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Are You Using Sub Standard Bolts In Your Engine ?


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#16 mini93

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Posted 06 November 2010 - 11:09 AM

pretty sure sprocket also mentioned on here previously as i knew about the problem before i joined TM years back

#17 DAVEY_C

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Posted 06 November 2010 - 11:39 AM

pesonally i don't like the word stole as it can incriminate someone who may well have heard of this problem still happening to date and is trying to increase awareness that it is not only in the past but may well still be happening or is still happening. if it raises his sales so what, at least engine builders are getting the correct grade bolts and thus increasing the reliability of their engine...... i think that is more important than trying to accuse the person of STEALING information.

does anyone agree or disagree??

if partial recoignition is requested then whats stopping mra-minis receiving recoignition as nobody knows who is the originator of this topic and everyone else has so called STOLE THEIR INFO, its a childish thing to ask for recoignition on something thats probably going on generations.... "topic closed"

thank you mra-minis for resurrecting this topic as i didn't know about it and to the members who have contributed information as they have been very helpfull.

Edited by DAVEY_C, 06 November 2010 - 12:12 PM.


#18 Ethel

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Posted 06 November 2010 - 11:57 AM

Let's try & avoid another unnecessary argument.

Like Martin, Sprocket is a very knowledgeable and long standing TMF member. His expertise, particularly on the mystical wonders of Rover fuel injection, has benefitted many. If he's about less frequently on the forum than he used to be it's because of the petty spats.


http://www.theminifo...x...27451&st=15

#19 Sprocket

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Posted 06 November 2010 - 12:25 PM

You're saying MRA stole your information to post it on here so he can sell some bolts?


Your words not mine!!!

#20 Sprocket

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Posted 06 November 2010 - 12:26 PM

pretty sure sprocket also mentioned on here previously as i knew about the problem before i joined TM years back


Indeed I did, but you will also find that I attributed it to Turbo Minis

http://www.theminifo...x...bolts&st=30

#21 Ethel

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Posted 06 November 2010 - 12:36 PM

Probably a good point to draw a line under this.

If anyone feels a pressing need to reply - pm me :D

#22 MRA

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Posted 09 February 2011 - 07:12 PM

In actual fact, I undertook as part of my degree way back ..... a complete run down on bolts and fixings, I was aware of this issue long before TM even existed, However my point in raising it again, and again and again is not to upset Sprockett or anyone on TM but to make more Classic Mini owners aware, this is not so that I sell more CSM's, as they are not really worth making, but to help those individuals who buy a product only to find that it causes the demise of their engine, if this upsets Sprockett or any other people then I can only assume that they would benefit from fitting or selling inferior products and you as Mini owners should be wary of such people.

I note that in Mini magazine February issue page 106 a certain so called specialist who has told me he now uses the correct bolts has a photo of a CSM with SAE 5 bolts instead of SAE 8's.

So who's right ?

#23 tiger99

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Posted 18 January 2012 - 03:50 PM

There is a pinned, locked topic on dodgy engine bolts already, but it is lacking in information on how to identify which bolt you have, or need, for other things. So I have found a few links which should be useful to others.

http://www.engineersedge.com/hex_bolt_identification.htm covers head markings etc.

http://www.americanfastener.com/technical/grade_markings_steel.asp more of the same, including nuts.

http://store.curiousinventor.com/guides/Metal_Working/Screws/ some good technical stuff.

www.cat.com/cda/files/87031/7/13_OSS_Hardware.pdf A useful catalogue with dimensions. I can't seem to get rid of the italics. Grrrrrr!

http://www.rigging.net/Bolts.html More head markings, tables, dimensions.

http://www.jgmes.com/library/table_fastener.htm Good comparison of US (SAE) and ISO standards, and a dire warning about inappropriately plated bolts. The dreaded hydrogen embrittlement!

http://www.britishfasteners.com/BRITISH_SERIES_BOLT_HEADMARKINGS.pdf Some nice pictures of head markings and also shows that "Grade S" used on early Minis is comparable to "Grade 8.8".

http://panchsheelfasteners.in/product_pdf/hightensile_bolts_technical.pdf Again relates grades S and V to ISO standards and gives things like recommended torques for different sizes. (If Rover have recommended a torque, use that of course).

http://www.bestbolt.com/white_papers/white_paper_02.pdf How to match strength of nut and bolt, which is actually quite important.


I hope these links are useful. You may care to print out your favourite, e,g, a torque chart, laminate it and keep in in the garage for reference. Comments and additions are of course welcome.




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