Valve Guide: Service and Repair

Valve guides, replacing

Special tools and equipment
^ VW411 punch
^ 3120 reamer (7mm) and cutting fluid
^ 3360 driver
^ 3361 press-in pad

Removing
^ Clean cylinder head and check.

Note: Cylinder heads with valve seats that cannot be refaced or cylinder heads that have been resurfaced to the minimum dimension are not suited for valve guide replacement.





^ Insert 3361 press-in pad as follows:
^ Install mounting pins for cylinder head bolt holes -A- into threaded hole position -2- and -3-.
^ Install pin -B- into relevant hole for valve angle.
- Outer intake valves: 21.5°
- Center intake valve: 15°
- Exhaust valves: 20°





^ Using 3360 driver, press out worn valve guides as follows:
Valve guide without collar: from camshaft side
Valve guide with collar (replacement valve guide): from combustion chamber side

Installing
^ Using 3360 driver, press new, oiled valve guides from camshaft side to collar into cold cylinder head.

Note: After valve guide with collar is seated, insertion pressure may not exceed 10 kN (2248 lbs. approximately 1.0t), as collar may break off

^ Using 3363 reamer -7 mm, ream valve guide. Use cutting fluid.
^ Reface valve seats, Refer to Valve Seat, Service and Repair
^ Replace valve stem oil seals, Refer to Seals and Gaskets, Engine, Valve Guide Seal, Service and Repair

WARNING!
^ Valves must not be refaced by cutting or grinding.
^ Only hand lapping is permitted.

WARNING!
^ Sodium-filled exhaust valves must not be scrapped without first being properly treated.
^ The valves must be cut open using a hacksaw, by hand, between the valve head and the middle of the stem.
^ The valves must not come into any contact with water while being cut.
^ After cutting open the valves, throw not more than 10 at a time into a bucket of water and step back. A sudden chemical reaction will occur during which the sodium filling is consumed.
^ Valves that have been treated in this way can be disposed of as normal waste.