G'day guys,

Has anyone had to replace a ring gear?
Are they easy to replace or is there some tricks that I need to know?
Cheers

Here's how I do it:
1. Cut almost through ring gear with angle grinder and cutting disc. DON'T nick the flywheel.
2. Split gear off with a hammer and chisel. Wipe flywheel surface where it sat. Sit flywheel on floor with clutch running face upwards.
3. Sit new ring gear on 3 bricks (firebricks best, otherwise use dry housebricks) with chamfered edge of teeth downwards.
4. Rub top surface of ring gear with emery cloth to polish it a bit.
5. Using an oxy torch, heat the gear evenly all round until it is a dark straw temper colour. Don't let it get to blue, it will soften it.
6. Using 2 pr of tongs or multigrips, pick ring gear up and drop it on the flywheel. Tap it gently and quickly if not fully seated.

Note- you will seldom get enough heat for this job with a Primus etc blowtorch, unless it's indoors and it's a warm day. Oxy is so much better as a source of heat. The last thing you want is to have it stick, 1/2 way on...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I've done this using the wife's oven. She wasn't impressed, but I talked her into it.

You only get 250'ish degrees, but I managed to get it on anyways.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

i did a ringgear in my clubby (came loose from flywhhel) - i just put another flywheel in i got off a mate

Brenton

Is it a stock flywheel? You can get an exchange for about $100 inc. pressure plate & flywheel re-machined. Unless you have all the parts already, then this is not good value

I think you will find that price is for the machining only.
A NEW ring gear alone costs $85+ direct from importer (Karcraft).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Mini and moke world Brookvale in Sydney 9938 2242 Do a flywheel and pressure plate exchange. You give them your flywheel inc. ring gear and pressure plate and they give you a reconditioned set for $99. You can't argue with that!

Is that with a new ring gear?
Or is it just dressed up with a grinder?
Or is it just looked at and passed as OK?

Do they use gloss black Reconditioning paint?

A lot of places forget about the ring-gear when they re-face the flywheel and backing plate for exchange.

You get what you pay for. Sometimes you may even get what you want.

Yes you do get what you pay and I paid $99 for a refaced flywheel that was not painted any colour. Its an option depending on your circumstances. If you are in broken hill and needing to replace a ring gear the postage may become an obstacle.