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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Mon Jun 13, 2016 8:42 pm    Post subject: Reply with quote

jonttt wrote:
Oilline wrote:
Got mine booked in for a new evaporator on the 27th June at Revolution Porsche. I've been quoted £650 + VAT including expansion valve. Hope this cures it, I changed everything else myself last year but still had a sweaty trip down to Angouleme. Hope to be cool this year !


That sounds remarkably cheap for an evaporator, are you sure you don't mean new condenser fitted Dont know


Nope , new evaporator. I replaced the condenser last year. They are quoting 5 hours labour, £206 for the condenser, £40.95 for the expansion valve, £54 re-gas, couple of O rings, total actually less than i said, £546.92 + VAT
 
  
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jonttt
Shanghai


Joined: 20 Aug 2012
Posts: 4914
Location: Liverpool


PostPosted: Mon Jun 13, 2016 10:20 pm    Post subject: Reply with quote

I hope you have fixed the price as it will them 5 hours to strip it down, putting it all back together Hand
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1997 Porsche 911 993 C4S My Journal
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Milly
Newbie


Joined: 13 Jan 2016
Posts: 11
Location: Devon


PostPosted: Mon Jun 27, 2016 10:39 am    Post subject: Reply with quote

Whenever you break into the A/C system you should always replace the Desiccator/dryer. Was £37.54 (discounted 15%) + VAT last year.
In total I was quoted an estimated £1,500 last year to replace the Evaporator,expansion valve and dryer, so did it myself as the labour is by far the largest factor. Very pleased to have carried it out successfully but blankets etc. to protect the wings did not prevent me putting 3 dents in them as I hopped in an out of the front Sad
 
  
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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Wed Jul 06, 2016 5:25 pm    Post subject: Reply with quote

Oilline wrote:
Got mine booked in for a new evaporator on the 27th June at Revolution Porsche. I've been quoted £650 + VAT including expansion valve. Hope this cures it, I changed everything else myself last year but still had a sweaty trip down to Angouleme. Hope to be cool this year !


Collected car today from Revollution Porsche, new evaporator fitted, icy cold air con at last. And done in 5 hours as quoted. thumbsup
 
  
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Helsinki Paul
Montreal


Joined: 26 Oct 2009
Posts: 512
Location: Finland


PostPosted: Wed Jul 06, 2016 6:39 pm    Post subject: Reply with quote

stevewak wrote:
Update: Car back from JAZ with exchange a/c compressor (£450 + VAT ) labour and re-gas (£115+ VAT). All good. Technician explained condenser would need doing "in a couple of years" and that he "can't remember doing an evaporator". I'm happy - nice cool dry air.


Great that all's well. For any one else needing a new compressor. I can recommend https://www.amazon.com/Porsche-93-94-Compressor-Clutch-Denso/dp/B00ACDDQWE

It was a tip from another poster on here can't remember who but thanks any way. Been on 6 months and running perfectly. Fitted by OPC who said it was indistinguishable from official Porsche part, fraction of the cost too.

Cheers Thumb
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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Thu Jul 07, 2016 8:46 pm    Post subject: Reply with quote

What temperature should the air con blow at on full output? Im seeing 11 degrees with outside temp at 18 degrees.
 
  
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ToreB
Approved Trader


Joined: 13 May 2010
Posts: 561
Location: Oslo, Norway


PostPosted: Fri Jul 08, 2016 6:12 am    Post subject: Reply with quote

11 degrees is about normal. I often see 7-9 degrees C measured at the dashboard vent opening.
Measure temperature at vent opening, 20 deg C ambient, hot engine, no sunshine, resirc on, min temp and max fan. (or Max A/C button pressed) Let the system run like this for some time to allow for proper recycling of the air in the cabin.

If your A/C compressor clutch is cycling with 10-30 seconds intervals in 20 deg C ambient, you have a working A/C system. If you still do not get cold temperatures, you probably have a defective mixer flap servo or two, allowing for heated air flow from the engine.
Cheers,
Tore

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Endoman
Suzuka


Joined: 11 Apr 2011
Posts: 1077
Location: Bolton U.K.


PostPosted: Sat Jul 09, 2016 9:05 am    Post subject: a/c sill pipes Reply with quote

Mine failed twice. 2nd time because TSB was not followed by indie and existing corrosion remnants abraded the new pipe, aluminium oxide is a very good abrasive.
Loads of TSBs on pcar site very kindly posted by Geolab.
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jhrfc
Silverstone


Joined: 26 Apr 2016
Posts: 102


1994 Porsche 993 Carrera 2

PostPosted: Tue Mar 13, 2018 5:15 pm    Post subject: took the plung with my AC Reply with quote

My AC hans't worked for the two years I've had the car, and i finally took the plunge to read up and have a look. (40 degree heat in France last year encouraged me!)
First thing i discovered, was my AC is aftermarket, although fitment included the right HVAC controller with the AC buttons and wiring, so probably quite a bit was spent fitting it. A lot of the time a separate button is installed.

A trip to alpinair and testing showed the system was empty and the condenser is rotten.
After vacuum testing and re-gassing, the compressor and pipework seem good, as does the evaporator, which being aftermarket, is copper so should not rot so easily.
the system now has uv died gas and oil in it and the ac works as expected, but i will take the plunge and get the condenser changed.

I also used Tore B's excellent web pages to check out that all the buttons and servos etc where working properly, which they all were apart from the footwell flap controls, which did not work.
Tore's guide suggested these servos can go, but you might get a temp fix by giving them a tap.
So i removed the cover at the back of the frunk to have a look. To my surprise, I found the servo did work, but the articulation arm attaching it to the flap had come off.
I put it back on, but it fell off again, so have now applied judicious some blu tack to the holder and it seems to be staying in place and all the flaps and AC work. Hooray!
Hopefully this will be made long lasting by replacing the condenser.
Feeling pretty satisfied, at using the resources on here and Tore's site with a bit of specialist help to get to the bottom of it.
J
 
  
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Cameltoe & Heel
Suzuka


Joined: 26 Jan 2009
Posts: 1118
Location: Preston - Lancs


PostPosted: Wed Mar 14, 2018 2:02 pm    Post subject: Reply with quote

Chaps,

I dig this topic and it's something I'm going to have to tackle when commissioning my car later this year.

So a couple of questions, as part of my rebuild I'll have to remove the fuel tank to remove any old fuel, so whilst there should I replace the evaporator whilst there?, if yes where best to source?.

Also, I think I'll might as well swap the condenser, can't remember what shape it's in to be honest.

it will certainly need a new drier to as the system has been open.

Any pointers appreciated,

Cheers
Trev
 
  
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jhrfc
Silverstone


Joined: 26 Apr 2016
Posts: 102


1994 Porsche 993 Carrera 2

PostPosted: Wed Mar 14, 2018 2:57 pm    Post subject: Reply with quote

if you are taking the tank out, to me, it would make sense to do the evaporator at the same time. (unless when you see it it looks pristine i guess)
design 911 has the evaporator part at £200. as in this thread i think you need to do the valve at the same time.
J
 
  
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Endoman
Suzuka


Joined: 11 Apr 2011
Posts: 1077
Location: Bolton U.K.


PostPosted: Sat Mar 17, 2018 2:26 pm    Post subject: Reply with quote

I replaced almost the full system last year. Evap. condenser, valve, pump amd fans.
Took a week with invaluable help from my mate Jim @ Chill Out, Bretherton.
The pump is the same as a Toyoto (much cheaper) Evap was all aluminium from Keuhl in the States condenser and fans from Eurocarparts. Prices vary wildly especially the fans. Amazing what you find when you take the tank out (a bit like an old sofa)
Can be a very expensive job unless you diy and search for best prices. Lots of bits to remove and easy to forget what goes where, so take pics and notes. There is a pretty good write up on Rennlist or Pelican but some differences on lhd models and beware two hidden screws when the heater box is split.
Not a job for the faint hearted.
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hopeydaze
Silverstone


Joined: 06 Jan 2012
Posts: 117
Location: Wargrave, Berkshire, UK


PostPosted: Sat Mar 17, 2018 3:51 pm    Post subject: Reply with quote

Not a job for the faint hearted.[/quote]

I am faint-hearted so I let a leading independent do the full replacement for me - condenser first and then they found the evaporator needed replacing as well. Just so people realise how expensive this is - there's no change from £2,000 including VAT. Labour for the evaporator is particularly costly.
 
  
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9xxnick
Monza


Joined: 29 Jul 2014
Posts: 154



PostPosted: Tue Mar 20, 2018 3:49 pm    Post subject: Reply with quote

Replacing the evaporator is a difficult job and will be expensive. There's little point in removing the fuel tank and not replacing this as a matter of course, and probably the twin fans too. The condensate drain pipes should also be thoroughly cleared when you have full access as well.

I had a Behr condensor fitted about four years ago which then sprung a leak just 3 years after fitment. I swapped all the components over to NRF as they offer a substantial saving on Porsche-branded parts and they have been fine since, although the proof will be in how long they last beyond the 10 year point of course.
 
  
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jhrfc
Silverstone


Joined: 26 Apr 2016
Posts: 102


1994 Porsche 993 Carrera 2

PostPosted: Mon Mar 26, 2018 12:58 pm    Post subject: Reply with quote

after my new condensor has been fitted all now works.
Quite treat to be able to hit the demist button and watch it work before your eyes!
 
  
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