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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-17-2012, 10:28 AM   #1
mcaltinsoy
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Join Date: Apr 2012
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A/C and ACC tensioner replacement necessary?

Hey guys, I have an 04 330ci. A/T I'm gonna replace my power steering pump as well as my drive belts. But do you guys really think that i should replace my tensioners as well while i'm there? I mean it is literally $100 at bmaparts.com What kind of problems have you guys had with them so far? I haven't had any problems with them? what happens to them. Do they fail? leak? Is it really necessary to do this?
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Old 12-17-2012, 11:24 AM   #2
tech4tech
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We just had this discussion yesterday here:
http://forum.e46fanatics.com/showthread.php?t=961061

Basically, at the very least I'd recommend checking if the pulleys are free-spinning (meaning dry bearings) and if they are, then replace those.
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Old 12-17-2012, 12:04 PM   #3
E46@46
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I just replaced my PS pump and did not replace the tensioners. No issues so left them as-is. Good luck on the pump. I have Auto Trans also with the LF30 PS Pump. Had to remove the AT coolant housing at the radiator to have room to get the PS Pulley off, which means draining the radiator. Also getting the back bolt of the PS pump was a pain. Had to remover some plastic ducts that cool the alternator to get to the back bolt if you have the LF30 pump.
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Old 12-17-2012, 12:09 PM   #4
MercForHire
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Dont replace the tensioner, just the pulleys on top.

Tensioner is a lifetime part
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Old 12-17-2012, 03:24 PM   #5
S-Works
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Quote:
Originally Posted by tech4tech View Post
We just had this discussion yesterday here:
http://forum.e46fanatics.com/showthread.php?t=961061

Basically, at the very least I'd recommend checking if the pulleys are free-spinning (meaning dry bearings) and if they are, then replace those.
Or service them. I crack mine open every 30K or so and clean them out and repack with grease. Never have one fail.
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Old 12-17-2012, 03:31 PM   #6
tech4tech
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Originally Posted by S-Works View Post
Or service them. I crack mine open every 30K or so and clean them out and repack with grease. Never have one fail.
What kind of grease are you using?
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Old 12-17-2012, 03:32 PM   #7
MercForHire
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lithium grease
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Old 12-17-2012, 03:32 PM   #8
S-Works
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Originally Posted by tech4tech View Post
What kind of grease are you using?
Mobil 1 synthetic grease. A tub of it was like $10 at Adv. Auto.
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Old 12-17-2012, 03:47 PM   #9
tech4tech
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Originally Posted by S-Works View Post
Mobil 1 synthetic grease. A tub of it was like $10 at Adv. Auto.
I saw some recommendations for Lucas Oil X-Tra Heavy Duty Grease, but it seems like a risky operation with the seals removal/reinstallation, and given the low cost of the pulleys.
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