Background: RV-9A with an ECI O320 first flown in May 2008
I noticed 2 cracks in my #4 cylinder baffle at about the 200 hour mark. The cracks appeared to begin at the widest part of the nutplates where they contacted the inside radius of the aluminum baffle. Subsequent inspection also revealed a tear in the left aft case baffle where it wraps around the bottom of the cylinder barrel. I marked the progression of the cracks over the next 100 hours with a black Sharpie, visible in the photos below.
Working with Vans Engineering and Parts dept, I ordered the following parts:
CB906A left aft case baffle
CB705A aft baffle #4
CB705B oil cooler brace
CB1004A cylinder 4 baffle
CB1004C stiffener
CB1003C doubler
CB1004B doubler
FF709 doubler
FF713 spacer, oil cooler
CB706B spacer, make from AT6-058x3/8
MS?????-4 steel lock nut
OP-44 drawings
Note many of the part numbers are the new design parts and a few are RV10 pieces. The new "revision C" baffles fit the engine like a glove and are also a different aluminum alloy from both prior designs. The new parts are 5xxx series aluminum. The drawings are also RV-10 style isometric view with instructions on the same sheet. I chose to stick with the "safety wire inside the tube" method to tie the cylinder fore/aft cylinder wraps together. New design uses bent and threaded rods for that purpose.
Here's a few pics of the process:
http://s871.photobucket.com/albums/ab273/Stephenf26/
Total time: 16 hours
Total cost: $65.00
I noticed 2 cracks in my #4 cylinder baffle at about the 200 hour mark. The cracks appeared to begin at the widest part of the nutplates where they contacted the inside radius of the aluminum baffle. Subsequent inspection also revealed a tear in the left aft case baffle where it wraps around the bottom of the cylinder barrel. I marked the progression of the cracks over the next 100 hours with a black Sharpie, visible in the photos below.
Working with Vans Engineering and Parts dept, I ordered the following parts:
CB906A left aft case baffle
CB705A aft baffle #4
CB705B oil cooler brace
CB1004A cylinder 4 baffle
CB1004C stiffener
CB1003C doubler
CB1004B doubler
FF709 doubler
FF713 spacer, oil cooler
CB706B spacer, make from AT6-058x3/8
MS?????-4 steel lock nut
OP-44 drawings
Note many of the part numbers are the new design parts and a few are RV10 pieces. The new "revision C" baffles fit the engine like a glove and are also a different aluminum alloy from both prior designs. The new parts are 5xxx series aluminum. The drawings are also RV-10 style isometric view with instructions on the same sheet. I chose to stick with the "safety wire inside the tube" method to tie the cylinder fore/aft cylinder wraps together. New design uses bent and threaded rods for that purpose.
Here's a few pics of the process:
http://s871.photobucket.com/albums/ab273/Stephenf26/
Total time: 16 hours
Total cost: $65.00
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