AC Compressor Issue?

[SAC-CA-Runner]

I have done a search and it seems there are things all over the board so I thought I'd start a new thread. So whenever my AC is on, sometimes when I'm at an idle I can feel a very distinct vibration in the pedals and a noise. It almost sounds like a pulley vibration. If I turn the AC off while it is doing it, it stops. While driving it doesn't do it as the engine speed/torque I'm sure is making whatever is vibrating balance out a tad from faster rotation. So I know it's something related to the AC being on. Could it be the clutch? The pulley? Another pulley taking a load once the AC turns on and the clutch is engaged on the AC compressor? I also noticed on a trip down to SoCal over the 4th, a couple of times my AC would be on low and all of a sudden it would blow like it's on high for a minute or so. Then go back to regular. Thoughts? If it's easier to just swap the whole compressor I'll do that. I'm at 175k so I don't mind spending extra and not band aiding it. Just wondering if someone else has had that vibration issue and what was done to fix it. Thanks!

 

[keakar]

remove the serpentine belt and see if the a/c clutch is loose when you wiggle it around, then spin it and see if its grumbly or raspy when it spins indicating a bad bearing. that's all I can think of that would cause the vibration only with the a/c

 

[SAC-CA-Runner]

OK...so reviving a post from the past. Another thing I replaced on my engine was my AC Compressor due to a bearing failing. I ordered a new OEM Denso off Amazon and noticed (see pic) that the new one didn't come with the front cover like the original. I'm thinking this is just to keep out debris but I see a lot for sale for other Toyota models that don't have that metal type cover on it with the 4 holes. I could have swapped mine out as it's just a bolt, but then I'd be replacing a portion of the clutch with something used. Keep it the way it is or take it out and return this one? My thoughts are leave it since other cars run them this way. I'm just worried about offroading and dirt/debris/etc getting in the clutch without that cover.

 

[WOLVERINE]

Looks like the same unit they put in the 3.4L Tacoma's - I don't think you have to worry too much - if it is the same one as the 3.4L tacoma's then they are serviceable - if you have issues in the future, you can take the 10mm bolt off of the front plate and then two snap-rings if necessary to remove the pulley and magnetic clutch and replace bearings/clutch if necessary - no need to replace the whole unit or charge/discharge the AC.

Do you have the Denso part # that you ordered?

This was what your OEM looked like right ? :

 

[SAC-CA-Runner]

Looks like the same unit they put in the 3.4L Tacoma's - I don't think you have to worry too much - if it is the same one as the 3.4L tacoma's then they are serviceable - if you have issues in the future, you can take the 10mm bolt off of the front plate and then two snap-rings if necessary to remove the pulley and magnetic clutch and replace bearings/clutch if necessary - no need to replace the whole unit or charge/discharge the AC.

Do you have the Denso part # that you ordered?

Hmmmm, I swear I got the part off this forum (471-1485). And Amazon said it fit my vehicle. I did notice that there was an "L" or something on the original one when I compared them. I guess I could have replaced the clutch and bearing instead of the whole unit, but I was ripping out the condenser and all that anyway to do the swap and I honestly didn't know you could just swap that. Guess I didn't search well enough AND I should have taken the two hard lines on the passenger side going to the firewall as I accidentally dropped the engine a little and crimped them, bad. Oooops! I'm just hoping when that happened I didn't crimp a wire in the 02 harness which is causing my CEL and it is indeed a bad sensor.

 

[WOLVERINE]

I don't know the year of your 4runner or engine - but I would say that you are good if you cross-referenced the part and it works great. Don't sweat the "dust" shield.

 

[AuSeeker]

For what it's worth, if you haven't returned the old compressor for the core deposit, I would remove the dust shield and just keep it in case you decide you would like to install it at a later date, better to have it if you need/want it later than to need/want it later and not have it!!

 

[SAC-CA-Runner]

For what it's worth, if you haven't returned the old compressor for the core deposit, I would remove the dust shield and just keep it in case you decide you would like to install it at a later date, better to have it if you need/want it later than to need/want it later and not have it!!

I did just that! Thing is...the dust shield is riveted on to the outer portion of the clutch. Hence why I didn't want to swap it over to the new AC Compressor. Didn't want to mix new plate face with an old plate face