Hearing a "CLUNK" sound - sometimes when turning on the A/C, (SOMETIMES)

Johnold · 04-11-2007, 09:12 PM

Just today I got in my Si and turned and started to get going etc and after about 2 minutes into driving outa my apt complex, I turn on the A/C and i hear a "CLUNK" sound as if the A/C unit WOKE UP and just took a DUMP or something LOL. ofcourse the A/C ran fine and all and everything was ok but I was wondering why it did that in the first place as soon as I turned on the A/C. So far I have NOT had any technical problems with my 07 Si, So I was just wondering if any of you that have an Si or even ANY newer civic has had this happen....? I know that sometimes when a person turns on the A/C for the first time when driving that you can hear the machine turn on and it just sounds awfull sometimes you know?. it still blows nice cooler air and all and everything checks out fine. it rained the day before and all through the night so i'm wondering if for some chance that, that had something to do with it?. it was pretty humid outside so i dunno.

***Zeuceone*** · 04-11-2007, 09:16 PM

its the compressor turning on. its normal.

Johnold · 04-11-2007, 09:24 PM

isn't it weird though?. i mean, it sounded like i ran over road kill going like 70+ MPH. LOL, weird. it's never happend before untill today.

***Zeuceone*** · 04-11-2007, 09:24 PM

you wil get used to it.

BlueSi · 04-11-2007, 09:29 PM

I think the sound he is talking about is more than just the sound of a compressor turning on. Its happened to me as well. I turned on the AC one day and the car jerked forward and I heard a loud clunking sound. I almost crapped myself but hasn't happened for a while.

Johnold · 04-11-2007, 09:33 PM

^ yeah, something like that ^. but i wouldn't say that the car JUMPED forward though. just sounded like the cars turd falling into the gas tank toilet LMAO!.

kero · 04-11-2007, 09:57 PM

The compressors on the new civics are very loud and can be heard at just about any speed when they turn on and off.

Johnold · 04-11-2007, 10:02 PM

oh i see. man, i hope it gets better. eventhough it was just this time doing it.

joedart · 04-11-2007, 10:11 PM

my si did this about 30,000 miles ago, made the car feel like i tapped on the brakes hard and the noise was kinda like "brrrrrrt". it's never done it again though.

joedart · 04-11-2007, 10:18 PM

^^true.

i had this happen to me about 30,000 miles ago. my car went brrrrt and it felt like i tapped the brakes hard. it only happened once.

Johnold · 04-11-2007, 10:21 PM

i thought that i was going to have to take it in. but i don't worry about things THAT much. i figure, it's a new car and it shouldn't be giving me any problems.

i hope to HELL that my 07 and ALL 07 civics don't have to go through a RECALL....EVER!

***fiji06si13*** · 04-11-2007, 10:24 PM

If you don't use the compressor for a while like say for a whole winter...the compressor clutch gets a rusty build up and if you engage it it's not a smooth engagment it will make a wierd noise.......and sometimes may pull a heavy load on engine......think of it like disc brakes after a heavy rain storm and the car sits for a few days after you will see rust on the rotors.....

Johnold · 04-11-2007, 10:27 PM

oh ok yeah, i HATE when it rains cause my NHBP Si looks like shiet!. i have it when the rain splashes the sand and crap from the ground and onto my rotors and brakes and wheels and tires

AHHHH!.

dsg2003gt · 04-12-2007, 10:07 PM

dude holy CRAP! I thought I Was the only one. Mine makes a loud clunk noise just like the one you described. A few times I thought I had hit the curb backing out. Then I figured out it was the AC compressor.

What I noticed is that it only does it if the car sits over 12 hours or so and/or is parked outside. It didnt do it when I parked in my parents garage.

It is very weird I hope it isnt hurting anything.

I am afraid to bring it to honda because they will probably want me to leave it there overnight...and that is a great way to get dents.

***fiji06si13*** · 04-12-2007, 10:11 PM

Quote:

Originally Posted by dsg2003gt

dude holy CRAP! I thought I Was the only one. Mine makes a loud clunk noise just like the one you described. A few times I thought I had hit the curb backing out. Then I figured out it was the AC compressor.

What I noticed is that it only does it if the car sits over 12 hours or so and/or is parked outside. It didnt do it when I parked in my parents garage.

It is very weird I hope it isnt hurting anything.

I am afraid to bring it to honda because they will probably want me to leave it there overnight...and that is a great way to get dents.

the compressor clutch gets a rusty build up from moisture in the air overnight and if you engage it it's not a smooth engagment it will make a wierd noise.......and sometimes may pull a heavy load on engine......and pullit down close to a stall this is normall try engaging it while already going forward or warming up car and use the defrost it will clear out by the time you drive it...

07Sin4Door · 04-12-2007, 10:13 PM

I can honestly say I have never used my ac LOL

dsg2003gt · 04-12-2007, 10:23 PM

I figured it had something to do with the clutch engagement since it would only do it when the AC was turned to on instead of just when it was on vent.

***bbRedSi*** · 04-13-2007, 01:54 AM

i HATE that sound with a passion, sounds harmful but i guess its not....

volvo9 · 04-13-2007, 09:18 AM

You should hear it in my ford... Does that every time.

Can't wait to get rid of this thing for the civic.

Johnold · 04-13-2007, 09:20 AM

yeah i don't think it's harmful but sure sounds NASTY!. it only happen to me that 1 time. i'm hoping that it won't again.

04-11-2007, 09:12 PM	#1 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	Hearing a "CLUNK" sound - sometimes when turning on the A/C, (SOMETIMES) Just today I got in my Si and turned and started to get going etc and after about 2 minutes into driving outa my apt complex, I turn on the A/C and i hear a "CLUNK" sound as if the A/C unit WOKE UP and just took a DUMP or something LOL. ofcourse the A/C ran fine and all and everything was ok but I was wondering why it did that in the first place as soon as I turned on the A/C. So far I have NOT had any technical problems with my 07 Si, So I was just wondering if any of you that have an Si or even ANY newer civic has had this happen....? I know that sometimes when a person turns on the A/C for the first time when driving that you can hear the machine turn on and it just sounds awfull sometimes you know?. it still blows nice cooler air and all and everything checks out fine. it rained the day before and all through the night so i'm wondering if for some chance that, that had something to do with it?. it was pretty humid outside so i dunno.

04-11-2007, 10:24 PM	#12 (permalink)
*fiji06si13* Wannabe Porn Star Join Date: May 2006 Location: Jerz Age: 28 Posts: 9,340 Justin aka Mr. JT iTrader: 3 / 100%	If you don't use the compressor for a while like say for a whole winter...the compressor clutch gets a rusty build up and if you engage it it's not a smooth engagment it will make a wierd noise.......and sometimes may pull a heavy load on engine......think of it like disc brakes after a heavy rain storm and the car sits for a few days after you will see rust on the rotors..... __________________ My car http://www.8thcivic.com/forums/intro...present-2.html Buy My 06 SI Rotors! http://www.8thcivic.com/forums/suspe...ml#post3506393 RIP Bernie Mac RIP Andre Young Jr. http://www.8thcivic.com/forums/water...-young-jr.html Last edited by fiji06si13; 04-11-2007 at 10:29 PM.

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04-11-2007, 09:24 PM	#3 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	isn't it weird though?. i mean, it sounded like i ran over road kill going like 70+ MPH. LOL, weird. it's never happend before untill today.

04-11-2007, 09:29 PM	#5 (permalink)
BlueSi Senior Member Join Date: Apr 2006 Location: NOVA Posts: 161 iTrader: 0 / 0%	I think the sound he is talking about is more than just the sound of a compressor turning on. Its happened to me as well. I turned on the AC one day and the car jerked forward and I heard a loud clunking sound. I almost crapped myself but hasn't happened for a while.

04-11-2007, 09:33 PM	#6 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	^ yeah, something like that ^. but i wouldn't say that the car JUMPED forward though. just sounded like the cars turd falling into the gas tank toilet LMAO!.

04-11-2007, 09:57 PM	#7 (permalink)
kero Senior Member Join Date: Sep 2006 Location: LI, NY Posts: 438 iTrader: 0 / 0%	The compressors on the new civics are very loud and can be heard at just about any speed when they turn on and off.

04-11-2007, 10:02 PM	#8 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	oh i see. man, i hope it gets better. eventhough it was just this time doing it.

04-11-2007, 10:11 PM	#9 (permalink)
joedart Senior Member Join Date: Jan 2007 Location: agoura hills Age: 36 Posts: 114 iTrader: 1 / 100%	my si did this about 30,000 miles ago, made the car feel like i tapped on the brakes hard and the noise was kinda like "brrrrrrt". it's never done it again though.

04-11-2007, 10:18 PM	#10 (permalink)
joedart Senior Member Join Date: Jan 2007 Location: agoura hills Age: 36 Posts: 114 iTrader: 1 / 100%	^^true. i had this happen to me about 30,000 miles ago. my car went brrrrt and it felt like i tapped the brakes hard. it only happened once.

04-11-2007, 10:21 PM	#11 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	i thought that i was going to have to take it in. but i don't worry about things THAT much. i figure, it's a new car and it shouldn't be giving me any problems. i hope to HELL that my 07 and ALL 07 civics don't have to go through a RECALL....EVER!

04-11-2007, 10:27 PM	#13 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	oh ok yeah, i HATE when it rains cause my NHBP Si looks like shiet!. i have it when the rain splashes the sand and crap from the ground and onto my rotors and brakes and wheels and tires AHHHH!.

04-12-2007, 10:07 PM	#14 (permalink)
dsg2003gt Senior Member Join Date: Feb 2007 Location: Central and South, FL Posts: 111 iTrader: 0 / 0%	dude holy CRAP! I thought I Was the only one. Mine makes a loud clunk noise just like the one you described. A few times I thought I had hit the curb backing out. Then I figured out it was the AC compressor. What I noticed is that it only does it if the car sits over 12 hours or so and/or is parked outside. It didnt do it when I parked in my parents garage. It is very weird I hope it isnt hurting anything. I am afraid to bring it to honda because they will probably want me to leave it there overnight...and that is a great way to get dents.

04-12-2007, 10:13 PM	#16 (permalink)
07Sin4Door Senior Member Join Date: Mar 2007 Location: Cali Posts: 450 Dan iTrader: 0 / 0%	I can honestly say I have never used my ac LOL

04-12-2007, 10:23 PM	#17 (permalink)
dsg2003gt Senior Member Join Date: Feb 2007 Location: Central and South, FL Posts: 111 iTrader: 0 / 0%	I figured it had something to do with the clutch engagement since it would only do it when the AC was turned to on instead of just when it was on vent.

04-13-2007, 01:54 AM	#18 (permalink)
*bbRedSi* VIP Member Join Date: Feb 2007 Location: Western Mass Age: 23 Posts: 188 Brandon iTrader: 4 / 100%	i HATE that sound with a passion, sounds harmful but i guess its not....

04-13-2007, 09:18 AM	#19 (permalink)
volvo9 Senior Member Join Date: Oct 2006 Location: North Attleboro, MA Age: 25 Posts: 1,876 Andrew iTrader: 0 / 0%	You should hear it in my ford... Does that every time. Can't wait to get rid of this thing for the civic.

04-13-2007, 09:20 AM	#20 (permalink)
Johnold Senior Member Join Date: Mar 2007 Location: Florida Age: 27 Posts: 1,973 John iTrader: 0 / 0%	yeah i don't think it's harmful but sure sounds NASTY!. it only happen to me that 1 time. i'm hoping that it won't again.