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| Does anybody know... | Rate Topic |
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| Posted: 05-02-2018 07:47 am |
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1st Post |
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ilsinc Member
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Does anybody know if there is a torque tightening value for the nylock locknut on the timing belt tensioner?
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| Posted: 05-02-2018 08:48 am |
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2nd Post |
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Esprit2 Member
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I don't see the torque spec in the J-H manual, but in the Lotus world it's... Timing Belt Tensioner Retaining Nut 25 - 30 Lb-Ft = 3.46 - 4.15 Kg-m = 33.9 - 40.7 N-m Regards, Tim Engel
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| Posted: 05-03-2018 06:15 am |
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3rd Post |
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Randallclary@icloud.com Member
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My comment to this is this will not give you the correct belt tension, only tighten against the tension adjustment but. I went a step further and put a second nut on top of the locking nut after adjusting the belt tension and used a nylock nut to keep the lock nut from backing off. Just to be on the safe side with an interference fit engine like the Lotus 907.
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| Posted: 05-03-2018 05:32 pm |
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4th Post |
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Esprit2 Member
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Correct, this thread is NOT about tensioning the timing belt, it's about tightening the nut to securely lock the tensioner in place after the tension has been set. If the tension was incorrectly set by turning the tensioner clockwise, then the tensioner will tend to back-off in service. That doesn't mean it 'will' back off, just that it's loaded in a way that 'leans' in the direction of backing off. In that case, the Nyloc has a more difficult job ahead of it. If the tensioner does back-off, the root cause will be the incorrect procedure, not a failure to hold on the part of the nut. If the tension was correctly set by turning the tensioner COUNTER-CLOCKWISE (as viewed from the front of the engine), then the tensioner tends to hold it's setting, and the nut's job is less demanding. While there is nothing wrong with using a nut and a jam jut, if the tension is set correctly, then installing a new, full depth Nyloc nut each time will suffice. Regards, Tim Engel Last edited on 05-03-2018 05:52 pm by Esprit2 |
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