StarvingArtist

The glued in and greased bearings are on the other end.

SuperChargerE55

Super thanks, ok so here is what happen my friend just bought E 55 2004 also with the familiar Chirp sound he got so pissed he sprayed some grease between the supercharger and the S/C Coupler see picture..
Before I could warn him he started the car and went of chirp sound gone S/C seem to not engage Chirp sound gone, he turned picked me up we went for some good runs and no car seems weak, we kept pushing it until we got to the garage one last boost damn there the chirp sound and since that is gone, we can feel it engage no doubt and car easily run 220 km/h on the highway..
I tried clean it for him with contact spray and left it dry of, I think we need remove it what you think can it get in between and destroy it?
What if washing engine do you cover it can water enter also?

I just want ask before doing to much,, the Dowel pins I read here something but you say heat it first
heating up the area where the threads of the bolt is

1 Picture Dowel pins

2 Where he put lube, stupid but to late..








Dowel pins.. hard to reach or?




Red arrow here he put lube chirp sound gone even after 1000 km driving..

StevenHaywood

Forgive me for resurrecting this very old thread, but I have just diagnosed an electrical issue on my SLK32's supercharger.
There is zero resistance between the two terminals of the connector, it was pulling down the voltage of that circuit of the engine management to 10V, causing error codes on the SAI switchover solenoid and both oxygen sensors.
Is it feasible that this diode going faulty could cause this symptom? (I don't know much about electronics)

Thanks!!

GatorMB

Hey Steve,

Diodes do a couple of things for cars. For one they protect the ECU and other important components like SAM and COM circuits.
If we look at a basic Alternator which charges the battery it generates an alternating current much like we use in the home.
A diode trio rectifies the AC to DC which our batteries need for life.
The magnetic clutch on the supercharger and some air conditioning clutch generates some eddy current like an alternator in the form of AC which can harm the electronics described above. A relay might contain a diode for motor circuits like the fuel pump and convertible top motors as well.
The diode drains harmful AC from the circuit.
You can test them with an ohm meter one way shows 0-10 or low resistance. reversing the leads should be in the Mega ohm to infinite range.
Make sense yet? the meter should only read in one direction across the diode with the external circuit disconnected. Hence Relay removed or key off.
There will be a resistance value of the clutch coil on the supercharger unless the diode is internal.
A good WIS test required here.
Hope this helps.

Gator

StevenHaywood

Thanks for the reply Gator
Turns out actually my diode is toast - 500+ kOhm in both directions. The low resistance on the coil was as designed, actually about 3 ohms. The low voltage on the circuit was caused by a faulty solder joint in the K40 relay unit...
So now trying to find a new diode... How risky is it not to have one in place? Does anyone know the specs of the diode required? I can't see a number on mine

Mr. CVE

Can this clutch be pulled off with the supercharger still on the car ?

cnterline

Yes, I have done it twice

Mr. CVE

great, do you mind if I ask you a few questions ?

Is it just a case of pull the blower pulley off, pull the 2 pins, and get a gear puller on it ? ( perhaps some heat on the centre shaft ( away from the clutch frictions ?)
I want to do this and then rmachine the clutch face flat and reinstall it.
Does this sound achievable ? any suggestions to reinstall ?
Or can I pm you ? or call you ?
Thanks and Regards

cnterline

Pm sent

SCarterMusic

can you help me with this? I think it may be my problem. How do I find what you are talking about here?

ta72

iTrader: (1)

Im looking for the diode too. Is the diode 12v 3amps?

zakri

hello does anyone know where to find the correct diode i tried the 12v 5w ac zener diode does not work. Thank you

nemiro

A Zener diode will not work. A standard 1N4004 or a 1N914 should work just fine.

zakri

thanks man i will try that

dantm2000

Hi guys, I had this issue with replacing my coil packs and two of the black pieces flew out before I figured out how to use the toothpick trick. With the toothpick and a tiny amount of teflon lube spray before unlatching the remaining connectors came out by hand with no effort.

But for the 2 that are now latching back in but not really holding tight is there a possibility to replace the inner black piece inside the connector without touching/altering the harness and swapping the *entire* connector?

Thank you all!