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View Full Version : 4WD Radiator - Is the second radiator always in use?


89MasterAce
05-13-2022, 01:59 PM
Hello all,

So I have the second, horizontal radiator below my AC condenser. Is the second radiator always in use once the thermostat is open? Is there any valving or additional thermostat between the second radiator and the main radiator?
Jean-Claude Van-chan
05-16-2022, 10:05 PM
As far as I know, that second 'horizontal radiator' is the evaporator for you air-con, not a second motor radiator, and they do not share fluids.
89MasterAce
05-16-2022, 10:29 PM
On my van, there is the horizontal AC condenser in the normal place, and directly below it is a second motor radiator. Here is the diagram for the second radiator.
Jean-Claude Van-chan
05-16-2022, 10:43 PM
My learning curve just tipped back to vertical :doh:
Andywear
05-17-2022, 11:39 AM
I drained my whole system from the horizontal one, I feel if there was valving it would not have drained or refilled properly. Make sense?
Doxy
10-28-2022, 01:45 AM
Anymore information on this? I seem to have the second radiator as diagramed but am trying to find out if it runs in series with the main radiator or separate
Headhunter38
12-09-2022, 06:35 PM
On my van, there is the horizontal AC condenser in the normal place, and directly below it is a second motor radiator. Here is the diagram for the second radiator.

Where did you find this diagram? I dont see it anywhere in my BGB or anywhere on toyotaparts.com. I also have a 4wd and theres no second radiator on mine.