Fuel Filter: Service and Repair

Renewing Fuel Filter





- Remove bolt (74).
- Remove O-ring (76) and replace.
- Remove O-ring (77) and replace.
- Remove filter (42) from the bottom and replace.
- Install in reverse order.

Note: The fuel system is self-bleeding during starting. This is due to the increased delivery rate of the fuel pump, the restrictors in the filter upper part (73), and the injection pump.

- Run engine and check for leaks.

Engines 602.962, 603.960/963/971
Fuel filter modified. Standard filter box for end line pump and distributor pump.

Production Breakpoint: as of March 1994

Model Engine Engine end no. Engine end no.
Manual trans Auto. trans
124.128/188 602.962 031443 019673
124.133/193 603.960 -- 051149
124.333/393 603.963 -- 004341
140.134 603.971 -- 009864