Replacing The Valve Guides - Skoda OCTAVIA MK1 Service Manual

Insert valve into guide. End of valve stem must
–
be flush with guide.
– Determine valve rock.
Wear limit
Inlet valve
1.0 mm
Note
If the wear limit is exceeded, repeat measurement with new valves. If the wear limit is again exceeded,
t
replace valve guide.
t If the valve is replaced when carrying out repair work, use a new valve for the measurement.

Replacing the valve guides

Special tools and workshop equipment required
t Driver - MP 1-205-
t Reamer - MP 1-204- and diluted soluble oil
Removing
Clean the cylinder head and check it. Heads whose valve seat rings can no longer be
–
reworked or cylinder heads which have already been machined down to their minimum
dimension are unsuitable for replacing the valve guides.
Press out worn valve guides with -MP 1-205- from the camshaft side (valve guides with
–
guides with a collar requiring repair from the combustion chamber side).
Install
Press the new guides which have been wetted with oil into the cold cylinder head using the
–
driver -MP 1-205-, from the camshaft side up to the collar.
Note
Once the guide has been pressed against the collar then the pressing in pressure should not
be increased above 10 kN since otherwise the collar can break off.
– Ream the valve guides using the hand broach -MP 1-204-. It is essential to use dilute
Exhaust valve
1.3 mm
80