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Oil pump mounting bolts - size?

Discussion of the Aerovee kit engine.
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Oil pump mounting bolts - size?

Postby Bryan Cotton » Mon Dec 05, 2022 11:34 pm

Hey all,
I want to make sure I get the proper Gene Berg pressure relief cover. One of the ways they distinguish between oil pumps is 6mm vs 8mm mount bolts. Can anybody with an unassembled Aerovee check for me? They have 13mm heads so I'm guessing 8mm but would appreciate confirmation.
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Re: Oil pump mounting bolts - size?

Postby Area 51% » Tue Dec 06, 2022 7:51 am

8mm...........
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Re: Oil pump mounting bolts - size?

Postby Bryan Cotton » Tue Dec 06, 2022 10:22 am

Thanks!
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Bryan Cotton
 
Posts: 5491
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77
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Re: Oil pump mounting bolts - size?

Postby Murray Parr » Tue Dec 06, 2022 3:46 pm

The head size is usually 150% of the bolt size so yours is most likely 8mm
Murray Parr
WXB0015
Rotax 912ULS
MGL Explorer Lite
First flight May 6/23
RV9 builder (Sold)
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Re: Oil pump mounting bolts - size?

Postby Bryan Cotton » Sat Dec 17, 2022 2:38 pm

Another question for the group. Do we have 26mm gears or 30mm gears? From what I've read the measurement is the height of the gears, so the diameter is the same. If somebody has a pump that is not installed yet can you measure it for me?

Thanks,
Bryan
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
User avatar
Bryan Cotton
 
Posts: 5491
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77
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Re: Oil pump mounting bolts - size?

Postby Area 51% » Sat Dec 17, 2022 3:02 pm

Mine are 26mm.
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