Quote:
Originally Posted by blue62
If you are attempting to isolate a sound.
Use an automotive stethoscope, or a length of hose.
Hold one end of the hose to your ear then move the other end of the hose around the engine to locate the sound.
Ok I know access can be difficult.
Also if it only happens at certain RPM's then you need a helper.
But it is actually very effective.
If the sound is Vario Cam chain,pad related you should be able to isolate the sound to which bank it is without to much trouble.
Looking at your Cam angles it is showing a 25 Degree change at change over.
25 Degree change in Cam angle when the VarioCam actuator triggers is spot on.
I forget what RPM that is supposed to happen but somewhere around 1500 RPM is when they kick in. Then back out at around 5500 RPM.
|
This is a good idea, I am going to give it a try if I can locate a helper.. would be nice to see if it is bank 1 or 2. Bank 2 has the big deviation, but it sounds like it is coming from bank 1.
Also,
Quote:
Originally Posted by blue62
25 Degree change in Cam angle when the VarioCam actuator triggers is spot on.
|
Do you know if I would expect these numbers to be off more if pads had been compromised / deteriorated badly or is just telling me that the actuators themselves are doing their jobs cleanly?