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I'm really concerned about the evap core in the current installation. First, it just failed, as did Dave's Setrab (rated up to 232 psi). How many other non-Mazda oil coolers have failed?
If the car is sitting in the sun on a hot day, not running, the entire A/C system will see 170 psi, perhaps more in the tropics. Conversely, when the A/C is running, the condenser will see as much as 340 psi, but the condenser will be at about 15 psi.
The "big book" says to use the stock oil Mazda cooler. It does not appear to be overly heavy or bulky. It has been proven to work. What would be the motivation to use something different? Maybe I've missed some important point.
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