22
AeroVee 2.1
Rev Z. 01/14/2015
Sonex Aircraft
LLC
© 2014 All Rights Reserved
Assembly Instructions:
Important: The cylinder heads will contain debris from
machining. You must clean and inspect the cylinder heads
for debris before installing them.
CYLINDER HEAD INSTALLATION
Note: The process of ma-
chining the spark lug holes
for the secondary ignition
often damages neighboring
cooling fins. Missing fins
is normal. You may wish to
sand/file the rough edges to
make them smooth.
__1. Install Push Rods Seals
(from Gasket Set) on
each end of the Push
Rod Tubes. Expand the
bellows end of each
push rod tube slightly.
This will improve the
seal between the push
rod tubes, engine case,
and cylinder heads.
__2. Insert Cylinder Head
Gaskets into Head As-
semblies.
__4. Place washers and retaining nuts (from the head stud
kit) onto the head studs. Tighten in sequence shown
in drawings A and B, below. Torque sequence must be
used to prevent the head from warping.
First Tighten: 7-10 Ft. Lbs.
Final Torque: 18 Ft. Lbs.
__5.
perform this step only
if the cylinder head
has an o-ring recess
at the base of the stud.
Install O-ring (from
Gasket Set) onto the
two head studs that
hold the rocker assem-
bly in place.
1
2
5
Parts Required:
__ Cylinder Head Nuts and Washers, from ACV-P01-86
__ Copper Cylinder Head Gaskets, 0.060 Thick, ACV-P01-92
__ Cylinder Head Assemblies,
(See packing list for part number)
__ Push Rod Tubes, ACV-P06-50
__ Rocker Arm Nuts, (from Valve Cover package)
__ Gasket Set (partial), ACV-P02-15
__3. Align the cylinder head
with the engine studs
and cylinders and then
install the push rod
tubes. Check alignment
of Push Rod Tubes and
barrels as you push
the cylinder head into
place.
Note: "Grooves" in the seat of
the secondary ignition spark
plug hole are normal and
do not impact the seal of the
spark plug washer
