Rotax Rick As long as the seal contact area is good, this crankshaft can be completely rebuilt. I would replace everything except for the 4 throws & the center steel gear. That includes the crank pins. They're the wrist pins on the bottom. When I'm done with it, it's better than a new one with my double slotted oil feed connecting rods.
Rotax Rick. The largest cause for a 582 to fail is a bearing fails. Main & rod bearings. WHY They don't get enough oil. I highly recommend 40 to 1 ratio. We open up the oil feed ports to get more oil to the outer bearings. Also the advantage to a polymer bearing , 4 out of 5 don't lock the engine up like a steel ball spacing bearing would.
Hi John you mentioned the engine should have had an inspection at 5 years. Is there a requirement in the Rotax Manual for an inspection based on calendar time? I wasn’t aware of it. Thanks
Hi Kevin, the general engine overhaul at 300 hours or 5 years is in the Rotax Maintenance Manual. Please reference MML_582-UL-Series, latest published on Feb 1 2019 Edition 1 Rev. 1. The Maintenance Schedule begins at 05-20-00 page 8, item 20, 05-20-00 page 12 contains “general overhaul of engine” marked at 300 hours with X(2. The (2 asterisk statement is at the end of the section. That statement reads “to be carried out every 5 years or 300 hours whatever comes first”
The middle oil seals, gear and bearings of the 582UL aviation crankshaft are not to be serviced. If there’s an issue in that area, the crankshaft must be replaced. However the two PTO and two MAG end bearings are replaceable.
I'm considering an ultralight with an at least 20 year old 582 engine with supposedly 207 operating hours . It could have been out of operation for 5 years or more, sitting in a hangar with the wings off. Should I assume that the engine needs a complete rebuild with a new crank?
@B Tenold I'm in Denmark, in Nothern Europe. We have stricter rules. Written tests are the same as for GA, a medical is required. Only the aircraft itself is 1000 lbs max gross and can mostly be serviced by anyone.
These crankshaft bearings failed due to corrosion as I stated. Low hours of usage and high years is an invitation for corrosion. Following the engine preservation procedure (fogging) likely would have prevented this. Regards John
