ORIGINAL: gordonhmc
Hi Guys
As far as the surface on the engine being perfect it is anything but what I did was flat file the flange, it only took a few stokes and it was looking good but put a rag or something in the exaust port so filings dont get in there.
Wish I had time to fly that much only once a week for me the field is 50 miles from my house.
Gordon
In Sunny Seattle for a day
My bolts had quite a bit of oily gunk on them. I cleaned the bolt holes and bolts with a pipe cleaner brush and paint thinner. A cleaner thread should lock better with the red silicone.
The exhaust port on my engine was also a bit rough. Header flange too. I just block sanded with 400-600 to a smooth finish. Should work fine but we'll see