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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Serp Belt -Tensioner & Pulleys



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      06-22-2013, 03:21 PM   #1
123Britt
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Serp Belt -Tensioner & Pulleys

N54 here -- had to remove the fan assy -- turned out that the drivers side rubber mount boot / clip was the hardest part of the job. Took me an hour to just get the fan out. Once out -- everything was accessible even with the
darn air duct running across the front (bolts out and generally out of the way). I also had to remove the IC charge pipe (some oil traces even with my BMS OCC)

At 85k -- the belt and pulleys looked in great shape & bearings on all were smooth rolling and no noticeable differences from the new INA parts.

Ordered from one of my favorite vendors ~ ECS Tuning
. Conitech Belt & INA Tensioner & Pulleys
.
For sure an easy DIY with a big savings over dealership pricing.
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      06-22-2013, 07:41 PM   #2
triger716
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I just did the same thing yesterday. I'm at 61k. I changed the belt, idler pulleys and tensioner along with coolant and P/S fluid.

I also found it pain to try lift the fan out and try to get that charge pipe off of the rubber mount that's attached to the fan. Since I also change my coolant and P/S fluid, I actually had the intercooler off so that made it a little easier. the intercooler was much easier to remove and reinstall than I thought it would be.

I also had a little oil i my charge pipe. I don't have a OCC though so I feel better that a little oil in the charge pipe is "normal" in these engines.

Last edited by triger716; 06-22-2013 at 07:47 PM.
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      08-06-2013, 02:52 PM   #3
Jklad
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I have to change my belt soon also. How can you determine whether or not a the tensioner, or any pulley needs to be replaced as well? Do some folks just do it proactively?
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      08-06-2013, 04:21 PM   #4
123Britt
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YES

If it is a difficult journey -- better change everything out while you are there -- you don't want to make a repeat trip anytime soon. They are know to fail prior to 100k.
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