Tracker Off-Road 800SX Service Manual page 82

MF029A
MF030
17. Remove the intake manifold from the cylinder head.
MOD603
INSPECTING AND SERVICING
CYLINDER HEAD
NOTE: It is recommended that all cylinder head

repairs including valve grinding, seat replacement/
surfacing, valve guide replacement, and surface plane
procedures be accomplished by a qualified machine
shop equipped to service aluminum cylinder heads.
1. Using a suitable straight edge and feeler gauge,
check the cylinder head surface for flatness as
shown. If measurement is greater than 0.08 mm
(0.003 in.), the cylinder head must be resurfaced or
replaced.
2. Being careful not to scratch or gouge the aluminum
head, use a suitable soft wire brush to clean carbon
deposits from combustion chambers and from
around valve heads.
80
3. Use a suitable valve spring compressor, compress the
valve spring (A); then depress the sleeve (B) to
release the collets (C).
MF164A
4. Remove the collets (C) from the valve stem; then
release the spring compressor and account for valve
spring (A), sleeve (B), valve spring retainer (D),
valve stem seal (E), valve spring seat washer (F), and
valve (G).
MF148A
NOTE: Always mark or index all cylinder head

components as to the location they were removed
from. Failure to do so could result in unnecessary
adjustments or accelerated wear due to mismatched
wear surfaces.
5. Inspect valve seats for cracks, burn tracks, pitting,
and security in head.
6. Using a micrometer, check the valve stem diameter;
then check valve heads for excessive wear, discolor-
ation, burning, or warpage.
DE319