PAG 46 oil quantity

[HellRider]

Hi there, I did air con service and I could not find anywhere how much PAG 46 oil should be in system.

All sources say "Refer To Manufacturers Specifications" or "n/a" "https://www.mahle-aftermarket.com/media/homepage/facelift/media-center/klima/thermokampagne/2-2-handbuch-fuellmengen-pkw-&-nkw-200120-gb-screen.pdf"

The only one I found is from Australia "Lexus IS250 2006 2008 6 Cyl 2.5 Eng PAG46 7 14002951 R134a 16" but it is for years 2006-2008 source: http://www.austinbaker.net/downloads/2014/2014 ABI Oil Catalog.pdf 

Will this be relevant to 2010 model?

Anyone have any confirmed quantity?

 

Thank you 

 

[HellRider]

So nobody maintain AC, that would explain 0 grams of oil in the system in fully serviced car 🤣?

[Herbie]

2 hours ago, HellRider said:

So nobody maintain AC, that would explain 0 grams of oil in the system in fully serviced car 🤣?

Probably not that, but for this reason:

Aircon servicing is basically snake oil, designed to make money for the companies who carry it out. I cannot find any advice that is impartial, only advice by companies who actually carry out aircon servicing and, of course, they are going to say that you should have it done every two years or so aren't they?
The aircon system is sealed. Nothing can get in and nothing can get out unless there is a fault or problem of some kind and that will usually manifest itself by the system beginning to make noises or not getting as cold as it used to do. That's when you take it somewhere to have it investigated, regassed, or whatever, but the idea of taking it for a 'routine service' every couple of years is an absolute con designed to relieve you of your money.
Adverts will often say that part of the service is to "take out the "old" refrigerant and replace it with "new"" - but refrigerant doesn't degrade or 'wear out' - it just 'is'. As an aside, my granny's fridge is 30 years old and the refirgerant still makes it cold as ice in there!
The system seals are lubricated by the compressor oil and again, they don't wear out or degrade unless there's a leak and the system loses oil - but again, that would show in not getting as cold as it used to.
Anecdotal evidence from friends and family shows that not a single one of them has ever had a 'routine aircon service' and not a single one of them has ever had aircon problems.

[PCM]

7 hours ago, Herbie said:

As an aside, my granny's fridge is 30 years old and the refirgerant still makes it cold as ice in there!

Agree. 

My 90+ mother's fridge has just finally given up.

It was 50 years old and never had any maintenance etc., at all.

AC is self-service - run it regularly.

[ColinBarber]

You should put back in the same amount that was taken out. Most will stay in the system so adding the full system amount back in will mean you are over.

[Texas]

The trick is to use it every time you use the car, those fridges would not have lasted anywhere near as long if you had turned them on and off 10 times a week!

[Herbie]

54 minutes ago, Texas said:

The trick is to use it every time you use the car, those fridges would not have lasted anywhere near as long if you had turned them on and off 10 times a week!

Absolutely! I never turn my AC off at all.

[RgrWynne]

14 hours ago, ColinBarber said:

You should put back in the same amount that was taken out. Most will stay in the system so adding the full system amount back in will mean you are over.

Hi Colin, not sure I understand that. I recently had mine checked after 6 years without problem, because as Herbie says it was not performing as previously. Colin , who works for Paul Frost confirmed low on gas. The machine automatically goes through a process to top it back to the required amount. It does remove old gas and filters it, but if it put back in the same amount it would still not perform. Pleased to say now working brilliantly again. Cheers, Roger

[Herbie]

Roger, I'm assuming that Colin was referring to the original question about quantity of compressor oil, not refrigerant gas.

I think the main problem is that HellRider (the OP) seems to be saying that he somehow did his own AC service, presumably at home.

That's how it comes across to me anyway because if it was carried out at a proper AC specialist, or at least by using the proper equipment, surely the machine would have recovered the existing oil into a graduated receiver, which would have negated the need to ask how much should go back in.

[RgrWynne]

Thank you Herbie, Cheers, Roger

[HellRider]

20 hours ago, Herbie said:

Roger, I'm assuming that Colin was referring to the original question about quantity of compressor oil, not refrigerant gas.

There is misleading label under bonnet that says to fill 100g of R134 and 8g of oil but this is pure bs.

After top up 100g and 8g of oil cold air was blowing only passenger side.

[Herbie]

4 hours ago, HellRider said:

that says to fill 100g of R134 and 8g of oil but this is pure bs [...] After top up 100g and 8g of oil cold air was blowing only passenger side

If it was pure BS then you wouldn't have any cold air at all.

First of all, if the system is meant to have 100g of R134 and 8g of oil, are you sure that you got those respective amounts out? If not, but you actually did put that amount back in, then you'll obviously have too much in there. However, while that may not be a good thing for any amount of reasons, I really don't think that that would cause the symptoms that you're seeing.

The fact that you have cold air on one side but not the other would suggest a problem with a siezed servo or a stuck blending flap or something like that, not the actual AC system itself.

Another possibility, if the car has dual temp/climate controls so that driver and passenger can choose their own temps, is that the temperature sensor (if it has one) on the driver's side may have gone faulty.

[HellRider]

19 hours ago, Herbie said:

First of all, if the system is meant to have 100g of R134 and 8g of oil

This is like advice of top up in my opinion, after putting 100g of refrigerant and 8 grams of oil air con was blowing cold air only on passenger side and compressor was quite loud.

Filling up system with 430g of R134 and much more oil (but much less than spec sheet from my original post) aircon is blowing ice cold and compressor work is quiet.

 

[RgrWynne]

30 minutes ago, HellRider said:

This is like advice of top up in my opinion, after putting 100g of refrigerant and 8 grams of oil air con was blowing cold air only on passenger side and compressor was quite loud.

Filling up system with 430g of R134 and much more oil (but much less than spec sheet from my original post) aircon is blowing ice cold and compressor work is quiet.

 

I think the situation you have described must be a characteristic of the system, because I first noticed a difference in temperature on each side of the middle vent, which alerted me to problems. The actual problem was low gas, in fact there was only 20% of required amount  in the system. Now it is fully charged the air con works perfectly with no temperature variation.