I installed an oil cooler fan, ahead of the upcoming Houston summer. I hope it will help dissipate engine heat in rush hour traffic and at stop lights. I chose a 5” square computer fan, 1” thick. I placed it behind the oil cooler, between the cooler and the oil cooler bracket. I wired it into the ACC relay, so it always runs when the engine is on.



I had a lost power incident on a recent trip to Florida. After 1 hr on the freeway in 85 F weather, cruising at 72 mph, I had restricted power above ¼ throttle, and a CEL. This went away after the engine cooled down. I inspected the oil cooler, and found it half restricted due to bent fins. I straightened the fins, added an oil cooler guard, and added the fan. I will let the board know how it works out over the summer, and if the fan survives or dies.

 

cool, i had a guage on my fd, it can use a fan, anything under 20mph and the guage would slowly peg

 

That is what I was thinking when I installed it, j9fd3s!



No speed = no oil cooling. When the warranty is up, I will add a BIG accessory oil cooler in front of the condenser, like the truck/towing crowd does. Mazda did design in enough condenser and radiator area. I wonder why they failed so badly on the oil cooler area.



The little fan does push a lot of hot air out of the cooler at a stop, as I can feel the hot air push at the inner fender cover vent panel. The fan has survived direct spray from a hose, and a typical Houston tropical downpour so far. I placed the fan behind the cooler, with the blade to body gap facing away from the cooler. If the fan survives, I will post photos. If the fan does not survive, I will buy the waterproof type, but they are 10X cost



I just checked on the fan, still running. Those little fans are tougher than you might think

 

the stick cars have tons of cooling, theres 2 coolers.



um if its pushing hard at the inner fender, maybe a hole or 2 would be helpful? doesnt take much airflow to cool it at a stop though

 

Also something you may want to consider.

On your next oil change add about a quart of Tx-7.

It's $20 for a quart but knocked off 20 deg off my oil temp.

When I mean temp I shot the oil cooler witha IR temp sensor and before it read 235. After the change it dropped to 205

Auto with a single cooler that lived in Phx.



http://www.polydyn.com/tx7.htm



BTW I'm NOT affiliated with PolyDyn