There is no sensor/meter in the car to measure oil temp. I originally had a 1982 oil cooler (12A) that has the same external dimensions as the 2nd gen, but is less effective and may not have internal turbulators. I was fighting high oil temp problems for four years until I finally put in the 1986 cooler. I still see oil temp go over 210 into the engine when the outside air temps are above 80F. Below that I can usually climb full power to >10kft. Above 80F I have to throttle back and climb at a slower rate after the first 2-3kft. Oil temps can still go to 225 or 230 in that case, but it's only for short periods. After getting to altitude and leveling off it will drop back below 210. Note that I'm still having marginal oil temps in hot weather while only producing around 120 HP NA at only 5200 RPM. So I'm amazed when others producing much more power are able to keep oil temp below 210 with just a single Mazda oil cooler.

Years ago I measured the oil temp in the pan in my car, it would easily go over 250 just driving around town. Which makes me think the oil temp easily exceeds 210 into the engine in the car, because driving around town at 30 or 40 mph can't be pushing too much air through the oil cooler. At some point maybe I'll measure the oil temp in the car going into the engine and get more data.

Steve Brooks wrote:

John,

I’m interested to see what your oil temperature is.  I’m surprised that you didn’t find that issue with measuring water temperature instead of oil when I found that mine was wrong.   At first, I thought that my oil temperature was about 185 F, which was less than my coolant temperature (measured at the water pump).  When I moved the oil temperature sensor so it was measuring oil, I found that it was about 30 degrees F hotter than I had previously thought. 

 

Who would have thought that the temperature sensor 1” away from the oil pressure sensor would be coolant ?

 

Regards,

Steve Brooks 

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of John Slade
Sent: Tuesday, September 07, 2004 9:32 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: high oil pressure and coolers

 

>How many people are running stock 2nd or 3rd gen coolers, and have temps under 210?  

I'm running two 3rd gen coolers. I'm not sure of the temps yet, but nothing broke (inside the engine that is) in 8 hrs of flying with some fairly high power settings.

 

John