15-29
Valve guides, checking and replacing
Checking
When repairing engines with low compression
due to leaking valves, it is not sufficient to reface
or replace the valve seats and valves. It is also
necessary to check the valve guides for wear.
This is particularly important when checking
engines with high mileage.
- Insert new valve into guide until end of valve
stem is flush with end of guide.
CAUTION!
Due to the difference in valve stem diameters,
make sure that only an intake valve is used to
check intake valve guides, and that only an
exhaust valve is used to check the exhaust
valve guides.
Wear limit - Determine valve rock-amount that valve can move side-to-side.
Intake valve guide 1.0 mm (0.039 in.)Exhaust valve guide 1.3 mm (0.051 in.)
Pa
ge 31 of 35 Lock carrier, removin
g for service
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE01.15.4
