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Valve springs
To change the valve springs (with cylinder head fitted) Operation 3-8
Special requirements
Note: Steps 1 to 12 refer to a change of valve springs for a single cylinder.
Warning! Wear eye protection during this operation.
1 Remove the rocker cover, see Operation 3-1.
2 Rotate the crankshaft in the normal direction of rotation until the inlet valve of the relevant cylinder has just
opened and the exhaust valve has not fully closed. In this position the piston will be at approximately top dead
centre (TDC).
3 Remove the rocker assembly, see Operation 3-3.
4 Fit the valve spring compressor (A1) and the relevant adaptor (A2 or A3).
5 Compress the valve spring and remove the collets. Ensure that the valve spring is compressed squarely or
damage to the valve stem can occur.
Caution: Do not rotate the crankshaft while the valve springs are removed.
6 Release the valve spring compressor and remove the valve spring caps and valve spring.
Caution: The outer diameter of the exhaust valve guide is 1 mm larger than the inlet valve guide. To prevent
leakage past the inlet valve stem it is important that the larger exhaust valve seal is not fitted onto the inlet
guide. The seals have a colour code for identification.
7 Fit new valve stem seals on the valve guides. Ensure that the brown seal is fitted to the exhaust valve and
the green seal is fitted to the inlet valves.
8 Put the new valve springs in position.
Continued
Special tools
Description Part number Description Part number
Valve spring compressor 21825666
Setscrew adaptor used with 21825666 21825932
Stud adaptor used with 21825666 21825931
1
3
2
A A0051
3
Workshop Manual, TPD 1350E, Issue 4 49