Inspect And Grind Valves - Volkswagen Taro 1989 Workshop Manual

(e) Select a new valve guide bushing.
Bushing boredlameter
13 000
-
13.027. Standardsize
Bushing bore diameter
>
13 027 0 05 Oversize
if the bushing bore diameter of the cylinder head is more than
13 027 mm, machine the bore to the foilowlng dimenstons
Rebored cylinder head bushing bore dimension
13 050
-
13.077 mm
If the bush bore diameter of the cyimder head exceeds
13 077 mm, replace the cylinder head
(Q
Gradually heat the cylinder head to 80
-
100°C
(g) Using
SST
and a hammer, tap in a new valve gulde bush
until the snap ring (1) makes contact with the cylinder head.
SST 09201 6001 1
(h) Using a sharp 8 mm reamer, ream the vaive gutde bush
to obtain the standard specii~ed clearance (See page 28)
between the valve gulde bush and
new
vaive stem
11.
inspect and grind valves
(a) Grind the vaive only enough to remove pits and carbon
(b) Check that thevaive is ground to the correct valve face
angle
Valve face angle
44 5'
(c) Check the valve head margin thlckness (2)
Standard margin thlckness
Intake
1 0
-
1.4 mm
Exhaust
1 3
-
1 7 mm
Mrlmum margm thickness
intake 0
5
mm
Exhaust 0 8 mm
If the valve head margin thickness a less than mlnimum, replace
the valve