Variocam Actuator Testing.

[j911brick]

Is there any way to bench test a variocam actuator? i would like to test mine before spending the big bucks on a new one.

[JFP in PA]

Originally Posted by j911brick

Is there any way to bench test a variocam actuator? i would like to test mine before spending the big bucks on a new one.

The easies, and perhaps best method, to test the VarioCam units is in the car with either the Durametric software or a PIWIS system. One click of the mouse and you will know.

[j911brick]

Originally Posted by JFP in PA

The easies, and perhaps best method, to test the VarioCam units is in the car with either the Durametric software or a PIWIS system. One click of the mouse and you will know.

Yes, but unfortunately there are other factors that can cause it not to work. The other option would be to test the circuit. Can that be tested with a noid light?

[JFP in PA]

Originally Posted by j911brick

Yes, but unfortunately there are other factors that can cause it not to work. The other option would be to test the circuit. Can that be tested with a noid light?

We test them in place with a Porsche diagnostic tool; takes about 30 seconds to determine if and what is bad.

[j911brick]

Originally Posted by JFP in PA

We test them in place with a Porsche diagnostic tool; takes about 30 seconds to determine if and what is bad.

Really, my friend that is a master Porsche tech says the PIWIS wont even do that. What do you use?

[JFP in PA]

Originally Posted by j911brick

Really, my friend that is a master Porsche tech says the PIWIS wont even do that. What do you use?

Then your friend needs to go back to school; both the PIWIS and the Durametric system can activate the VarioCam units, one at a time so you can see the unit's response in the real time cam angle data. You would also note a significant change is the vehicle's idle when the cam moves as well.

[j911brick]

I just put voltage directly to the actuator while it was running and there was no change. I tested the solenoid when I had it out. I just find it hard to believe that two diffent actuators would give me the same cam deviation results. Especially since the pads were worn off one and the intake cam had skipped a tooth. I have access to a third one and may have to bite the bullet and try that.

[j911brick]

I rounded up a third actuator. When I took it apart I noticed the solenoid plunger was in upside down. Now to put it all back together and try again.

[j911brick]

Looks like I got it nailed this time. Check engine light out and running smooth.

[Gelbster]

Interesting that the solenoid plunger was upside down. There certainly isn't a Durametric test for that. But it seems you had other severe problems - timing chain skipped a tooth and excessive pad wear. Cumulatively that is a lot of issues.!