Valve Guide; To Clean Carbon Accumulation Off The Valve Guide; Valve Guide Inner Diameter Measurement; Valve Guide Replacement - Carter Talon 150 FX Series Service Manual

VALVE GUIDE

Carbon accumulation of the valve guide will make the valve move roughly, causing the valve to not
open or close properly.
Valve guide abrasion is one of the causes of the exhaust pipe fuming white smoke.

TO CLEAN CARBON ACCUMULATION OFF THE VALVE GUIDE

• Remove the valve and springs etc.
• Clean the carbon accumulation with a valve guide reamer.
Generally, only turn right when using the reamer, and do not
push in or out directly with the reamer.

VALVE GUIDE INNER DIAMETER MEASUREMENT

Calculate the clearance between the valves stem and the valve guide.
(The inner diameter of the guide subtracted by the outer diameter of the valve stem).
Valve
Service Limit
When the abrasion of the valve guide exceeds the service limit, it should be re-
placed; after replacing a new valve guide, the valve retainer must be adjusted.

VALVE GUIDE REPLACEMENT

• Heat the cylinder head to 100 ~ 150°C
The cylinder head must be wholly and quickly heated
to the specific degree, and cannot be heated partly, or
it will cause the cylinder head to distort. The tempera-
ture is very high, two technicians are recommended.
• Tap the valve guide out with a valve guide remover or similar tool.
Service Limit
Inlet valve Exhaust valve
0.08mm 0.10mm
Do not damage the cylinder joint face
5.03mm
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