Series MM Questions

[palacebear]

Hi.
Answer is NO

Series MM with side-valve engine was replaced by split-screen Series 2 with OHV engine during 1952. Series 2 was facelifted during 1954 but retained split-screen until phased out during 1956.

If your shell still has a chassis/id plate on the bulkhead, the chassis number should tell you whether it's a Series MM shell (prefix SMM) or a Series 2 (prefix starting with F).

If it IS a Series MM shell there may, depending on it's age be a number of differences between it and earlier/later shells.

[JohnV]

With respect, I don't think this is quite correct.

The new ID plates with F-series prefixes were introduced 1 April 1952, presumably to rationalise with the Austin system in the newly combined BMC. It started with serial # 139439, and the old Nuffield practice of allocating separate RHD and LHD sequences ended.

But the first Series II car wasn't until August 1952, at chassis # 160001. So I believe all Series II Minors should have "F" prefixes, and even some late Series MM cars as well.

best, jv.

If your shell still has a chassis/id plate on the bulkhead, the chassis number should tell you whether it's a Series MM shell (prefix SMM) or a Series 2 (prefix starting with F).

If it IS a Series MM shell there may, depending on it's age be a number of differences between it and earlier/later shells.

[palacebear]

With respect, I don't think this is quite correct.

The new ID plates with F-series prefixes were introduced 1 April 1952, presumably to rationalise with the Austin system in the newly combined BMC. It started with serial # 139439, and the old Nuffield practice of allocating separate RHD and LHD sequences ended.

But the first Series II car wasn't until August 1952, at chassis # 160001. So I believe all Series II Minors should have "F" prefixes, and even some late Series MM cars as well.

best, jv.

I think you're probably correct. I'd overlooked the 'small' fact that S-MM and S-II were built alongside each other for a few months, hence S-MM with numbers higher than 160001 would in all probability have F prefix numbers!

I've already got my new copy of Minor Matters and was fascinated by the feature on Clementine. What a great project! I wish you well with her and hope that you keep us all updated on your progress

[JohnV]

Thank you for the good words! Clementine will be quite a project, for sure.

But, hey, everyone needs to do one ridiculously complicated, horrifyingly expensive rotisserie restoration in their life ... right?

I've already got my new copy of Minor Matters and was fascinated by the feature on Clementine. What a great project! I wish you well with her and hope that you keep us all updated on your progress

[firedrake1942]

No dividdd into mm, early s2 and late s2

[Mick Lynch]

What’s people’s thoughts on these NOS rings? Salvageable?

[philthehill]

Only good for the scrap bin unfortunately

[sirrom918]

I totally agree with Phil's comment. ESM can supply new piston ring sets from standard size through to +60 for the 918cc Side-Valve Series MM Minor.

https://www.morrisminorspares.com/engin ... 40-p830018