Intake manifold rattle

[Rsnail]

Thing is for me, I want to repair them on my own and then isolate them properly from the oil that might be getting inside them, but I like repairing stuff on my own and that's why I want to do it, hence my question where I can find the small DC motors, or if one that smoked a little would still be repairable.

[Geoff130]

Has fixing the vis motors stopped the rattle?

[Rsnail]

Yes, fixing the VIS power valve stopped the rattle because the linkage arm from the butterfly valves was moving as it should had. Now I have to refit the balance one too, turns out the pcb board was interrupted at another connection, almost invisible, that's why the motor only turned one way and than smoke came out of it, resoldered the connection, put some voltage on the motor and it was all fine again, will refit it back together today and run it through my Autocom tester but without the upper casing so that I can exactly see what's happening inside there and if it's all good.

[Geoff130]

Thanks, I checked with TOAF last night and both my vis motors are showing errors. I thought the manifold rattle I had was the butterflies and didn't realize the motors could cause the rattle too. I'll try them first.

[SD1too]

Originally Posted by Rsnail

Thing is for me, I want to repair them on my own and then isolate them properly from the oil that might be getting inside them, but I like repairing stuff on my own and that's why I want to do it ..

I'm with you 100% here Galambosi.


Congratulations on your success! I repaired my VIS balance actuator too. I had a faulty microswitch.

Simon

[Rsnail]

SD1too, how do you test the microswitch? I just put the multimeter on them, press the button on them and then the noise my multimeter makes is stopped and that's how I know it's working, am I doing it properly?

[Synchromesh]

Originally Posted by Rsnail

Thing is for me, I want to repair them on my own and then isolate them properly from the oil that might be getting inside them, but I like repairing stuff on my own and that's why I want to do it, hence my question where I can find the small DC motors, or if one that smoked a little would still be repairable.

I recovered a dead motor by removing the load by removing the gear wheel then I sprayed the motor with aerosol switch cleaner or IPA. Point the tube of the aerosol into the holes in the motor. Apply 12V to the motor terminals and spin the shaft with your fingers. Mine was initially dead. Then it turned slowly and stopped. After another spray and a more manual turning of the shaft it started turning on its own and got faster and faster. Then I reversed the connections and let the motor spin in the opposite direction for a while.

[SD1too]

Originally Posted by Rsnail

... how do you test the microswitch? I just put the multimeter on them, press the button on them and then the noise my multimeter makes is stopped and that's how I know it's working, am I doing it properly?

Yes, your test procedure sounds reliable. If you had obtained confusing results I would have recommended that you remove the microswitch and test it whilst isolated from the rest of the circuit.

Simon

[Bolin]

Originally Posted by Geoff130

I thought the manifold rattle I had was the butterflies and didn't realize the motors could cause the rattle too. I'll try them first.

From what I remember Stocktake told me about this, the rattle is solely caused by the butterfly linkage being worn.

However, this won't always be noticeable if the VIS motors are working as they (well the power motor only, not the balance) can hold the butterfly linkage tight most of the time so it won't rattle. But this only masks the underlaying problem of the wear in the linkage.

[Geoff130]

Yes, you're right, the linkage was just loose inside the manifold, I know there is a suggestion that ripping out the butterflies will give more power and will certainly stop the rattle but at the cost of low end torque and economy. I'm surprised no-one has made a replacement linkage available.