Oil cooler nutplate hitting cylinder fin

[BigglesRV7A]

Bob,

One other piece of advice if you're not already aware of it is to install washers both ends of the spacer tubing running between the oil cooler flanges. (washers to be installed in the inside flanges of oil cooler) If you don't install these, you run the risk of having these flanges break off as documented by Dan Checkoway some time ago. Installing washers here will spread the load across the flange and seems to prevent fatigue cracking of the flange over time.

Cheers and good luck,

Greg (RV-7A IOF-360, WW200RV)

[Bill Dicus]

From a totally ignorant guy, why not just grind a little cooling fin away to prevent interference. Have seen this done a lot on motorcycles. Does this create a stress riser? Can't imagine this would have a serious effect on cooling?.Or am I missing something.?