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  #1  
Old 02-22-2011, 11:14 AM
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Tensioner Pulley

Hi All,

I recently replaced my belt tensioner, pulley and shock on my 1993 300d. The belt does not ride in the center of the tensioner pulley. I can see approx 1 mm of pulley in front of the belt and at least twice that amount to the rear of the belt. Is this typical? I installed the spacer washer on the pulley that was originally installed.

The back of the belt does seem to be wearing, although it unfortunately got soaked with engine oil. Something is squeaking about twice/second. The water pump pulley was chewed up (on the mating surface to the belt) from a previous owner. I plan on replacing the water pump pulley, but am concerned about how the belt rides on the tensioner pulley. Do I need to re-shim it till it is in the center of the pulley?

Any advice?

As always, thanks in advance.

Andrew

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  #2  
Old 02-22-2011, 11:37 AM
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That doesn't sound too bad.

But you may have forgotten the large washer that is placed between the timing cover (front of the engine) and the tensioner arm.

Check your old pulley on the back to see if it is still on there; new ones do not come with this washer.
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  #3  
Old 02-22-2011, 11:41 AM
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So the pulley goes between the arm and the cover (not between the pulley and the arm)?

I found mine on the ground after removal of the old part.
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  #4  
Old 02-22-2011, 11:42 AM
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could you re-write that, please? / clarify
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  #5  
Old 02-22-2011, 11:47 AM
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see # 362


http://w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/602_603/13-3200hw.pdf
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  #6  
Old 02-22-2011, 12:09 PM
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Duh!

That explains it. I installed the washer between the pulley and the arm, not between the arm and the engine.

When I replace the water pump pulley, will it pull off easily? In other words, can I remove it in place without a pulley puller?

You guys are great!

Andrew
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  #7  
Old 02-22-2011, 12:15 PM
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The water pump pulley comes right off by hand after removal of the bolts.

good luck.
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  #8  
Old 02-22-2011, 03:53 PM
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80nM tightening torque, so not that easy.
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  #9  
Old 02-23-2011, 06:18 PM
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Success!

I reinstalled the washer where it was supposed to go, cleaned everything up, put the new water pump pulley on (not hard to loosen before removing belt), and put a new belt on just in case.

No squeaks! Now the girlfriend can borrow the car

Thanks guys.

Andrew

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