Engine bolt threads

[LAWRENCE A LECLERC]

----- Original Message ----- From: Bob Grunaugrunau.garage@sympatico.ca> To: ian thomsoni.thomson@talk21.com> ; Andrew Claytonandyc@alphalink.com.au> ; mg-tabc@yahoogroups.commg-tabc@yahoogroups.com> Sent: Tuesday, June 14, 2005 7:39 AM Subject: RE: [mg-tabc] Engine bolt threads Bob: Did you forget the Fan blade bolts; (5X.75 mm )? Hi Ian and Andrew, Just to clarify, metric bolts/threads found on the XPAG/XPEG engines are: 6 x 1.0 mm ( standard metric ) eg oil pump bolts 8 x 1.0 mm ( metric fine ) eg oil pan bolts 10 x 1.5 mm ( standard metric ) eg Head studs 12 x 1.5 mm ( metric fine ) eg Main bearing studs The "different pitch" of 1.0 mm only applies to the 8 mm size bolts in the engine/gearbox. Modern metric bolts can be found for all applications, however they use modern metric bolt heads, not BSF/W bolt heads so your expensive English wrenches don't fit. Bob Grunau Yahoo! Groups Links [Non-text portions of this message have been removed]

[Roger Furneaux]

hi all - luckily, the commonest, the 8mm has 13mm AF heads in its modern ISO form: this is only a tad less (0.512") than the equivalent 5/16" BST spanner size (0.525") and a good socket or ring spanner will tighten them quite happily. I make the special long 6mm oil pump bolts with 1/4" BSF heads, as per original, so no problem there. ocTagonally TCRoger Bob wrote:

>Modern metric bolts can be found for all applications, >however they use modern metric bolt heads, not BSF/W bolt heads so your >expensive English wrenches don't fit.

[Paroor]

Dear Ian Thomson, Andrew and Bob, I was fitting the bonnet and mudguard on the TC before final painting. The right mudguard had some accident. It was visible after removing all the paint to metal blank. So it is also not fitting perfect like the left one. So I'm getting some help from a person who restored more than six or seven MG vintage cars. Very often my friends from the vintage motorcycle club will visit me to give me a helping hand like David Tasa doing every time. Thanks David. We were discussing about mad metric. One person gave me some explanation. I never wanted to keep it for my self. _____________________ US they tried to adopt the metric system for where like many other countries did in the past. It never succeeded because major part common people thought they will soon introduce also ten days a week along with the other metric system. Of course there was rumour that the local banks and industry was supporting this idea because it will improve the work efficiency. Imagine a weekend every ten days only. Children had to go to school for nine days and then they get a day off. This fear really worked. So they never wanted to adopt the metric system. So they were all against it. I am not sure about this rumour. I can not believe. Some people say this is how politician leaders manipulate and fool the God fearing normal citizen. ____________________ Once again this is not my idea or thought. This is what I heard from some members here. I consider this as a joke and wanted to share with the members who do not take this serous and laugh about it. Have a nice day. Another struggling day with the right mudguard and the bonnet clips in Bad Soden. Madhu -----Urspr ngliche Nachricht----- Von: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com]Im Auftrag von Bob Grunau Gesendet: Dienstag, 14. Juni 2005 14:39 An: ian thomson; Andrew Clayton; mg-tabc@yahoogroups.com Betreff: RE: [mg-tabc] Engine bolt threads Hi Ian and Andrew, Just to clarify, metric bolts/threads found on the XPAG/XPEG engines are: 6 x 1.0 mm ( standard metric ) eg oil pump bolts 8 x 1.0 mm ( metric fine ) eg oil pan bolts 10 x 1.5 mm ( standard metric ) eg Head studs 12 x 1.5 mm ( metric fine ) eg Main bearing studs The "different pitch" of 1.0 mm only applies to the 8 mm size bolts in the engine/gearbox. Modern metric bolts can be found for all applications, however they use modern metric bolt heads, not BSF/W bolt heads so your expensive English wrenches don't fit. Bob Grunau Hi Andrew. The mad metrics have a different pitch (1mm)to the more commonly found items as well as BSF/W heads. As for the SO CD many people have problems with the front end. Just open up the "files" folder (i think it's called that - I haven't woken up properly yet this morning but I'm sure you will find it if I am wrong) and you will find each individual issue there as a standard acrobat file. Use an earlier version of acrobat then Seven though. You will lose the search function this way but all the info is there. Regards Ian Thomson

> Hi all, > > Can someone enlighten me about the correct threads > for the bolt holes in XPAG/XPEG engines. I always > thought they were standard metric with Whitworth > heads but now I'm not so sure - someone I met > described them as "mad metric" which he said is a > little different to standard metric - I always > thought this referred to the combination of metric > with Whitworth. So what is correct?? > > I've tried to look on The Sacred Octagon CD but I > can't get the bloody thing to work. I also looked at > the technology section of T-ABC and this seems to > confirm the threads are metric. > > Cheers, > > Andrew Clayton > Melbourne, Australia > TC 4054

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