Check mounts. Motor mounts ECT. I wouldn't give it much thought

Sent from my SM-N986U using Tapatalk

 

Maybe the refrigerant charge is low? Oil is carried around by the refrigerant, and if it's low compressor lubrication suffers and then can lead to compressor damage. The one correct way is for an AC shop to evac the existing charge and add back the correct charge.

You can search up on related threads. Your 07 doesn't have a sightglass, but the reason behind checking it is the same (you lose charge over time).

What do you think of these AC top off kits (AC Pro, etc)?

I agree that they seem kinda hacky instead of using a manifold gauge set and vacuum. However, the system's never been opened and still works, just doesn't seem that cold - I've got to measure it. At 21 years old, the AC might have a small leak and slight refrigerant loss. These kits have...

www.toyotanation.com

Check your sight glass, folks!

It's getting hot... and my Corolla developed a squeal. Ah well, I thought, I always tighten the accessory belts a bit on the loose side to be "bearing safe" so I probably need to tighten them. The squeal seemed worse when turning the steering wheel (oh, power steering belt!), and even worse when...

www.toyotanation.com

 

Maybe the refrigerant charge is low? Oil is carried around by the refrigerant, and if it's low compressor lubrication suffers and then can lead to compressor damage. The one correct way is for an AC shop to evac the existing charge and add back the correct charge.

You can search up on related threads. Your 07 doesn't have a sightglass, but the reason behind checking it is the same (you lose charge over time).

What do you think of these AC top off kits (AC Pro, etc)?

I agree that they seem kinda hacky instead of using a manifold gauge set and vacuum. However, the system's never been opened and still works, just doesn't seem that cold - I've got to measure it. At 21 years old, the AC might have a small leak and slight refrigerant loss. These kits have...

www.toyotanation.com

Check your sight glass, folks!

It's getting hot... and my Corolla developed a squeal. Ah well, I thought, I always tighten the accessory belts a bit on the loose side to be "bearing safe" so I probably need to tighten them. The squeal seemed worse when turning the steering wheel (oh, power steering belt!), and even worse when...

www.toyotanation.com

Thanks. This did cross my mind. I have some AC gauges that I could use to check the pressure in the next few days.

 

Check the dog bone motor mount. Toyota calls it a torque strut mount. Check the rubber for tears at the front. If you do find tears, replace it with an OEM mount or a good aftermarket mount. I used Beck Arnly recently on my 07 and it solved a vibration problem at idle with my foot on the brake. Was worse with the A/C on.

Mike

 

Checked all motor mounts and noticed the AC drain hole wasn’t draining. So I blew compressed air and got it unclogged.
Then I checked the low side with the car on at idle with max ac. Outside temp was around 70* F

 

I’m not sure of the brand a/c comp I have or how the clutch engages, because the pulley etc. looks different. Was also wondering if the compressor itself has a diaphragm or piston.?

 

Looked on alldata and didn't find information regarding piston or not

Sent from my SM-N986U using Tapatalk

 

What was the high side pressure? The expansion valve will keep the low side around 30 (26-35), so at least that part doesn't look too bad. However, was it at 1500 rpms? The low side will drop more at 1500 and the high side will rise more.

At 70F ambient, you might see 2.2x-2.5x the ambient on the high side in PSI, so 154-175.

 

Bare with me because this is hard for me to explain
All reading were at a temp around 90*F (Sorry) and on the R134a part of my guages / if you need me to convert I can

At Idle
L - 38/40
H- 125 at start then spiked to around 140. Then stayed between 125/130

1500 RPM
L - 30
H - 130 kinda just stayed at 130 between rpm and idle

 

At 90F I would think your high side should be about 200-220 or so. But that's also assuming the variable compressor is at full output and not stroked down. The flow sensor can be problematic, but some members have the "magnet" trick.

Therefore you might want to consider having a reputable AC shop service the system, as that's really the one correct way of servicing. If there are no control faults and you want to add refrigerant, add no more than 2 oz at a time and allow the system to stabilize, then see what the pressures read.

Given you have a gauge set you likely already know, but I should have added: AC on Max, recirc mode, windows and/or doors open (so the system draws ambient air and not engine heat).

See also:

 

I will admit that this refrigerant stuff is a dragon I’m not ready to slay yet. I like suspension mechanical stuff. Ball joints, pressed in wheel bearing and stuff.