Modern clutches

Technical advice Q&A

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Durango2k
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Joined: Fri Feb 11, 2011 11:59 pm
Location: Germany
Germany

#1 Modern clutches

Post by Durango2k » Sun Jan 11, 2015 10:31 am

After I received the (new) 9.5" Dia clutch, I found that SNG had sent me the Wrong bolts.

They are 5/16, So the thread does fit, but They came shouldered.

Now, Looking closely at the parts book, I found that there are "Balance pieces" which seem to be fitted with these bolts.

Should I get bolts which are FULLY threaded, or a set of Balance pieces ?

(SNG even sent me another set of the THICKER bolts, saying "these MUST work" - err, nope.

Carsten
Last edited by Durango2k on Sun Jan 11, 2015 9:53 pm, edited 1 time in total.

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abowie
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#2

Post by abowie » Sun Jan 11, 2015 8:08 pm

Get the right bolts or reuse your old ones.
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1979 MGB (supercharged).
Adelaide, Australia

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David Oslo
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#3

Post by David Oslo » Sun Jan 11, 2015 9:28 pm

From memory (it's a few weeks since I was at my clutch & flywheel, getting them balanced) it uses fully threaded bolts (e.g. set screw). Given you have received non-fully-threaded bolts you could choose to run a die up the thread to make it fully threaded, or to purchase replacements that are set screws.

I guess it's your tool kit that ends up making the choice for you.

Remember it's the two dowel pins that transfer the torque of the clutch cover to the flywheel, whilst the set screws hold it clamped in position. Sure, the friction of the land around the set screws will also transfer torque.
David
S1 2+2 '67 MOD conversion (going)
S2 OTS '70 (arriving)

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Topic author
Durango2k
Posts: 1558
Joined: Fri Feb 11, 2011 11:59 pm
Location: Germany
Germany

#4

Post by Durango2k » Sun Jan 11, 2015 9:53 pm

.. True, I don?t have a 5/16 thread cutter.

I cannot reuse the old ones, because I come from the 10" Version (thick bolts), and went to the 9.5" version (thin bolts).

So, I need SNG to get me the correct ones.

Carsten

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