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Timing Chain Tensioner - How Tight?


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#1 myminipickup

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Posted 29 May 2017 - 11:36 AM

Hello

 

I am rebuilding a 1275 A+ and just replaced the timing chain and tensioner - how much tension do I need to apply to the chain? How do you know how much is enough or too much?

 

Many thanks

 

 



#2 wile e coyote

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Posted 29 May 2017 - 05:53 PM

I'd just bolt the tensioner on.....and at it's minimum adjustment - i.e none , it'll be fine - the new chain will be temporarily nicely tight the only point of the tensioner really is to minimise rattle...(ok ok a worn chain will chuck the timing out about 3 degrees)

 

 

I'd have used a duplex set though ..... tentioners optional with those!



#3 Spider

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Posted 29 May 2017 - 07:49 PM

The workshop manuals give no advice other than to refit it.

 

I have always fitted them as tight as they go.



#4 Boycie

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Posted 29 May 2017 - 08:53 PM

I fitted the A+ tensioner/ plate etc to my A series a few years back.  It seemed like a good idea at the time and I suppose it was.. for a few thousand miles.  Then the rattle came back.  I too, could find no advice on how 'tight' to fit the tensioning shoe, so fitted it with light hand pressure.  Not very scientific I'm afraid.  I think I'd apply more pressure next time (like Moke says above) as the rattle is back as loud as ever again.  I think it was quiet for around 6000 miles.



#5 myminipickup

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Posted 29 May 2017 - 10:32 PM

Thanks for your help.. I'll just push it against the chain then I guess!?



#6 Boycie

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Posted 30 May 2017 - 04:48 PM

I'd say so. It's a bit of an afterthought setup I think.. and worth remembering that noisy chains rarely cause trouble unless they get really bad!

#7 Cooperman

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Posted 30 May 2017 - 05:17 PM

Fit a Duplex chain and sprockets and forget about the tensioner. That's what the Mk.1 Cooper 'S' had.






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