MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG Midget and Sprite Technical - Bushed rockers

A HUGE thanks to Martyn Wilks. Top guy and superb machinist.

Just need to ream back to size and drill the small oil feed holes and we are good to go.

A set of 1500 bushed rockers from Moss (for instance) would be around £100. These will have been done for around 1/4 of that.

Just been out in the sun too. Great day for Spridgeting.

Cheers,
Malc.

Malcolm Le Chevalier

Malc

Not bad... i love it when a plan comes togather
hreadlist

Malcolm,

Before you ream them look up machining sintered bronze bushes as IIRC it's not generally recommended. If you do have to size them then it might be better to press a suitably sized ball bearing or similar plug through the bore to compress the sintered bronze material.
David Billington

David,
are you able to email me please about some front suspension info for a friend, cheers.
Nigel Atkins

OK, thanks David. I wasn't sure whether to ream or not really. They are a little tight but mostly on the edge that had been pressed. There must be a bit of a squashed lip on that edge. I thought using an adjustable reamer just to skim the lip off things would fix it.

What's your background by the way? you are very clued up on such things. It's fascinating.

Cheers,
Malc.
Malcolm Le Chevalier

Malcolm,

My background is in mechanical engineering/metalworking although I did work as a software engineer for 20 years. I got involved in software while doing an engineering degree and ended up being offered a job and training in software so stayed with that until I got bored and made a life change back to metal working/engineering but I had always kept that in the background as a hobby. Likely the burr is the result of the pressing technique, the normal advice is to use a press arbor that locates in the bore and bears on the OD to help prevent such burrs occurring. One oilite machining advice page is this http://www.oilite.com/bmp.asp , there are others. The ballsizing option is just to get a suitable ball bearing and press it through the bore to compress the sintered bronze slightly and that should remove your burr. You might find that you can burnish the burr yourself with the likes of a smooth steel surface such as the shank of a drill, just push it against the burred bit and run it around the inside of the bush with some force, I expect you'll be able to see where it has worked the surface, and then check the fit again.
David Billington

This thread was discussed on 25/03/2017

MG Midget and Sprite Technical index

This thread is from the archives. Join the live MG Midget and Sprite Technical BBS now