Service Manual

G210–2&G210–4CylinderHeadRockerArmComponentsInspection
1.Cleanandinspecttherockerarmnuts,pivotnuts,rockerarms,andvalve
rotatorsfordamage.Replacetherockerarmassemblyifcomponentsare
damaged.
2.Inspecttherockerarmmountingstudsfordamage.Replacetherockerarm
assemblyiftherockerarmmountingstudsaredamaged.
3.Cleanandinspecttheguideplate.Replacetheguideplateifcracked,worn,
orbent.
G210–2&G210–4CylinderHeadValveSeatInspection
1.Thoroughlycleanthecylinderheadtoremovecarbondeposits.
2.Inspectthevalveseatsforlooseseat,propervalvefacecontact,andproper
seatwidth.
G210–2&G210–4ValveFaceContactTest
1.ApplyalightcoatofPrussianBlueorerasableinktothevalveface.
2.Insertthevalve,liftthevalveandsnapitclosedagainsttheseatseveral
times.
Note:Verifythevalvedoesnotrotateontheseat.
3.Inspectthetransferredmarkingcompoundforanyareaoftheseatthatis
notconcentric.
Standard:0.8mm(0.0315inch)
ServiceLimit:2.0mm(0.0787inch)
g338826
Figure172
4.Ifvalveseatisfoundoutofspecication,attempttoreconditionthevalve
seat.G210–1ValveSeatReconditioning(page7–14).Ifunabletocorrect
withreconditioning,replacethecylinderheadassembly.
5.Repeattheprocedureonallvalvesandseats.
G210–2&G210–4ValveGuideInspection
1.Measureandverifytheinsidediameterofthevalveguideistospecication.
Replacethecylinderheadassemblyisoutofspecication.
InsideDiameter(IntakeandExhaust)Standard:5.500mm(0.2165inch)
CompressionSystem:ServiceandRepairs
Page7–28
G210EngineServiceManual
3439-732RevA