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 Post subject: AC Oil
PostPosted: Tue Dec 04, 2018 4:17 pm 
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Just fitted the whole AC system & ready for R134a gas. Anyone know quantity & what oil to use in the system?


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 10:43 am 
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It takes 30 oz which is 850 grams. If you've converted it to R134a then use that. Wasn't aware of different types of gas?

Stuart

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Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 11:03 am 
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scam75 wrote:
It takes 30 oz which is 850 grams. If you've converted it to R134a then use that. Wasn't aware of different types of gas?

Stuart


It's completely retro fitted but the compressor has the R134a sticker which the previous owner had.


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 12:42 pm 
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Ok. I'd put 10ml of ester oil in when you fill it first time. I would also vac it out before filling.

Stuart

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'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK

Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 12:50 pm 
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scam75 wrote:
Ok. I'd put 10ml of ester oil in when you fill it first time. I would also vac it out before filling.

Stuart


Is that all it takes; 10ml of Ester?

So the 850 grams refers to the R134a?


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 2:37 pm 
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The 10ml of ester will eat into the 850 grams, which is full system capacity, but not by much.

Don't use any more than 10ml of ester or you'll cause problems. It's worth doing in an older style AC system when you wish to use R134a as it will condition seals etc.

Stuart

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'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK

Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 5:03 pm 
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most of the info you need is in Chassis vol3x of the 944 manual,

www.pdlibrary.co.uk

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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 5:40 pm 
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Waylander wrote:
most of the info you need is in Chassis vol3x of the 944 manual,

http://www.pdlibrary.co.uk



I have the manual, but don't see the Vol3X!?


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 Post subject: Re: AC Oil
PostPosted: Wed Dec 05, 2018 11:04 pm 
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Click on 944 manuals and it’s a drop down list
It’s there

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 Post subject: Re: AC Oil
PostPosted: Fri Dec 07, 2018 2:04 pm 
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Waylander wrote:
Click on 944 manuals and it’s a drop down list
It’s there


Thanks for the manual; really interesting.


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 Post subject: Re: AC Oil
PostPosted: Thu Jan 24, 2019 11:30 am 
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scam75 wrote:
The 10ml of ester will eat into the 850 grams, which is full system capacity, but not by much.

Don't use any more than 10ml of ester or you'll cause problems. It's worth doing in an older style AC system when you wish to use R134a as it will condition seals etc.

Stuart


Are you sure you mean 10ml; or 100ml?


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 Post subject: Re: AC Oil
PostPosted: Thu Jan 24, 2019 6:46 pm 
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10ml. No more.

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'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK

Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.


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 Post subject: Re: AC Oil
PostPosted: Fri Jan 25, 2019 9:03 am 
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According to the AC tech I have spoken to, at least 100ml is needed. Especially, if a new Condenser & dryer have been fitted.

10ml seems like a very small amount to go around the AC system.


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 Post subject: Re: AC Oil
PostPosted: Fri Jan 25, 2019 10:53 am 
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I was told 10ml by Cool It in Dorset who know these systems very well. That's what I used and it worked fine, still working great 2 years on. Only passing on what I was told and what worked for me!

Stuart

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'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK

Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.


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 Post subject: Re: AC Oil
PostPosted: Fri Jan 25, 2019 11:31 am 
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scam75 wrote:
I was told 10ml by Cool It in Dorset who know these systems very well. That's what I used and it worked fine, still working great 2 years on. Only passing on what I was told and what worked for me!

Stuart


So, did you actually insert the 10ml into the system?


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