1991 300e Drive Belt Tensioner Not Loosening
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1991 Mercedes-Benz 300e
1991 300e Drive Belt Tensioner Not Loosening
Hi All,
I have a query regarding the regarding the drive belt tensioner.
I am looking to change the drive belt on my 1991 300e and I have loosened the 19mm bolt on the tensioner about 1/2 turn as the manuals say and I have turned the tensioning nut anti clockwise but the belt is still in tension and cannot be taken off easily. I have followed the procedure in the manuals online but the tensioner isn't loosening at all, I have turned the tensioning nut all the way anti clockwise but still the belt is still tensioned? Is my tensioner broken and in need of replacement or would I need to un do the 19mm bolt more than 1/2 a turn?
Thanks,
Brian
I have a query regarding the regarding the drive belt tensioner.
I am looking to change the drive belt on my 1991 300e and I have loosened the 19mm bolt on the tensioner about 1/2 turn as the manuals say and I have turned the tensioning nut anti clockwise but the belt is still in tension and cannot be taken off easily. I have followed the procedure in the manuals online but the tensioner isn't loosening at all, I have turned the tensioning nut all the way anti clockwise but still the belt is still tensioned? Is my tensioner broken and in need of replacement or would I need to un do the 19mm bolt more than 1/2 a turn?
Thanks,
Brian
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Joined: Mar 2016
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From: SF Bay Area, CA
190E 2.6L 1989, 190E 2.6L 1988, BMW 535dXdrive 2014, BMW 428i 2015
Maybe post a picture of the tensioner. Where it the tensioner gauge sitting at? Is it at full scale? Also I would loosen the 19mm bolt more than a half turn.
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Joined: Mar 2004
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Consider removing the bolt from the chain tensioner shock dampner and loosen the center bokt more. This video may offer some guidance. https://www.google.com/search?q=1991...Rm5dAdrp0,st:0
