The flywheel on my 1275 motor has had the timing markes machined off when the PO has had it lightened.
I have now replaced the marks by finding TDC on the engine and restamping where I think they should be.
I note that in some of the workshop manuals the picture of the TDC marks show them next to one of the pressure plate bolts and this is the same as my Cooper S, but on this flywheel they are about halfway in between 2 of the pressure plate bolts.
Can I assume there are different model flywheels and mine is OK? This flywhell is a leter version and the centre is one piece.
I even took it off the crank last night to check as I thought I had fitted it on 180deg out but when I tried to do this I found there is now way the keyed washer will allow for this. So I can only assume it is fitted correctly.

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S

There were about 1/2 a dozen different flywheels, maybe more. Somewhere I do have the ID chart, but there where at least 2 (from memory) that had the timing marks as you have described.

Those that are 2 piece are less suitable for lightening than the one piece ones, I'm not saying Un-suitable, just that you can take more off the one piece ones with greater safety.

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Here it is







Hope you can read that OK, otherwise I'll email it

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Thanks.
You are a wealth of information.

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S

You're welcome, but just on another look, I'm nit too sure if that is in fact any help as it only goes to march 1968 and you said your's was a one piece (mmmm.....I like a nice one piece!!) and that ID chart doesn't seem to cover them.

I think I have a latter one. I'll see if I can dig it up.......

In the mean time, have a look at this one piece



Oh, yeah, damm it, we were talking flywheels.........

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I thank you for details of the later version one peice but have some concerns that this item may end up in the poolroom ?

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S

Nothing wrong with that one piece!

I would like to get a copy of that tech data though GT, I'll PM you...

Cheers!

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Sir Alec! we are not worthy!

I would very much appreciate a copy fo your flywheel data please - could you send it to my emial address - [email protected]
Hope I can return the favour in the future.

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John Sneddon
0408 431 807
1963 Morris Cooper
1965 Morris 850
1968 Morris Cooper S

Hi GT,
At this stage I wont be asking for an emailed copy of your tech data as I am only concerned with further information on one piece configurations.

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S

How much could be safely machined off that one piece? I've heard stories of lightened ones flying apart destructively, I can only imagine what might happen if that occurred.

Tim

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1951 Morris Commercial J Type Van
1955 BSA C11G
1961 Morris Mini Traveller
1969 Triumph TR6R
1977 Leyland Moke Californian

Lots of guys do lighten the factory flywheels and don't have problems, but I have seen the results from them exploding, not nice so the memories I have of those have turned me right off that idea forever. Lightened Steel ones IMO are not expensive, so I go that way if I'm after a lightened flywheel. It also seems that the steel ones are lighter too.

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Emails sent to all who requested.

Oh, and here's another type of one-piece flywheel

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I'm thinking that all threads need to be interspersed with photos of one piece flywheels.
I'm sure this would reduce the amount of friction and arguments.

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1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S

Oh yeah.....what's to argue with.......

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those one piece fly on the walls just keep getting better GT.

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Aussie Leyland, Aussie Factory, Aussie Mini S.