VIS motor fault question

[vitesse]

Originally Posted by john116

Simon, have removed the power VIS motor, and as per your advice above the motor peg is in about the 9 o'clock position. Also, TOAF confirms this motor has died (not the balance motor as I incorrectly stated before). However, the other thing is that the linkage is VERY loose and rattly. No wonder it's making so much noise. Guess I need a new manifold (but why it is faulty after only 70,000kms, I don't know?) Age? Anyone have a spare one?

Just try and put up with it for the time being, there are two modifications in the pipeline that I’ve heard of and considering the cost of a new one, waiting seems to be the best bet. Secondhand ones might soon fail and unless you can find one locally then I imagine postage to be very expensive.

Why it has failed? Don't really know but would hazard a guess that if the car had been used for an extended time with a dead power motor seized in the closed position, then at high revs the volume of air might have forced the flaps open.

And don’t bother trying the Chinese V6 manifolds, they look identical but a local member bought one in China and tried, unsuccessfully to fit it, sadly I never heard why it didn’t fit.

Regards

[stocktake]

John,
it is possible a working power vis will subdue the noise on a worn manifold to an extent. worth trying if you have a working one.

[john116]

A new motor for the moment has fixed the rattle noise. The old motor appeared to be jammed and had stripped the nylon gear.

[stocktake]

Always nice when somebody comes back and reports an outcome. What will happen is the Vis motor will push or pull the flaps to the full extent of their travel and hence take up any slack in the joints. When the motor fails and the arm is midway then the flaps tend to be able to blow in the wind so to speak. Glad to have been of help