Alternator belt tensioner Series 1 mi16
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  1. #1
    1000+ Posts cav91's Avatar
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    Default Alternator belt tensioner Series 1 mi16

    G'day all again.

    Just wondering if either anyone has a tensioner they don't need anymore, or has a solution for not using it? Can you use a shorter belt and just tension through the alternator?

    Thanks Chris

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  2. #2
    1000+ Posts pgti6's Avatar
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    If you've ditched the a/con, yes you can use a smaller belt just to run the alternator.

    Jeff
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  3. #3
    1000+ Posts cav91's Avatar
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    ok. I still has the ac. I don't really want to remove thne ac system. So there isn't any other way? It looks like I'm gunna need a new tensioner.
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  4. #4
    Fellow Frogger! Balki's Avatar
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    Default tensioner

    not avaiable anymore so i have go them made at a machine shop in aluminum and a replacable bearing held with circlip

  5. #5
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    Balki, can you provide more info please? Do you use the original centre piece with the eccentric tensioning arrangement?


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  6. #6
    1000+ Posts cav91's Avatar
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    Yeah what he said!

    Did they cost much, because I don't want to spend much on it yet, because it will be coming off the road soon for a rebuild. All my money is going on the series two at the moment!
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  7. #7
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    Default you can short belt it

    Put on a 5 rib belt 1010mm long from repco and get it tight, will do the job better than listening to a moaning pulley bearing. I have had two mi's for many years that way, gotta be tight tho.

  8. #8
    1000+ Posts cav91's Avatar
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    is this without the tensioner, just using the alternator to tighten it?
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  9. #9
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    The theory is that with a/c models there isn't enough of the belt in contact with one of the pulleys when you don't use the tensioner pulley (don't know if it's the a/c or alternator one). The trouble with overtightening it is the alternator bearings are under more stress.


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  10. #10
    1000+ Posts cav91's Avatar
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    I think I've found some NEW aftermarket ones. Cheap too a little over $100 and all alloy not that stupid plastic!
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  11. #11
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    Come on, don't tease!

    Maybe use one of these:

    http://www.ebay.in/itm/ws/eBayISAPI....m=370493190900

    ...and tension the belt with the alternator. Or find a similar tensioner from another car. I've heard of people using Saab and VW tensioners.

    Stuey
    Last edited by Stuey; 24th October 2011 at 10:01 PM.


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  12. #12
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    As I also need one of these soon, I called EAI. They say they have them for $105.


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  13. #13
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    Quote Originally Posted by Stuey View Post
    As I also need one of these soon, I called EAI. They say they have them for $105.
    I've just found a pretty good used one. $10.
    Graham

  14. #14
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    Yeah, rub it in why don't ya!

    I have a used one with good bearings and hardened broken seals and intended to buy an identical bearing (being an SKF part) and transfer the seals over...but someone on AF found it was a uniquely sized bearing so I gave up that idea. Still worth a try I guess.


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    Quote Originally Posted by Stuey View Post
    Yeah, rub it in why don't ya!

    I have a used one with good bearings and hardened broken seals and intended to buy an identical bearing (being an SKF part) and transfer the seals over...but someone on AF found it was a uniquely sized bearing so I gave up that idea. Still worth a try I guess.
    I meant that I have it for sale after finding it in my stock of parts.
    Graham

  16. #16
    1000+ Posts cav91's Avatar
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    I'll take it!
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  17. #17
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    Doh!


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  18. #18
    Fellow Frogger!
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    Default the pulley always fails

    i have two mis, daily driven both have no idler and use the alt for tension, neither have given trouble in 3 to five years, one has been that way for longer, i figure the pulleys never last that long so its more reliable, and yes it has to be tight, but not to the point of damage, and as for putting on a second hand pulley, i have several good ones but wouldnt bother putting them on, they always die at the wrong time, as in a long trip.

  19. #19
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    Cheers Fish, I don't suppose you'd know which belt you used, either the length or what it fitted? Easy enough to work out I know, but even easier if you've done it!


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  20. #20
    1000+ Posts pgti6's Avatar
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    Rich_w on the 306 GTi6 forum was selling alloy idler pulleys with a replaceable bearing, similar to Balki's idea.
    Don't know how the diameter compares with the Mi one, but it might be worth investigating.
    Track car-Steel Grey 405 Mi16 2.2 litre


    405 Track car build thread moved to-
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    1998 306 GTi6
    1997 306 N5 sedan
    1996 306 N3 XT hatch
    1976 Renault R16TS manual in Avocado
    1976 Renault R16TS manual in Trak Yellow
    1975 Renault 5 Guernsey, Channel Islands
    1972 Renault 4 Guernsey, Channel Islands

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