Hello,

I been cruising all the forums without any luck. I have a S4 engine out of the car. The LIM is removed from the engine, with the sleeves, rods, and actuators all cleaned. I have a couple of questions regarding the 5th 6th port Actuator system:

a) with 3 PSI applied the Actuators plunge inward. Is this correct? I wonder if the previous owner installed S5 actuators on this S4 engine.

b) under 3 PSI applied the the Actuators plunge fully in. But when pressure is released they do not travel back to the resting stop - approximlely 3/8" short of the resting stop. I am thinking weak springs in the Actuators, I am wondering if anyone in the community has any tricks on how to get full motion (too bad these Actuators don't come apart).

Thanks all!

 

Okay, I figured out why the actuator was not returning to the resting stop:

The O-ring I installed on the assembly shaft (the one below the C-clip, and the washer) was too big and tight - creating too much resistance for the Actuator diaphragm to return.

Well, now I need to find a different O-ring to swap out this problem O-ring.