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Servicing valve gear
Renewing valve guides
Special tools, testers and auxiliary items
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◆ Drift 10-206.
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◆ Hand reamer 3120 and cutting fluid.
Note:
When the shoulder on guide makes contact, the pressure must not exceed 1.0 ton otherwise shoulder may break off.
Work sequence
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‒ Clean and check cylinder head. Cylinder heads in which the valve seats can no longer be reworked, or cylinder heads which have already been machined to the minimum dimension, should not have the valve guides replaced.
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‒ Press out worn guides with 10-206 as follows:
Valve guides without shoulder from the camshaft side.
Valve guides with shoulder (repair version) from the combustion chamber side.
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‒ Coat new guides with oil and press in with 10-206 from camshaft side (cylinder head cold) until shoulder makes contact.
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‒ Ream guides out with hand reamer 10-215 using plenty of cutting fluid.
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‒ Rework valve seats .
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