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Old 06-22-2005, 02:27 PM   #1
denissef
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Exclamation Probable air conditioning system problem

It started days ago, whenever I put the brakes to stop, this vibrating sound scared me and it only dissapeared when I took my foot off the brake, although sometimes it faded while I was at the red light. I think it is something related to the air conditioning system because I have tried going without the AC on and I have not had that problem again. What could it be?

The air conditionier cools well though, I have not had problems with that... yet...

Any thoughts, or suggestions?
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Old 06-27-2005, 02:15 PM   #2
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does the sound/vibration occur once you've come to a complete stop? do you feel the vibration in your foot when you're braking?
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1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray

acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts




2002 X5 4.4 Sport Package, 53.5k miles
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Old 06-27-2005, 02:27 PM   #3
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Quote:
Originally Posted by denissef
It started days ago, whenever I put the brakes to stop, this vibrating sound scared me and it only dissapeared when I took my foot off the brake, although sometimes it faded while I was at the red light. I think it is something related to the air conditioning system because I have tried going without the AC on and I have not had that problem again. What could it be?

The air conditionier cools well though, I have not had problems with that... yet...

Any thoughts, or suggestions?
Weird one. Does it sound like a groaring sound?

http://www.318ti.org/tsbs/groaring.html
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Old 06-27-2005, 05:10 PM   #4
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Could just be slightly low on coolant causing the compressor to cycle on/off. EZ thing to check.
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Old 06-27-2005, 05:25 PM   #5
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Quote:
Originally Posted by cali-ti
does the sound/vibration occur once you've come to a complete stop? do you feel the vibration in your foot when you're braking?
Yes... Whenever I have to stop at a red light, it happens and of course it only happens when I have my AC on. I can say that I can feel some vibration on my foot, yeah but also it's like it is coming from the front of the car (where the engine is).
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Old 06-27-2005, 05:26 PM   #6
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Originally Posted by 96cali
Could just be slightly low on coolant causing the compressor to cycle on/off. EZ thing to check.
The coolant.... how can you check that? I mean can I do it myself? I would surely do it myself if there's a way.
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Old 06-27-2005, 05:29 PM   #7
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Originally Posted by 1996 328ti
Weird one. Does it sound like a groaring sound?

http://www.318ti.org/tsbs/groaring.html
Hmm, this is interesting, yeah it produces a sound like that... It scared me the first time LOL!
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Old 06-28-2005, 01:14 AM   #8
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Quote:
Originally Posted by denissef
Hmm, this is interesting, yeah it produces a sound like that... It scared me the first time LOL!
I heard this in 99 in Florida in my 98 ti. It was VERY hot inside the car. I started it up and cranked the A/C. It sounded like a lion's roar. At the time it was fixed under warranty.
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Old 06-28-2005, 03:28 AM   #9
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odd ... what did they replace?
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1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray

acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts




2002 X5 4.4 Sport Package, 53.5k miles
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Old 06-28-2005, 04:21 AM   #10
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Originally Posted by cali-ti
odd ... what did they replace?
what do you mean?
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Old 06-28-2005, 04:23 AM   #11
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Quote:
Originally Posted by denissef
what do you mean?
sorry, that question was for steven sounds like he had a similar problem that was fixed under warranty and i'm wondering what part they replaced to fix it (as it might be the same problem part on yours).
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1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray

acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts




2002 X5 4.4 Sport Package, 53.5k miles
Current Mods: e46 m3 steering wheel
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Old 06-28-2005, 04:28 AM   #12
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Quote:
Originally Posted by cali-ti
odd ... what did they replace?
Expansion valve or something to do with the evaporation unit. It was a common problem several years ago. Many of us experienced it.
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Old 06-28-2005, 02:30 PM   #13
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Quote:
Originally Posted by 1996 328ti
I heard this in 99 in Florida in my 98 ti. It was VERY hot inside the car. I started it up and cranked the A/C. It sounded like a lion's roar. At the time it was fixed under warranty.
Well... My car doesn't sound like a lion's groar literally but i have noticed that the thing/noise or whatever get stronger whenever I have my AC in higher settings. When I have it in the lowest setting it happens but not as strong as.
Today I was driving with AC on and stopped a couple of times, then the vibration happened and while it was happening I turned the AC off immediately and the sound/vibration stopped instantly.
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Old 06-28-2005, 02:33 PM   #14
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Quote:
Originally Posted by cali-ti
sorry, that question was for steven sounds like he had a similar problem that was fixed under warranty and i'm wondering what part they replaced to fix it (as it might be the same problem part on yours).
Oh.. ok, I thought I was missing something
Who knows, I am going to do some research on that, to understand what's the connection with ,my problem...
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Old 06-28-2005, 02:34 PM   #15
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so perhaps it's related to blower speed? but with the AC off and just the blower on it doesn't do it?
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1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray

acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts




2002 X5 4.4 Sport Package, 53.5k miles
Current Mods: e46 m3 steering wheel
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