No Aircon Unit
#1
05-18-2020 | 03:00 PM
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From: Devon
No Aircon Unit
Purchased a SH v12 xjs at the end of 2018 from a sold called reputable classic dealer here in the uk, pottered around in it for a few months last year and took it off the road mid year as it failed its mot.
Now trying to put it back on the road, ordered new belts and they would fit, always wondered why there was a few pipes not connected and its apparent this car is missing its aircon unit
How hard is this going to be to sort out please ?
thanks in advance for any help/advice.
Rowland
Devon UK.
Now trying to put it back on the road, ordered new belts and they would fit, always wondered why there was a few pipes not connected and its apparent this car is missing its aircon unit
How hard is this going to be to sort out please ?
thanks in advance for any help/advice.
Rowland
Devon UK.
#2
05-18-2020 | 03:12 PM
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Joined: Jan 2013
Posts: 4,909
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From: Calgary, Canada
By "aircon unit" do you mean the compressor on the engine, or the heater/air conditioning unit behind the dash that contains the heater core and evaporator?
Is your car pre 1993? If so, and if it's the compressor, those are very common units in North America, as it was a General Motors unit, called the A6. Used in millions of cars and trucks, but there are variants. Differences include either metric or SAE mounting bolts, the location of the electrical connection for the clutch and the compressor protection. Earlier cars used a superheat switch, later ones used a low pressure switch. The compressor might be harder to source in the UK, but they should be out there. The XJ6/12 and S all used the same compressor for many years.
As a minimum, you'll need the compressor, verify that the mounting plates on the engine are present, you'll need to verify that the hoses are all present and correct, you'll need a retaining plate for the hoses to the compressor, and a new receiver/dryer. That's the tube device above the radiator. Presumably, there was originally a leak, so once everything is in place you'll need to verify that the system will hold vacuum.
Do you have cruise control? The cruse bellows should have mounted to a bracket on the back of the compressor, so you'll need that bracket too if missing.
Is your car pre 1993? If so, and if it's the compressor, those are very common units in North America, as it was a General Motors unit, called the A6. Used in millions of cars and trucks, but there are variants. Differences include either metric or SAE mounting bolts, the location of the electrical connection for the clutch and the compressor protection. Earlier cars used a superheat switch, later ones used a low pressure switch. The compressor might be harder to source in the UK, but they should be out there. The XJ6/12 and S all used the same compressor for many years.
As a minimum, you'll need the compressor, verify that the mounting plates on the engine are present, you'll need to verify that the hoses are all present and correct, you'll need a retaining plate for the hoses to the compressor, and a new receiver/dryer. That's the tube device above the radiator. Presumably, there was originally a leak, so once everything is in place you'll need to verify that the system will hold vacuum.
Do you have cruise control? The cruse bellows should have mounted to a bracket on the back of the compressor, so you'll need that bracket too if missing.
#3
05-19-2020 | 01:53 AM
Thread Starter
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Junior Member
Joined: Nov 2018
Posts: 13
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From: Devon
By "aircon unit" do you mean the compressor on the engine, or the heater/air conditioning unit behind the dash that contains the heater core and evaporator?
Is your car pre 1993? If so, and if it's the compressor, those are very common units in North America, as it was a General Motors unit, called the A6. Used in millions of cars and trucks, but there are variants. Differences include either metric or SAE mounting bolts, the location of the electrical connection for the clutch and the compressor protection. Earlier cars used a superheat switch, later ones used a low pressure switch. The compressor might be harder to source in the UK, but they should be out there. The XJ6/12 and S all used the same compressor for many years.
As a minimum, you'll need the compressor, verify that the mounting plates on the engine are present, you'll need to verify that the hoses are all present and correct, you'll need a retaining plate for the hoses to the compressor, and a new receiver/dryer. That's the tube device above the radiator. Presumably, there was originally a leak, so once everything is in place you'll need to verify that the system will hold vacuum.
Do you have cruise control? The cruse bellows should have mounted to a bracket on the back of the compressor, so you'll need that bracket too if missing.
Is your car pre 1993? If so, and if it's the compressor, those are very common units in North America, as it was a General Motors unit, called the A6. Used in millions of cars and trucks, but there are variants. Differences include either metric or SAE mounting bolts, the location of the electrical connection for the clutch and the compressor protection. Earlier cars used a superheat switch, later ones used a low pressure switch. The compressor might be harder to source in the UK, but they should be out there. The XJ6/12 and S all used the same compressor for many years.
As a minimum, you'll need the compressor, verify that the mounting plates on the engine are present, you'll need to verify that the hoses are all present and correct, you'll need a retaining plate for the hoses to the compressor, and a new receiver/dryer. That's the tube device above the radiator. Presumably, there was originally a leak, so once everything is in place you'll need to verify that the system will hold vacuum.
Do you have cruise control? The cruse bellows should have mounted to a bracket on the back of the compressor, so you'll need that bracket too if missing.
thank you for your reply.
the car is 88
Yes the compressor is missing, has a u shaped bracket to fit it in but not sure about anything over the engine
The car was supposedly re-engined so probably not expecting a leak in the piping, have several loose end pipes, guess while i have the front off doing the water pump some photo's of the loose ends may help identify more whats missing.
no cruise control to my knowledge, found a fixed stainless pipe behind the radiator but no tibe
many thanks again
#5
05-19-2020 | 09:09 AM
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Joined: Apr 2014
Posts: 4,115
Likes: 3,185
From: Kent, UK
RowlandHill,
If the car is fairly standard and not -re-engined to put in a load of performance mods, saldy I would be very surprised if it's only a compressor that is required to get your aircon working.
Most people remove the belt or the heavy compressor itself when a problem happens, leaking hoses, compressor drier, evaporator matrix etc etc I've even seen people discoonect the aircon when the root cause is an engine radiator that is past its best and running the aircon exacerbates an overheating problem.
As a minimum, you need a new receiver drier plus the compressor and presume that other seals / valves may need replacing. The best approach would be to fit a compressor, associated ancillaries and a receiver drier and then get a vacuum test on it, rather than recharge it. You may then get an indication of other leaks within the system. Most reputable UK aircon specialists would refuse to recharge an unknown system without doing a vacuum or inert gas test.
I'm not sure what was fitted previously but you'll also be making the decision as to which gas to use. R134a (or equivalent) would necessitate changing parts, whereas I would be tempted to use an R12 drop-in equivalent such as RS24.
Good luck
Paul
If the car is fairly standard and not -re-engined to put in a load of performance mods, saldy I would be very surprised if it's only a compressor that is required to get your aircon working.
Most people remove the belt or the heavy compressor itself when a problem happens, leaking hoses, compressor drier, evaporator matrix etc etc I've even seen people discoonect the aircon when the root cause is an engine radiator that is past its best and running the aircon exacerbates an overheating problem.
As a minimum, you need a new receiver drier plus the compressor and presume that other seals / valves may need replacing. The best approach would be to fit a compressor, associated ancillaries and a receiver drier and then get a vacuum test on it, rather than recharge it. You may then get an indication of other leaks within the system. Most reputable UK aircon specialists would refuse to recharge an unknown system without doing a vacuum or inert gas test.
I'm not sure what was fitted previously but you'll also be making the decision as to which gas to use. R134a (or equivalent) would necessitate changing parts, whereas I would be tempted to use an R12 drop-in equivalent such as RS24.
Good luck
Paul
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