Audi Workshop Service and Repair Manuals

Special tools, testers and auxiliary items

• ◆ Press tool VW 411
• ◆ Hand reamer 3120 and cutting fluid
• ◆ Drift 3360
• ◆ Support 3361

Removing

• ‒ 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.

• ‒ → Set up the support plate as follows:
• ‒ Insert locating pins for cylinder head bolt drillings -A- in holes 2 and 3.
• ‒ Insert pin -B- in the correct hole for the valve angle:
• ‒ Outer inlet valves: 21.5 <°
• ‒ Centre inlet valve: 15 <°
• ‒ Exhaust valves: 20 <°

• ‒ → Press out the worn valve guides using drift 3360 as follows:
• ‒ Valve guides without shoulder:
  from the camshaft side
• ‒ Valve guides with shoulder (repair version):
  from the combustion chamber side

Installing

• ‒ Oil new valve guides. Using drift 3360, press into cold cylinder head from the camshaft side until the shoulder makes contact.

Note:

When the shoulder on the valve guide makes contact, the pressure must not exceed 10 kN (approx. 1.0 t) otherwise the shoulder can break off.

• ‒ Ream guides out with hand reamer 3363 using plenty of cutting fluid.
• ‒ Rework valve seats .
• ‒ Renew valve stem seals => Page 15-69.