944 S L4-2479cc 2.5L DOHC (1987)
Valve Spring: Testing and Inspection
Checking and adjusting installation length of valve springs
Note: When selecting the valve spring seat (own construction) always ensure that the valve spring seat is 2.0 + 0.2 mm thick.
Tool (own construction)
Valve spring Sp No.944.105.467.03
Auxiliary spring Sp No.928.107.171.01
1.
Machine a recess of approx. 10 mm width into valve-spring seat. Only install valve- spring seat for measurement.
2.
Shorten the auxiliary spring to approx. 50 mm to ease assembly.
3.
Install valve and hold in valve seat. Insert washer, valve-spring seat, auxiliary spring and valve-spring seat with machined recess.
4.
Use Special Tool 9242 to fit the conical valve keepers.
5.
Using a depth gauge, measure from the top surface of the valve-spring seat, vertically downwards through the recess to the outer spring contact
surface.