joe1972 · Jul 4, 2011

My new daily drive, a 1992 Classic is great, almost everything works!!

...except the driverside heated seat (which I'm not arsed about).....and the aircon is a bit **** poor (last owner did say it needed topping up too)...so.........

Can anyone point me to the low pressure charge point connection for the Classic please?

Photos/diagram or link anyone???

can't seem to find much info, other than it not having a pollen filter, which I knew anyway:doh:

fett · Jul 4, 2011

they are both on the back of the compressor , hp and lp.

I would take it to kwick fit and make use of there offer!

joe1972 · Jul 4, 2011

Ahhh...thank you, thought it might be them. Was expecting to find it nearer to the low pressure switch on the otherside of engine bay....
So.....which one is which? (hp and lp connections)????

Already got the leakstopper and 134a, so would be a shame not to have a go first (before taking it kwikfit lol)

The Mad Hat Man · Jul 4, 2011

the regass system will only fiit on the correct fitting.

joe1972 · Jul 4, 2011

The Mad Hat Man said:
the regass system will only fiit on the correct fitting.

Yep. I'm aware of that. I would expect an R12 fitting Im guessing?

So, which side is which for low pressure and high pressure??

The Mad Hat Man · Jul 4, 2011

just try it.

joe1972 · Jul 4, 2011

The Mad Hat Man said:
just try it.

Like your style

... No doubt I will probably not have a suitable adapter to connect up to the system, but assuming I have something stashed in the shed or get one, will give it a wurl....

cheers

The Mad Hat Man · Jul 4, 2011

ffs - if yu have a re-gas can, with a gauge, then it has the correct fitting on the flexi pipe

if yu dont have a gauge - then get one

.

fett · Jul 4, 2011

you know what joe , being a dumbass I cant remember, and thats after fixing the rr and the bmw this year lol :doh:

Try looking on the net to see which is which , one is larger bore pipe than the other.

or look and see which one going from the pump to the evap (in car) is HP the one to the condenser is LP.

be carefull cos if urs is r12 your r134 can will fook it. the oil will not be compatible either.

I would get em to vac it at kwiks and fill it with new oil and 134 if they will for the £45 and they say if its not colder they give it to you free lol

failing that pop down and me and me mate with the toys can have a go

Andy Land · Jul 4, 2011

as MHM says if you have a re-charge bottle and gauge then it will only fit the low pressure connector and not the high pressure one. I've just topped up my A-Class successfully, you won't need an adaptor as they're all the same. If it won't re-charge then you either have a leak or the compressor is shagged. As a rule a cars air con system will lose about 10% in a years permanent use.

joe1972 · Jul 4, 2011

The Mad Hat Man said:
ffs - if yu have a re-gas can, with a gauge, then it has the correct fitting on the flexi pipe

if yu dont have a gauge - then get one .

I've regassed several cars before. Originally I was asking where-abouts the low pressure charge point is in the engine bay of a classic, becuase I've not done a RR before. The back of the compressor looks as though it has cover caps over the charge points. The Alfa, Maserati, and Vauxhall I've done in the past have not all had the same couplings.
The system is plated 134a (plate next to the vin)...

Was it so much to ask FFS

joe1972 · Jul 4, 2011

Andy Land said:
as MHM says if you have a re-charge bottle and gauge then it will only fit the low pressure connector and not the high pressure one. I've just topped up my A-Class successfully, you won't need an adaptor as they're all the same. If it won't re-charge then you either have a leak or the compressor is shagged. As a rule a cars air con system will lose about 10% in a years permanent use.

Thanks Andy

The Mad Hat Man · Jul 4, 2011

int that wot i sed?

fett · Jul 5, 2011

Andy Land said:
as MHM says if you have a re-charge bottle and gauge then it will only fit the low pressure connector and not the high pressure one. I've just topped up my A-Class successfully, you won't need an adaptor as they're all the same. If it won't re-charge then you either have a leak or the compressor is shagged. As a rule a cars air con system will lose about 10% in a years permanent use.

the earlier valves on these are differnt from most stuff ont he road now, or they were on my 1990

joe1972 · Jul 7, 2011

fett said:
the earlier valves on these are different from most stuff ont he road now, or they were on my 1990

Thanks Fett. Info found out about the car so far I found on the '92 I'm doing it has the R12 type thread. However, those compressor fittings were probably kept due to LR having it in the parts bin when the car was being assembled, as I think the system was either filled with 134a from birth, or converted not long after birth. (its a few years too new for R12 in theory....but we still had CFC stuff hanging around for years after this when I worked at 3M)

The propellant/refridgerant cans I just got are the std 'top-up' ones available online. not sure of the type but the guff on the side of the can says compatable with R12 and 134a systems.

The line with gauge I have is the very common 134a 'swath-lock' type design, not the thread R12, but fortunately I found an adapter I kept from my messing with a Bi-Turbo several years ago (and feckin awful car, but thats another story lol)

Assuming I can get the offroader/bobtail reassembled following the change of cylinder heads, I'll jump onto the daily driver to sort (or not) the aircon...hopefully this weekend, n report back here

fett · Jul 8, 2011

no worries m8, my buddy has the valves here if you need em but it would proabably cost more in fuel for you to come down that it would to buy some lol.

I am not sure there is an oil compatible with both r12 and r134a so I hope its already 134 mate!

groenendael · Jul 8, 2011

If its any consolation ,when I had my RRC system recharged I had to have the r12 connection changed to enable 134 to be used .

joe1972 · Jul 8, 2011

groenendael said:
If its any consolation ,when I had my RRC system recharged I had to have the r12 connection changed to enable 134 to be used .

Spot on!... Well, the work on the bobtail went better / quicker than expected (heads on and running fine...for now), so I got to work with the aircon on the daily runner as wanted;

Yep, Ive got a few thread adapters etc, and it turned out that yes, the connections are for R12. So, I've put on the adapter from the original threaded R12 to the 134a lock fitting and left it on there with a nice dust cap. connected up the guage which read about 5psi!.....so in went a can of leak stopper, then some 'top up' propellant/refridgerant (not sure what it is, but says its compatable with R12 and 134a systems)...
Once connected up to the low pressure side (the connection nearest the driverside) I removed the cover then cracked open the 'tap' just below that low pressure connection...

Once the system pressurised the compressor clutch locked and hey presto...aircon started to work. Got the system pressure up to about 40psi and so far its been nice n chilly in the cabin...
Hopefully it'll stay pressurised, but atleast stands more chance of doing so with the 'stop leak' in there too.

The photos to help explain what I've been up to;

fett · Jul 8, 2011

glad it worked mate , whats the hp side up to?

joe1972 · Jul 8, 2011

needless to say, the engine was running with the aircon set to cold with fan full on

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