18
AeroVee 2.1
Rev Z. 01/14/2015
Sonex Aircraft
LLC
© 2014 All Rights Reserved
CRANK CASE ASSEMBLY
__18. Place one ACV-Z01-28 washer and one ACV-Z01-75
12mm elastic stop nut on each of the six large studs.
do
not tighten the nuts at this time.
Torquing order for the six 12mm nuts. See steps 19 and 21.
__19. In the order shown in the photo above, torque the 6
large nuts to 15 foot-pounds.
__20. Check for free movement of the crankshaft. If interfer-
ence is detected, identify the source of the interference
(most likely poorly seated main or cam bearings).
Note: If the connecting rods are not held near their nor-
mal operating position while checking for interference,
you may experience interference which does not exist
on an assembled engine.
__16. Apply Permatex Avia-
tion Form-A-Gasket #3
or Flange Sealant to the
mating surfaces of the
case halves. Apply ac-
cording to the product
manufacturer's instruc-
tions. Apply sparingly.
__17. Note: While assem-
bling the case halves,
the lifters in the left
half will want to slide
out. This can be mini-
mized by giving them
each a heavy coat of
white lithium grease.
Assemble the two case
halves by placing the
left half over the right
half. Gently tap the left
half with a rubber mal-
let to seat it against the
right half of the case.
__21. In the order shown in the photo, re-torque the 6 large
nuts to 25 foot-pounds.
do not exceed 25 foot-pounds.
__22. Check for free movement of the crankshaft, as described
in step 20.
17
16
3
5
2
4
1
6
18, 19, 21
__25. Install an ACV-Z01-26 washer and ACV-Z01-23 stop
nut on the remaining (10) studs on the perimeter of the
case. Lightly tighten each nut.
There are 10 studs protruding through the case which serve
to join to two case halves. Each must have a washer and nut
installed (inset photo).
__23. Apply Permatex Avia-
tion Form-A-Gasket #3
to two (2) ACV-Z01-26
washers and place them
over the cam shaft
studs the lower left side
of the engine.
__24. Install an ACV-Z01-23
stop nut on each cam
shaft stud and lightly
tighten.
The cam shaft studs (A).
23, 24
A
25
