Disassembly Of Cylinder Heads - Tecumseh V-twin Technician's Handbook

DISASSEMBLY OF CYLINDER HEADS

Before beginning service of the cylinder head check for
warpage by placing the head on a precision flat surface.
If warped in excess of .005" (.127 mm), replace the head.
Slight warpage can be corrected by placing a sheet of
#400 wet /dry sandpaper on a precision flat surface and
rubbing the head gasket surface in a circular pattern until
the entire gasket surface shows evidence of sanding. A
small amount of honing oil on the sandpaper will make it
easier to slide the head. Always replace the head gasket
and torque the head bolts to specification in 60-inch
pound (6.7 Nm) increments, following the torque
sequence in (Illust. 7-10).
2
5
3
NOTE: When servicing the valves, all carbon should be
removed from the valve head and stem. Before
attempting to remove the valves check that the top of
the stem is free of burrs. If you find burrs or a lip use a
file to break the edge then remove the valve.
7-4
Disassembly of the cylinder heads is best done one at a
time to prevent mixing valves from one head to the other.
Place a shop towel or other similar soft product under
the valve heads to prevent damage. You may remove
the valve spring retainers from the head using a
commercially available valve spring compressor, (Illust.
7-11) or to release the valve keepers from the retainer,
tap the retainer with a 3/4" (19 mm) deepwell socket
and hammer. (Illust. 7-12) Be careful not to strike to hard
which could push the valve head into the surface causing
damage.
4
1
6
7-10
7-11
7-12