Originally Posted by Steve Ashby
I am just finishing up my baffles, with the oil cooler mounted thereon (RV-8A). I would be happy to mount it elsewhere, if that is better. What say you?
As others have pointed out, cracking of the baffle behind #4 cylinder with the oil cooler mounted there is pretty common. I purchased my first RV-8 with about 122 hours on it. The baffle cracked around 400 hours or so, IIRC. When we repaired it we also put in an extruded AL angle. The baffle has not cracked since, and that RV-8 now has 2,200+ hours on it.
I bought my current RV-8 with about 208 hours on it, and shortly after I bought it the baffle cracked on that one too. It has a brace between the engine case the baffle behind cylinder #4, but that didn't prevent the baffle from cracking. So we repaired it with the same AL angle fix, just as we did with my previous RV-8. So far so good, and I expect no cracking going forward.
Below are some pics from current RV-8.
Neither of my RV-8s have any problem with oil cooling. In fact, both need to have the the front of the oil cooler partially or fully closed off in the Winter to keep the oil temps up. Both RV-8s have parallel valve IO-360s, but my previous RV-8 has 10:1 high compression pistons. Both have Hartzell CS props.
I'm surprised Van's hasn't fixed that detail in the design yet (well, maybe not surprised since the RV-8s, 7s, 6s, 4s are older models)!
(Oh, and "Skookum
" is a technical term!