSchuett Posted July 16, 2010 Author Report Share Posted July 16, 2010 Excuse me, my english is not so good... The howling sound is in the right front end. It is from 40 mls/h till 70 mls/h. If I drive 60 mls/h (with howling sound) and I shift from "D" to "N", the engine runing idle and the sound is the same. It comes not from the engine, because the sound are not different after idle change. In curves is the sound the same at this speed. We makes the following works: - Front brake pads - Brake fluid with bleeding - Right bearing hub - Oil cooler - Oil cooler lines I don´t know what it is, because it´s after the brake pad change. The problem is the long delivery time from the parts to germany and that is the reason why I order a new right front axle. Any other idea ? Frank Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 17, 2010 Report Share Posted July 17, 2010 Hmmm, so they replaced the axle? I hope that they did not dislodge the inner CV joint in the process 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...
Texas Jim Posted July 17, 2010 Report Share Posted July 17, 2010 Om my first 2006 DTS...I had a strange sound that started at about 60/70 mph. It sounded almost like air horns on a big truck...just not as loud. The sound would vary with speed but not with RPM. It turned out to be the rubber strip on the bottom of the hood that seals across the top of the radiator vibrating against the top of the radiator. Dealer replaced the rubber strip and I never had any more problem like that. One other thing I would check and DOUBLE CHECK.... Look at the brake backing plates on the inside of the rotors. Make "SURE" that they are not touching anything. I have seen brake backing plates do exactly what you are talking about. Good luck and keep us informed of what is going on... Link to comment Share on other sites More sharing options...
Texas Jim Posted July 17, 2010 Report Share Posted July 17, 2010 Hmmm, so they replaced the axle? I hope that they did not dislodge the inner CV joint in the process Mike, The way I read it...he "HAS NOT" replaced the axle...yet. He has ordered an axle...but does not yet have it in hand. Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 17, 2010 Report Share Posted July 17, 2010 Good catch Jim, but he did replace the hub bearing, hopefully the CV joint was not dislodged when that was done. I see your brake backing plate suggestion, I suggested that also above, maybe the wind is pushing it toward the rotor at a certain speed? The backing plate is part of the hub bearing job, its held by the hub bearing bolts...if I recall 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...
Texas Jim Posted July 17, 2010 Report Share Posted July 17, 2010 Good catch Jim, but he did replace the hub bearing, hopefully the CV joint was not dislodged when that was done. I see your brake backing plate suggestion, I suggested that also above, maybe the wind is pushing it toward the rotor at a certain speed? The backing plate is part of the hub bearing job, its held by the hub bearing bolts...if I recall Yep...that's what I was thinking... It would be fairly easy to not have it positioned correctly. Link to comment Share on other sites More sharing options...
FSchuett Posted July 17, 2010 Author Report Share Posted July 17, 2010 Hello all, we change the hub bearing in a hope it was the sound generator ;-) Nothing, the sound is the same. the next delivery from RockAuto (monday) are axle, brake master cylinder and front brake repair kit. We have change the brake pads and bleed the system because the Eldo´s brakes are very bad. Now after this we hear the sound. Then we find that the master cylinder is damaged. I hope the sound was gone if I clear and grease the brakes at thuesday and install a new master cylinder. Thanks With beste wishes from hot Germamy Frank Link to comment Share on other sites More sharing options...
Texas Jim Posted July 17, 2010 Report Share Posted July 17, 2010 Hello all, we change the hub bearing in a hope it was the sound generator ;-) Nothing, the sound is the same. the next delivery from RockAuto (monday) are axle, brake master cylinder and front brake repair kit. We have change the brake pads and bleed the system because the Eldo´s brakes are very bad. Now after this we hear the sound. Then we find that the master cylinder is damaged. I hope the sound was gone if I clear and grease the brakes at thuesday and install a new master cylinder. Thanks With beste wishes from hot Germamy Frank When you put it back together... Pay special attention to the brake backing plate... And make sure the inner CV joint does not get damaged. Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 17, 2010 Report Share Posted July 17, 2010 Hello all, we change the hub bearing in a hope it was the sound generator ;-) Nothing, the sound is the same. the next delivery from RockAuto (monday) are axle, brake master cylinder and front brake repair kit. We have change the brake pads and bleed the system because the Eldo´s brakes are very bad. Now after this we hear the sound. Then we find that the master cylinder is damaged. I hope the sound was gone if I clear and grease the brakes at thuesday and install a new master cylinder. Thanks With beste wishes from hot Germamy Frank Frank, if you don't have a factory service manual let me know, I will scan some photos for you, 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...
FSchuett Posted July 17, 2010 Author Report Share Posted July 17, 2010 Frank, if you don't have a factory service manual let me know, I will scan some photos for you, Mike Hello Mike, that was very nice, because I´ve an old manual from my ´92 Eldo... Thanks Frank Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 17, 2010 Report Share Posted July 17, 2010 Well if you need anything specific to the 95 let me know, I have a 91, 95 and 96 manual, 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...
FSchuett Posted July 19, 2010 Author Report Share Posted July 19, 2010 Well if you need anything specific to the 95 let me know, I have a 91, 95 and 96 manual, Mike Hello Mikes, if the brake system from my ´95 Eldo the same as the ´92 Eldo ? Than I have the ´92 manual. Is it another system than I need the ´95 manual for the brake and mastercylinder. Thanks Frank Link to comment Share on other sites More sharing options...
BodybyFisher Posted July 19, 2010 Report Share Posted July 19, 2010 When you are ready to do the master cylinder, Ill scan the pages for you and send them to your email address, let me know, send me a PM with your email address 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...
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