Toro 500 EFI Service Manual page 52

3. Lubricate the inside wall of the cylinder; then using a
ring compressor or the fingers, compress the rings
and slide the cylinder over the piston. Route the cam
chain up through the cylinder cam chain housing;
then remove the piston holder and seat the cylinder
firmly on the crankcase.
CAUTION
The cylinder should slide on easily. Do not force the cyl-
inder or damage to the piston, rings, cylinder, or crank-
shaft assembly may occur.
4. Loosely install the two nuts securing the cylinder to
the right-side crankcase half.

NOTE: The two cylinder-to-crankcase nuts will be
tightened in step 9.
50
C. Cylinder Head/Camshaft
D. Cylinder Head Cover/Rocker Arms

NOTE: Steps 1-4 in the preceding sub-section must
precede this procedure.
5. While keeping tension on the cam chain, place the
front cam chain guide into the cylinder.
Care should be taken that the bottom of the chain guide
is secured in the crankcase boss.
MD1344
6. Place a new gasket into position on the cylinder.
Place the alignment pins into position; then place the
head assembly into position on the cylinder making
sure the cam chain is routed through the chain cavity.
Keep tension on the cam chain to avoid damaging the
crankcase boss.
GZ142
7. Install the four cylinder head cap screws with wash-
ers. Note that the two cap screws on the right side of
the cylinder head nearest the cam sprocket are longer
than the two cap screws on the left (spark plug) side.
Tighten only until snug.
8. Install the two lower nuts securing the cylinder head
to the cylinder, one in front and one in rear.
9. In a crisscross pattern, tighten the four cylinder head
FI622A
cap screws (from step 7) to 28 ft-lb. Tighten the two
lower cylinder head nuts (from step 8) to 20 ft-lb and
the cylinder-to-crankcase nuts (from step 4) to 8 ft-
lb.
CAUTION
CAUTION
FI621
MD1347