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Registered 2009 SLK200
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4,937 Posts
Think it needs a pulley extracter to remove ?
And i take it its held on by a allen key / bolt ??

Ive not looked at mine .

Looks pretty straight forward job to do .

Keep us updated and do you feel the difference in power ??

Oh what was the cost ?

Thanks
 

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Premium Member
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352 Posts
Discussion Starter #7
Think it needs a pulley extracter to remove ?
And i take it its held on by a allen key / bolt ??

Ive not looked at mine .

Looks pretty straight forward job to do .

Keep us updated and do you feel the difference in power ??

Oh what was the cost ?

Thanks

Yes, I have removed it with a pulley extracter.
Mine don't have any bolt !!!

The most difficult part of the JOB is to install the new pulley !!! :rolleyes:


I have a new ENGINE !!! :biglaugh:
The compressor is making 0,9 Bar peak, and the engine response is awsome.
 

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Premium Member
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334 Posts
Is the pulley just press-fitted? No locking screw?

Then maybe temperature treatment will help.

Aluminium expands much more when heated, than steel does, so putting the pulley in an oven, heated to 120-140 degrees Celsius, should expand it enough for it to slide on the axle.
Just to make sure, you can at the same time treat the axle with coolant spray, or dry ice, shrinking it a bit.
 

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Registered
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20 Posts
this pulley should be carbon steel made..it want splip any time soon (if it is aluminium, slipping is just a matter of time...and you dont want that while spinning at 18.500 rpm). Did you also remapped the ecu?
 

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Premium Member
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334 Posts
Looked like black anodized aluminium on the pic. Even a steel pulley could be heat treated on.
 

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Premium Member
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352 Posts
Discussion Starter #12
Is the pulley just press-fitted? No locking screw?

Then maybe temperature treatment will help.

Aluminium expands much more when heated, than steel does, so putting the pulley in an oven, heated to 120-140 degrees Celsius, should expand it enough for it to slide on the axle.
Just to make sure, you can at the same time treat the axle with coolant spray, or dry ice, shrinking it a bit.
Yes, mine it's just press-fitted. No locking screw.

I have tried that.
I heated the pulley with a torch, but it only helps on the first centimeters.
The rest of the way, I could not get it to go without screwing a nut !
 

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Premium Member
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352 Posts
Discussion Starter #13
this pulley should be carbon steel made..it want splip any time soon (if it is aluminium, slipping is just a matter of time...and you dont want that while spinning at 18.500 rpm). Did you also remapped the ecu?

Of course the pulley is Carbon Steel made ..... :biglaugh:

I don't remapped the ECU ! YET !! :biglaugh: :tu:
 

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Air Suspension Manager
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631 Posts
Well done, good job.
I really wonder the results.
Keep us posted.
 

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Premium Member
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352 Posts
Discussion Starter #19
how did you clean your injectors?

I remove the complete injector ramp.
I fill it up with gasoline and put some pressure on it with a syringe.

Then I apply 1,5V with a "AA" battery and 2 wires, at the 4 injector one by one.
IMPORTANT: apply this 1,5V to the injectors with short blasts.

And there you go.

If you search on Youtube I am sure you'll find some videos with the process.
 

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Registered 2004 SLK 200K
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10,745 Posts
With a lot of help and advice from vinnypt , I bit the bullet and bought and installed the smaller pulley ( 70€ inc postage direct from the seller ) . With the extractors I had , I found it impossible to remove the original pulley , but luckily I know some guys that do reprogramming etc and they changed them over for me ! There are a couple of hard to get to bolts and screws and some of the Mercedes jubilee clips are a pain , but worth it in the end .

I must say I had my doubts , as you never really gain what the sellers claim etc , it's still early days , but I have to say the car seems to really notice the difference !

As the revolutions of the Kompressor are up , the characteristic " supercharger Whistle " is slightly stronger when you put your foot down , which I personally like , very MadMax , jeje .
 
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