1949 PCD

for those with Series MM sidevalve cars produced between September 1948 and February 1953
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Onne
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Post by Onne »

jolly good. thanks Peder
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
mike.perry
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Post by mike.perry »

The Series MM does have 4 1/2in pcd and the later SII on has 4in pcd.
If you have 4in on a Series MM you must have the later brakes and rear axle.
Michael Perry
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Onne
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Post by Onne »

Who are you referring to Mike? I have both. Two cars you know!
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Cam
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Post by Cam »

So where are the pictures in your signature then Onne? :wink:
Onne
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Post by Onne »

Well, I replaced them... I'll chnage back to an updated pictures in the forthcoming week

Onne
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Cam
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Post by Cam »

Good man! :D

p.s. I like the maroon lowlight though. :wink:
Onne
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Post by Onne »

It is a lovely colour isn't it If my MM wasn't originally black, I'd have it maroon
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Alphaone
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Post by Alphaone »

All the MM's & first few serise II cars had morris dirived running gear, which is different to the later Austin sourced parts common to A30 etc, the brakes & hubs are different designs although the same size.

The 4,5" PCD is common to mainy other Morris & MG cars of the period & later, and even the early toyota celica! I used the 4J wheels from a 62 morris oxford which take the Minor1000 hubcaps, although i had to modify the angle of the taperd part of the bolt to match the wheel. I have seen period photos with what look like MG A 15" wheels fitted.

The bolts are fragile but not a fragile as the MM wheel, I have have seen several cars loose their wheels! this is because the hole in the wheel centre is not to too strong & opens up with wear untill the bolt pulls through!

The Solution i employed was to manufacture a special tapered washer to sit under the bolt head & make up for the lost metal.

I have also seen hardened studs (with nuts) from modern cars inserted into the holes in the brake drum/hub. an option to considder if you have a stripped thread & no spare, unfortunatley a common probelm when a garrage uses powerful air tools to tighten the bolts!
Alphaone
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Post by Alphaone »

Maybe I should point out that the idea of adding a tapered washer is to prevent the problem, not to repair a damaged wheel!

The idea is that a washer (thin enough not to prevet the bolt thread engaging in the wheel), will provide a sacraficial wear surface & prevent the holes becoming worn from repeted weel removal to the point where the bolt is loose in the wheel.

I started with soft mild seteel washers simply formed under the bolt, & a dab of loctite to stop them dropping off when the bolt was undone, I was not to happy as the washers often cracked, so I had a set of special taperd washers made, my wheels seam to have survived without the holes getting worn.

If you never take them off then there is no wear!
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