Air conditioning system
WantedAccessories
04-23-22, 02:07 AM
#6
The earliest USDM LHD had a system installed once the cars had landed in the US. This system is referred to as the Mana System. At some point, this was replaced with system referred to as the Denso system. The earlier systems ran R12 a/c fluid. This was changed to R134a a/c fluid as R12 was deemed environmentally unfriendly. The different systems have different fittings and seals and can not be easily mixed and matched.
The serial number of your car will give a clue as to which system it originally had. If it was an r12 system things may be problematic is several ways.
It will be helpful if the "diffuser" in the dash is still there. I may not have been removed when the rest of the system was taken out.
There are several threads that explore the issues to a great extent.
The serial number of your car will give a clue as to which system it originally had. If it was an r12 system things may be problematic is several ways.
It will be helpful if the "diffuser" in the dash is still there. I may not have been removed when the rest of the system was taken out.
There are several threads that explore the issues to a great extent.
04-24-22, 08:31 PM
#7
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The earliest USDM LHD had a system installed once the cars had landed in the US. This system is referred to as the Mana System. At some point, this was replaced with system referred to as the Denso system. The earlier systems ran R12 a/c fluid. This was changed to R134a a/c fluid as R12 was deemed environmentally unfriendly. The different systems have different fittings and seals and can not be easily mixed and matched.
The serial number of your car will give a clue as to which system it originally had. If it was an r12 system things may be problematic is several ways.
It will be helpful if the "diffuser" in the dash is still there. I may not have been removed when the rest of the system was taken out.
There are several threads that explore the issues to a great extent.
The serial number of your car will give a clue as to which system it originally had. If it was an r12 system things may be problematic is several ways.
It will be helpful if the "diffuser" in the dash is still there. I may not have been removed when the rest of the system was taken out.
There are several threads that explore the issues to a great extent.
Would need that too
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05-05-22, 10:50 AM
#10
If you can't find a "complete" system , FIRST find an Evap unit (under dash unjt) and start from there because there are two system types...
Mana & Denso each having different fittings.
To tell which, measure the thread diameter on the small (high press) line where it comes thru the firewall....Mana = 16mm , Denso = 14mm.
When you know which Evap you have then you search for same for the remainder of the system
The only common fittings between Mana & Denso systems are at the compressor.
Usually it is difficult to find a "complete" FD A/C . The other option is an RX8 system but you still need an FD Evap unit to mate an RX8 system to.
Mana & Denso each having different fittings.
To tell which, measure the thread diameter on the small (high press) line where it comes thru the firewall....Mana = 16mm , Denso = 14mm.
When you know which Evap you have then you search for same for the remainder of the system
The only common fittings between Mana & Denso systems are at the compressor.
Usually it is difficult to find a "complete" FD A/C . The other option is an RX8 system but you still need an FD Evap unit to mate an RX8 system to.
05-05-22, 12:56 PM
#11
Denso systems may have different fittings at the compressor as well. Likely the differences is between r12 and 134a systems.
I recently jumbled together a complete RHD Denso r134a system from my parts bins. It was harder than I expected. In the end I handed off the system for C$800. Builder would still have to put it together, replace seals, find some mounting bolts for the compressor and see if it all runs.
I recently jumbled together a complete RHD Denso r134a system from my parts bins. It was harder than I expected. In the end I handed off the system for C$800. Builder would still have to put it together, replace seals, find some mounting bolts for the compressor and see if it all runs.
