Franklin Oil Bypass

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Revision as of 16:15, 22 November 2011 by Bferrell (talk | contribs) (Created page with "The topic of oil cooling on the Franklin engine comes up quite often. Here are some tips shared on the Reflector. ''The franklin engine I have in my 173LW is running high oi...")
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The topic of oil cooling on the Franklin engine comes up quite often. Here are some tips shared on the Reflector.


The franklin engine I have in my 173LW is running high oil temp, 245+. Having read recent posts, I am planning to install a larger oil cooler with a vernatherm. I would appreciate comments from those who have done this. Is there a modification necessary for the factory oil bypass valve?
 

   Grover  McNair

   N832AB



Grover,

 You still haven't said where you are measuring the oil temp. As PZL memo states, you  should be measuring it at point 7.1, just before the oil return to the engine.� I modified my  plenum by splitting it in two and sealing the base of the cylinders. Now, in Florida's heat,  I can take of and climb to 5000 ft with CHT's remaining below 390 F. and oil temps hovering  between 215 and 220 F. Attached is a PZL bulletin of what Brian is saying.



Click for a larger image.


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