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The BMW Range
5 Series
E39
Belt tensioner
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<blockquote data-quote="moots" data-source="post: 573964" data-attributes="member: 219"><p>bro which belt tensioner are you talking about?the main one or for the a/c compressor?</p><p></p><p>the a/c tensioner does emit sound even if it is new but not due to the tensioner itself but due to the asembly that hold the pulley.on this assembly are roller bearings that wears due to age.i've lubed these roller bearings but this only works for a while before the noise comes back.</p><p></p><p>and no it is not wise to lube new pulley bearings as the lubricant WILL attract dust and accelerate wear,even if there is a pulley cover.</p></blockquote><p></p>
[QUOTE="moots, post: 573964, member: 219"] bro which belt tensioner are you talking about?the main one or for the a/c compressor? the a/c tensioner does emit sound even if it is new but not due to the tensioner itself but due to the asembly that hold the pulley.on this assembly are roller bearings that wears due to age.i've lubed these roller bearings but this only works for a while before the noise comes back. and no it is not wise to lube new pulley bearings as the lubricant WILL attract dust and accelerate wear,even if there is a pulley cover. [/QUOTE]
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Belt tensioner
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