PV1
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Posts: 2876
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: A/C Issue.

Mon Jul 11, 2016 1:05 pm

Posting pictures is cumbersome. You need to upload to another service like Dropbox, Photobucket, or imgur, then share the link and paste it in a post on here. If you don't want to go through all of that, you can upload them at the link below, which will send them to my Dropbox and I can post a link to the pictures for you.

https://dbinbox.com/pv1
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

Marathonor
Posts: 30
Joined: Wed Jul 06, 2016 5:33 pm
Location: Laval, Canada

Re: A/C Issue.

Mon Jul 11, 2016 7:15 pm

Thanks to PV1 for image upload explanation.

I had a detailled looked tonight at the used bracket and it seems that only the rubber are missing !. I don't know exactly how the brackets are installed but I have 4 pieces. On 2 pieces rubber are still there but completely 'unglued'. After reflexion I could perhaps had a look under the car and glued some new rubber..

I will try this week end to go under the car and perhaps tie wrap the rubber as an other member did.

Here is a link to the used brackets.

https://dl.dropboxusercontent.com/u/663 ... et%202.jpg

Thanks for your support !

Olivier, who is not completely sure to keep peanut ;o((

JoeS
Site Moderator
Posts: 3259
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: A/C Issue.

Tue Jul 12, 2016 7:52 am

Marathonor, thanks for posting the photo. Looks as though, once out of warranty, this would be an easy do-it-yourself fix utilizing some inexpensive conventional vibration isolators (Google those two words to see the thousands of options available).
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

adam
Posts: 13
Joined: Tue Apr 19, 2016 5:53 pm

Re: A/C Issue.

Sun Jul 17, 2016 7:45 pm

Initially, I thought my AC was broken until I went to the dealer for the "rust bolt battery" recall.

The noise was terrible when starting the AC and I also had a chirp noise when hitting crack on the road.

On the lift it was clear that the bracket holding the compressor were gone.

A brand new rubber spacer will look like this one:
Image

I found all four spacers unglued from the metal screws after removing the plastic protector underneath the AC compressor ( from under the car ):
Image

The dealer charge 130$ per bracket + labor for a total of 350$ + taxes.
I found something on McMaster that should replace the spacer but this time the material will be S.S. instead of the rusty steel they used previously.
11$ each + taxes & shipping ( you need 4 )
http://www.mcmaster.com/#5823K22

Meanwhile, I simply cutted into a medium/hard rubber 1/2" thk the shape of the bracket then Tie wrap them between the AC an the base bracket.
This modification alone completely removed the noise from the AC, so the AC unit is still good. :D
Image
Image

Since I have no more guaranty on the AC system, I am quite happy that only the bracket were damaged.
This being said, going under the car to do the job was long and irritating. ( the screws were rusty after only 4 years... )

mdbuilder
Posts: 226
Joined: Wed May 18, 2016 6:05 am
Location: Great Mills, Md.

Re: A/C Issue.

Sun Jul 17, 2016 7:59 pm

Nice job! :D
2015 Nissan NV200
2012 I-Miev SE Premium
2009 Mazda 5
2017 Toyota Prius Prime

JoeS
Site Moderator
Posts: 3259
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: A/C Issue.

Sun Jul 17, 2016 11:21 pm

Adam, thank you for posting the analysis, solutions, and photos. These A/C mountings look to be the first significant weak spot in the i-MiEV design, and perhaps should be added to our routine maintenance checks. Does anyone know if a broken rubber isolator is obvious just by visual inspection? If not, what would be a good way to check to see if it's ok?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

mdbuilder
Posts: 226
Joined: Wed May 18, 2016 6:05 am
Location: Great Mills, Md.

Re: A/C Issue.

Mon Jul 18, 2016 12:20 pm

When it goes you here sorta clanking noises when you hit the A/C button. Remove the plastic cover and you can see it.
2015 Nissan NV200
2012 I-Miev SE Premium
2009 Mazda 5
2017 Toyota Prius Prime

Marathonor
Posts: 30
Joined: Wed Jul 06, 2016 5:33 pm
Location: Laval, Canada

Re: A/C Issue.

Mon Jul 18, 2016 1:12 pm

Hi,
You could see partially one bracket looking under the car.

Nice job ! I've paid 400$ last week for bracket replacement, which were in fact not really the bracket but the rubber vibrators.

adam
Posts: 13
Joined: Tue Apr 19, 2016 5:53 pm

Re: A/C Issue.

Mon Jul 18, 2016 6:36 pm

Correct, when you hear a noise while using your A/C ( it feel like having an ICE car motor turning at 5000 or 6000 RPM when you push it to the max setting) lift the car, you can even see one of the bracket by pulling slightly with one hand on the plastic cover. Use the other hand to push on the A/C compressor. If all rubber bumpers are still attached, you will not be able to move the compressor.

On my car, all 4 bumpers were gone, so it was metal against metal.

Warning! You will also see orange cables going to the A/C, those have 300 ish volt potential and must be avoid.

TfeMiev
Posts: 1
Joined: Tue Aug 23, 2016 11:27 am

Re: A/C Issue.

Tue Aug 23, 2016 12:45 pm

Hammering sound
My miev has 50 000 km and first started hearing nocking sounds in combination with acceleration from low speeds combined with ac turned on. Since the hammering was of quite high frequency beyond a mechanical passive part it sounded like a small motor not properly fastened. As time went by it became sensitive to small road bumps even when AC off and when going uphill.

AC compressor unit - vibration absorbers broken
Lifted the car and found one of the four tiny chock absorbers under the AC compressor unit between front wheels just above ground had lost its rubber and a few more where aged and about to go as well.

Image

The design is a bit optimistic as the expensive and vital unit has no container or other support and may go wild if more than one of the supports break. The unit is heavy and supports are only about 10-15 mm in diameter.

I think there is no point buying expensive original part with metal bracket included if the quality issue has not been adressed by Mitsubishi.

At least rubber pads of low price should have a separate article number and not be bolted to metal brackets to be replaced.

Replacement absorbers
I have located some absorbers of same length and diameter of 60 shore rubber hardness and will give it a try. The original ones have a waist shape and are extremely soft. It may be a bit more rubber area will transfer more AC vibes to the car body. But better than a fall off and better than a rip off.

Image
Original absorbers are L=15 and D=12 mm with two 15mm M5 end bolts

Part number 1117-1255740 from Swedish comapany Kuntze D=15 mm and L= 15 mm and Hardness 60° (shore).

Bolt threads are M4 compared to original part M5 but worked ok.

Absorbers with thread M5 and D=15 x L=15 can be found at www.mecmove.se

Photo documentation

Image
Image - Absorber lost its rubber.

Image
Image - Another about to break.

Image
Image - New absorbers are best installed with brackets removed.

Image
Image - Easiest to fasten the bracket to the AC unit and then to the car body.

Done!

Vibrations are appr same as when new.

Four absorbers = $15. Nuts and washers included.

:D

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