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Old 06-09-2010, 12:00 AM   #1
kometo
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Join Date: Nov 2009
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Location: Park Ridge, IL
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02 OBS 5mt
PSM/Graystone

Default 2.5 TB tensioner: superseded part numbers

Hello everyone. My 02 OBS is up for a timing belt service. In the midst of searching and pricing I've come across a new-in-the-box Subaru tensioner for sale p/n 13033aa040. subarupartswarehouse.com shows that it has been superseded with 13033aa042, which is what comes up for my car.

Does anyone know if there were any changes made to the tensioner when the p/n changed?

Thanks
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Old 06-09-2010, 01:57 PM   #2
kometo
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OK well I'm going to try and answer my own question. I called a local Subaru dealer parts counter and asked. They replied that sometimes the part is upgraded or the manufacturer of the part changes, but didn't give me a specific reason for this particular part. If anyone out there happens to know, please do tell.

Thanks
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Old 06-09-2010, 02:23 PM   #3
kometo
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One more time. Found this TSB on Scoobymods. OK I think I'm done now.
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Old 06-09-2010, 03:48 PM   #4
Patrick Olsen
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Was there supposed to be a link to a TSB? You've piqued my curiosity!
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Old 06-09-2010, 04:34 PM   #5
kometo
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Location: Park Ridge, IL
Vehicle:
02 OBS 5mt
PSM/Graystone

Default

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Old 06-09-2010, 06:04 PM   #6
grafton
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what is wrong with the older style tensioner like on the 2.2's?
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Old 06-10-2010, 02:42 AM   #7
kometo
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PSM/Graystone

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I don't know if this info also applies to the 2.2.
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Old 12-07-2010, 01:05 PM   #8
kometo
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PSM/Graystone

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Well it's been a few months since I replaced the timing belt, tensioner and rollers, as well as the tensioner bracket and bolts on my '02 OBS. I ended up getting all of the parts from Subaru, figured this was one job that I didn't want to short on. Temps have been in the teens the past few mornings and during coldstarts there is no more noise. Last winter there was a loud knock for the first few seconds during coldstarts. I don't remember seeing any obvious marks on the inside of the TB cover from where the belt might have slapped but I didn't spend too much time looking either and just cleaned it. I also checked the valves around the same time because I didn't know if they had ever been adjusted and found that they were all very close to spec (did a very slight adjustment and have not noticed any difference). So in my case replacing the tensioner, bracket and bolts seems to have taken care of the noise. But as always, YMMV.
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