Engine Inspection - Westerbeke 8.0KW-60Hz Service Manual

ENGINE INSPECTION
CYLINDER HEAD'AND VALVE MECHANISM
1.
Cylinilei:'
head.
Usil1g a
he~vy
accurate straight edge and
a feeler gauge, check the bottoril face for warpage in three
positions; lengthwise, two crosswise and two widthwise as
shown in the ilfustration. If warpage exceeds the limit,
refaee. ihe bottom face with a surface grinder.
INSPECTFO
.. WEAR AND
CONTACT
CHECK ENDS
FOR WEAR
AND DAMAGE
CHECK
THREADS
CHECK OIL HOLES FOR CLOGGING
' " CHECK FOR
WEAR . . .. ' .
IN BORE .
€.\l.'~-INlfpEl:TFOR WEAR
INSPECT FOR.
INSPECT AND .
TEST SPRING
CLOGGED OIL HOLES
-INSIPECT FOR CRAcKS, OIL
(iUU,lAIV
I
LEAKS. CLEAN
OFF SCALE AND CARBON
DEPOSITS
CHECK FOR GALLING
AND WEAR
k _ _ -INSPECT FOR RIDGES
. ORDAMAGE
~---INSPECT
FOR BEND
WARPAGE - CYLINDER HEAD IiOTTOM FACE
STANDARD 0.0020 In (0.05mm) MAXIMUM
LIMIT' 0.00391n ((0.10mm)
~INSI~EClr~N~ THE
CYLINDER HEAD
BOnDMFDR
WARPAGE'
2. Rocker arms
IIDd
rockershaft. Measure the bpre in the
roclier arm for the rocker shaft and the di!lljJ.eter of the
. rocker shaft to find the clearanee between the arm and the
shaft. If
the clearan~e has reached the limit, replace the
rocker arm. If it exceeds the limit, replace both arm and
shaft.
BORE IN ROCKER ARM FOR SHAFT
STANDARD 0.74449 - 0.74527 In (18.910 -18.930mm)
DIAMETER OF SHAFT FOR ARM
STANDARD 0.74331 - 0.74401 In (18.880 -18.898mm)
CLEARANCE BETWEEN ROCKER ARM AND SHAFT
STANDARD 0.00047 - 0.00197 in (0.012 - 0.050mm)
LIMIT 0.00787 (0.200mmr
MEASURING ROCKER ARMS
AND ROCKER SHAFT
Engines
&
Generators
16