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Pully Question

1497 Views 13 Replies 5 Participants Last post by  Merc600sec, 
Dr. Claw
The waterpump just went out on my 96 S600 with 105k miles. Not bad. Fortunately for me I was a 1/2 block from the house. I'm looking up parts and I need to replace everything and have found all but the tensioner pully. My questions are:

1) Are the pullys for the idler and tensioner the same?

2) When replacing the thermostat, do I have to replace the housing too?

3) Do you reccommend replacing the belt tensioner mechanism too?

Thank you for your input.
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B
I had the same thing happen at about the same distance from home. We were lucky. Have you come across this, yet?

V12 Uber Alles, Water Pump and Thermostat Replacement in a W140 Mercedes Benz, article by Brett Allison

I think the tensioner pulley is a dealership only item. I didn't replace my tensioner, just the pulley. I think the thermostat is integral to the housing. I didn't study it enough to see if the thermostat could be removed easily. Just replace the whole thing and be done with it.

Brett
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