Umair Gaines
The Toyota MR2 is a popular car, and many owners are interested in modifying their vehicles with modern features such as electric air conditioning. While some sources suggest that it is possible to install an electric AC system in the MR2, others indicate that it is a challenging task that may require a bigger alternator and various other modifications. It seems that AC condensers for the MR2 can be difficult to come by, and they may need to be imported from overseas, which can be expensive.
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What You'll Learn
AC Condenser for Gen2 (1991) Toyota MR2
The Toyota MR2 is a popular car, and many owners have discussed the air conditioning (AC) condenser online. It seems that AC condensers for the 1991 Toyota MR2 are available from PartsGeek.com, with fast shipping and good protection during transit.
However, some people have reported issues with ordering this part online, with retailers cancelling orders due to a lack of stock or not having an estimated time of arrival for more stock. It seems that AC was not a standard option for this model, and some owners have had to resort to buying imported parts from Japan.
There is also discussion about the compatibility of AC condensers from later MR2 models with the 1991 MR2. Some owners suggest that the 1994+ AC condenser will not work with the 1991 model, as the refrigerants are different (R12 for the 1991 model, and R134a for the 1994+ model). However, others suggest that it is possible to retrofit the newer condenser with the correct seals and by flushing the system to remove the mineral oil used in the R12 system.
One owner has also suggested that it is possible to install an entirely electric AC system in the 1991 MR2, although this would require a larger alternator to power the compressor, which would be located in the boot of the car.
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Modernising AC in AW11
Modernising the air conditioning in your AW11 MR2 can be a challenge, but it is possible. Here are some options and considerations to help you get started:
Electric AC System
If you're looking for a more modern and efficient solution, you may consider retrofitting an electric AC system. This option was mentioned by several MR2 owners who were seeking a more environmentally friendly and powerful AC system. However, it is important to note that this option may require significant modifications to your vehicle, including the addition of a second battery to handle the power draw of the electric AC unit.
New Compressor
Installing a new compressor is often recommended as a more straightforward alternative to retrofitting an electric AC system. This option can still be a challenge, as it may involve dealing with rusty bolts and other complications. However, it is generally considered to be less complex than a full electrical retrofit.
Refrigerant and Oil
It is important to ensure that your AW11's AC system is using the correct refrigerant and oil. Older systems used R12 refrigerant, which is no longer available and should be replaced with R134a. Mixing these refrigerants can cause issues, so it is important to have any remaining R12 professionally removed before refilling with R134a and the appropriate oil, such as PAG 100 or Ester-based oil.
Condenser Radiator
When modernising your AC system, you may also need to consider the condenser radiator. In some modern AC setups, the condenser radiator is mounted in the boot of the car, with a fan blowing air directly onto it. This configuration helps to cool the refrigerant before it reaches the compressor.
Hybrid Drivetrain
For a more comprehensive modernisation, you may consider swapping out the entire drivetrain for a hybrid system. This option has been contemplated by several MR2 owners, who believe that a hybrid drivetrain could improve fuel efficiency and city driving. However, it is a significant undertaking that may not be suitable for everyone.
In conclusion, modernising the AC system in your AW11 MR2 can range from updating the refrigerant and oil to a full electric AC retrofit or even a hybrid drivetrain swap. Each option has its own benefits and challenges, so it is important to carefully consider your priorities and mechanical expertise before beginning any modifications.
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AC Condenser cost
The cost of an AC condenser varies depending on several factors. The price of a new AC condenser unit can range from $1,000 to $6,100, with an average cost of $2,900.
One of the main factors influencing the cost is the unit's size and output. Larger units with higher cooling capacities tend to have higher unit costs. The size of condensers typically ranges from 1.5 to 5 tons, with larger units being more expensive to replace.
The type of coil in the AC condenser is another significant cost factor. There are three main coil types: fin-and-tube, micro-channel, and spine-fin. Fin-and-tube coils are the least expensive, typically costing between £1,200 and $4,200. Micro-channel coils are highly efficient and corrosion-resistant but are the most expensive option, ranging from £2,500 to $5,500. Spine-fin coils offer improved efficiency and leak resistance over fin-and-tube coils, with costs between £1,400 and $2,700.
Labor costs also play a crucial role in determining the overall expense. HVAC labor charges can range from $75 to $250 per hour, and replacing a condenser usually takes three to six hours. The complexity and accessibility of the job can impact labor fees, with more intricate or challenging-to-access installations, such as roof-mounted condensers, tending to be more expensive.
The brand and quality of the AC condenser can also affect the price. High-end brands and units with premium features, such as a high SEER rating (seasonal energy efficiency ratio) or a low decibel rating, tend to have higher-priced parts. A higher SEER rating generally indicates superior quality and engineering, resulting in higher prices.
In some cases, it may be more cost-effective to replace the entire AC system rather than just the condenser. Additionally, if your AC condenser is under warranty, you may only need to pay for labor, which can reduce the overall cost of replacement.
Regarding the cost of a condenser for a Mk2 MR2 specifically, one source mentions a price of £300, while another mentions purchasing one from Amazon for £108, with shipping and import taxes bringing the total to £198.
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AC Condenser availability
The availability of AC condensers for the mk2 MR2 can be challenging, and finding a suitable and affordable option may be difficult. Some sources suggest that AC condensers for this specific model are scarce due to front-end collisions, which often result in condenser damage.
One option for owners is to explore second-hand or used condensers, but the quality and condition of these may vary, and they may not be a long-lasting solution. Websites like eBay offer a platform to search for used parts, but it can be challenging to find one in good condition.
Another option is to consider purchasing a new condenser. While this can be more expensive, it ensures a functional and reliable part. Online retailers like Amazon and PartsGeek offer new condensers, but prices can range from £108 to £350, excluding shipping and taxes, which can significantly increase the overall cost.
Additionally, some MR2 owners have explored retrofitting an electrical AC system, which can be a complex but rewarding project. This typically involves installing a new compressor, which can be sourced from various suppliers, and potentially replacing other components like hoses and compressor oil.
Finally, there is the option of considering alternative solutions, such as aftermarket seats with built-in cooling fans, which can provide a similar level of comfort during hot weather without the need for a fully functional AC system.
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AC Condenser installation
Installing an AC condenser is a complex task usually handled by professionals. However, if you're looking to install an electric AC condenser in your MR2, there are some options and steps you can consider.
Firstly, it's important to note that retrofitting an electrical AC system can be challenging. You may need to replace the compressor oil and all hoses, and it might be more cost-effective to simply install a new compressor. If you're set on an electric AC system, you'll need a bigger alternator as these tend to draw quite a bit of power.
When installing the condenser, choose a level and firmly supported location with enough space to access the service valves. Ensure you don't cut any lines before the new condenser is ready to install, as leaving them open can result in moisture infiltration. Install liquid and suction lines from the evaporator to the condenser site, supporting them with straps and avoiding any coils that could trap pooled oil.
Next, pressurize the lines with inert gas while brazing to prevent oxidization, but never braze a line containing refrigerant. Check for leaks by pressurizing the lines and letting them sit for an hour. If the pressure drops, coat the lines with soapy water and look for bubbles at the leak site.
Finally, wire the condenser unit according to the manufacturer's instructions, ensuring you comply with local wiring standards and electrical codes. Set the thermostat low enough for the solenoid to engage as soon as the system is powered on. Check the high and low pressures across various temperatures to ensure they meet the manufacturer's specifications.
If you encounter any difficulties, it's recommended to consult a licensed air conditioning contractor for assistance.
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Frequently asked questions
I cannot find definitive proof that the mk2 mr2 has an electric AC condenser. However, there are forums discussing the possibility of installing an electric AC condenser in the mk2 mr2.
You can find AC condensers for the mk2 mr2 on Amazon, eBay, and PartsGeek.
Some alternatives to installing an electric AC condenser in the mk2 mr2 include installing an entirely new compressor or replacing the compressor oil and hoses.
Some challenges of installing an electric AC condenser in the mk2 mr2 include the cost and effort of putting the AC system back into operation, as well as the potential for voltage drop.
