seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Valve guides: verification > < Servicing valve gear
Cylinder head, camshaft - component overview
Cylinder head, camshaft - component overview
t  Valve dimensions → Fig.
   
1 - 50 Nm + 1/4 turn (180º)
q   Use locking spanner -T20018B- to loosen and tighten → Fig.
2 - Camshaft pulley
q   The notched belt must be removed prior to dismounting or installing → Chapter
q   Remove with extractor -T20119A- → Fig.
3 - Oil seal
q   Renewing → Chapter.
4 - Cylinder head
5 - Valve guide
q   check → Chapter
6 - Valve stem seal
q   Renewing → Chapter.
7 - Valve spring
8 - Valve plate spring
9 - Woodruff keys
10 - Hydraulic tappets
q   Do not mix up:
q   Oil sliding surfaces
11 - Woodruff key
Check that it is seated securely
12 - Exhaust camshaft
q   removing and installing → Chapter
q   Check radial play with Plastigage plastic gauge (with tappets dismounted)
l  Wear limit: 0.1 mm
q   Max axial clearance. 0.17 mm
q   out-of-true: max. 0.035 mm
13 - Frame
q   With integrated camshaft bearings.
q   Clean sealing surface; machining not permitted
q   Remove any remaining sealant
14 - 8 Nm +1/4 turn further (90º)
15 - Variable timing control
q   removing and installing → Chapter
16 - 20 Nm + 1/8 turn (45º)
17 - Inlet camshaft
q   removing and installing → Chapter
q   Check radial play with Plastigage plastic gauge (with tappets dismounted)
l  Wear limit: 0.1 mm
q   Max axial clearance. 0.17 mm
q   out-of-true: max. 0.035 mm
18 - Chain tensioner
q   Before dismounting, check using the bolt tensioner -T10092-
19 - Control chain
q   Check for wear.
q   removing and installing → Chapter
20 - 10 Nm
21 - 10 Nm
22 - Hall sender -G40-
23 - Outlet valve
q   Do not rework. Only lapping in is permitted.
q   Valve dimensions → Fig.
q   Checking valve guides → Chapter
24 - Inlet valve
q   Do not rework. Only lapping in is permitted.
q   Valve dimensions → Fig.
q   Checking valve guides → Chapter
25 - Cap
q   replace
q   To dismount when the frame is fitted, use an awl to prise off the cover
q   Installing: Do not use sealant, fit flush

   
Valve dimensions
  Note
Inlet and exhaust valves must not be reworked. They may only be grinded.
  A15-0326
Dim.Inlet valveOutlet valve
Ø amm33.75 ... 33.9527.90 ... 28.10
Ø bmm5.985.96
cmm103.97101.87
α∠°4545

   

Valve guides: verification > < Servicing valve gear