Author Topic: HELP! Supercharger making odd noise  (Read 1810 times)

Offline kwijibo_coupe

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HELP! Supercharger making odd noise
« on: June 08, 2014, 12:45:44 pm »
Right basically I rebuilt my supercharger but on fitting and startup it pissed oil everywhere.
Turned out to be a seal I had accidentally nicked when fitting to the scroll.

Anyway swapped the scroll out for one from a known working charger.

When I turned the charger by hand after the new scroll was fitted it turned fine. But on the car it started making an odd clicking/knocking kind of noise.

Took the charger back off and if I quickly rock the pulley back and forth I can hear and feel a knock but I can't pin point where it is coming from.

Any ideas greatly appreciated, really need the car working :(

Offline PeteG40

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Re: HELP! Supercharger making odd noise
« Reply #1 on: June 08, 2014, 01:36:25 pm »
did the counter balance weight go on without any force?

you sure you got that the right way round (and the one on the countershaft right too)


Offline kwijibo_coupe

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Re: HELP! Supercharger making odd noise
« Reply #2 on: June 08, 2014, 01:59:35 pm »
Right cracked the thing open again and found that there is about 1mm of up-down play in the top counter balance.

Is this what I'm hearing? It's all I can find. Everything else is nice and solid.

Offline PeteG40

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Re: HELP! Supercharger making odd noise
« Reply #3 on: June 08, 2014, 02:25:35 pm »
it should be flat side up.

take the circlip off and keyway out.  rough up the keyway with side cutters and refit.  Should be tighter now.

Is it a jabbasport marked counterbalance weight by anychance?

Offline kwijibo_coupe

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Re: HELP! Supercharger making odd noise
« Reply #4 on: June 08, 2014, 02:45:15 pm »
I've changed the keyway and counter weight over from the other charger (this thing is turning into a bit of a frankenstein) and it is a tighter fit.
The counter weight isn't marked with a JS number, but the one on the shaft is.

Refitted the casings together and if I put my fingers through the outlet and stop the counter weight moving I still get a little play.

Should it be completely solid?

Offline PeteG40

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Re: HELP! Supercharger making odd noise
« Reply #5 on: June 08, 2014, 02:49:47 pm »
no - sometimes theres a little play.

one thing to mention is to weigh the counter balance weight on the main shaft that says www.jabbasport.com  jabba sometimes used to 'balance' them - which means they often are lighter than stock ones and don't balance!  causing a vibration

Offline kwijibo_coupe

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Re: HELP! Supercharger making odd noise
« Reply #6 on: June 08, 2014, 04:57:14 pm »
Well put it on the car and it sounds a lot better now, no oil bursting out of it this time either which is good.

All I can hear now is the whine from the toothies, so I hope all is well.

Offline PeteG40

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Re: HELP! Supercharger making odd noise
« Reply #7 on: June 08, 2014, 07:18:13 pm »
All good then! 

Offline kwijibo_coupe

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Re: HELP! Supercharger making odd noise
« Reply #8 on: June 08, 2014, 08:13:16 pm »
Thanks for your help Pete  :)