Belta AC compressor issue/Sensor compressor/Deut clutch compressor/2007 GLi compressor

[ahmedstudio]

My car (Toyota Belta 1.3, 2SZ engine) AC compressor had gone bad with a lot of carbon in it. I have changed the condenser, discharge pipe and compressor. The replaced compressor is also releasing carbon and it turns off the engine on idle. I've been told by 2 AC mechanics that it's due to faulty compressor. Both have suggested to not use the sensor based compressor. They have suggested to use Deut clutch compressor ) which is hot item these days for AC related issues). My question is:

1) Would it be alright to use Deut clutch compressor? How can I check if the compressor is alright, before installing it and filling the AC gas)

2) Due to alteration required in order to install Deut compressor in Belta 1.3, I am concerned about configuration of pulleys alignment. Can this compressor be aligned correctly in order to make sure that it's pulley doesn't break the belt, and hence resulting in heat up problems.

3) Any other advice besides what I have anticipated in above two questions?

Please suggest.

@Xulfiqar

[Xulfiqar]

Hi,

You need to find better trained mechanics, the so called sensor is a pwm solenoid actually which controls the compressor stroke depending on system temperature and pressure.

If your mechanics are not using scales to fill gas, the system will overcharge and then the solenoid starts to go crazy.

Similar happens if the wrong oil is used and not filled correctly in the compressor, these variable compressors actually have oil in their crankcases.

[ahmedstudio]

Hi, I have found good technicians. Still they are insisting on installing clutch based compressor. Would it be ok to do that? Also would it affect the pulley configuration / belt alignment.?

[Xulfiqar]

why do they insist on the direct clutch compressor?

[ahmedstudio]

Because sensor based compressor can't bear Pakistan summer climate. (It's experience too, I have replaced 2 sensor based compressors recently in my car). Most of corollas also (new 2018, 2017) are getting their sensor compressors replaced with clutch compressors. I have seen many of them

[Xulfiqar]

You have moron mechanics.

The same PWM compressors work in middle east, Tropical Africa, the South of USA (its hotter than satans armpit) and the whole of south americas.

corolla, camry (and all its variants). VW (since the early 2000) use PWM solenoid compressors.

I repair such cars here - and just follow the service manual; The AC works perfect (avg summer temp is 40C)

@archon2001 - please tell if newer corolla and camry A/C works in Miami.

[ahmedstudio]

Do you put brand new PWM compressors? or can they be repaired?

[Xulfiqar]

They are repaired - Infact I put in new front seals on them before installing - which requires the whole compressor to be disassembled first - the new sealing kit contains body O rings too.

As I said the variable swash plate compressors are not built the same as direct drive type.

[ahmedstudio]

Alright. Mechanics here don't know anything. They just can install available stuff only.

[Xulfiqar]

If you are dealing with such and have no other choice than to modify the mounting brackets etc then get a sanden 709C with serp belt fitting. It will pump even when there is grease in it instead of oil and refrigerant.

Even in used form it will have a way way longer service life as its a commercial application compressor.

The duet/vitz/corolla/camry compressor is also a direct clutch with the typical 10 cylinder denso layout.

[ahmedstudio]

I can't find sanden compressor. Is duet fine?

[Xulfiqar]

I dont think its your choice what is fine and what is not as your techies are in charge - Get whatever they install. Reason to say that you are not in charge is that - they cannot get the PWM solenoid compressor to work correctly.

As long as they can mount the compressor and bolt up the lines and show you a good service performance from the A/C - you would be alright. - As the compressors they would be sourcing are from scrap, get them to replace the front seal as it would be leaking.

[ahmedstudio]

Ok. Thank you for advises and time.

[Xulfiqar]

no probs,

Make sure the system is oiled with correct oil (PAG 46), the system vacuumed with a vacuum pump and charged by weight (not pressure checking only) - otherwise you will be back at square one.

[ahmedstudio]

Charged by weight means?

[ahmedstudio]

They have put this oil, image attached. It's R134 compatible.

[Xulfiqar]

refrigerant is measured in weight (grams/ounces) - the system capacity is printed on a sticker in the engine room and printed in the service manual too.

The tech is supposed to put the cylinder on a scales, zero it after purging manifold - open up the valve on vapour and let gas flow till the scales read the correct amount as required.

e.g. usually corollas take 500 or so grams.

[Xulfiqar]

whats its viscosity? I dont see it written anywhere

[ahmedstudio]

It's written R134a on it

[ahmedstudio]

Manual attached. It says 5.4 litre for 2sz-fe. Is it measured in litres?