86560SEL, replacement of the green O-rings is straightforward. Unplug the wire, remove the 2 screws securing the EHA valve, replace the old O-rings, and reinstall in the reverse order.

The fuel system is pressurized and gas will spray out when you remove the screws unless you pull the fuel pump relay and start the engine to relieve the system pressure. Otherwise, simply use a rag to soak up the leaking gas and proceed to replace the O-rings.

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Fred Hoelzle