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Revotron 1.2T
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F. Cylinder Head Valve Guides :
1. Remove the valve guide oil seals and inspect
the condition and fit of the valve guides in the
cylinder head.
2. Replace the cylinder head when excessive
clearance exists between the guides and the
valve stem or the valve has stuck inside the
guide.
3. Check the valve guide bore in the cylinder
head. If the bore is damaged or out of round,
or damaged, replace the cylinder head.
4. Replace the valve guide oil seals using the
valve guide oil seal drift (2702 5890 06 17)
Valve Guide Specification (Revotron 1.2T)
Dimension
Intake Valve
Exhaust Valve
Valve Guide Bore in Cylinder Head
12.99
(+0.003/-0.010)
12.99
(+0.003/-0.010)
Valve Guide O.D.
Normal : 13.0
(+0.046/+0.028)
Normal 1 : 13.5
(+0.046/+0.028)
Normal : 13.0
(+0.046/+0.028)
Normal 1 : 13.5
(+0.046/+0.028)
Valve Guide I.D.
Normal : 7
(+0.020/+0.005)
Normal 1 : 7
(+0.020/+0.005)
Normal : 7
(+0.020/+0.005)
Normal 1 : 7
(+0.020/+0.005)
Valve Guide Length
39.5 mm
46 mm
Note : Valve Guides and Valve Seats are separately not serviceable. They come along with the cylinder
head as an assembly