Piston Rings
Turbo Mini Forums

Hi
sorry if I repeat myself but I am desperate as it is my every day car and my holidays are ending after 1 week! :/ not much time left :/

I have standard metro turbo A engine

I broke piston rings when was putting in third piston!

Can I just put one of these??

1.

2.

3. http://www.minispares.com/Product.aspx?ty=...id=33584&title=


I just wanted to change for standard one and complete my engine as soon as possible.


as my budget is not sky hight looking for cheapest but safe way!!

what would you do in my place!!!!


THANK YOU A LOT FOR HELP IN ADVANCE!!! :)

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maybe any other place where to buy!!

thank you!!

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is it ok if i will buy 1 set of new rings for 1 piston and will build my engine with 1 new and 3 my old ones?

or there could be issues with that?

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what is your piston Id?
do you want to rebore your engine or not?
why did you removed the pistons?
then if it's just a question of rings,
why do you want to change the pistons and not only the rings?
and then why would you want to change only one piston rings and keep the three other old ones as you'll have a set of four ?

have you taken the piston to an engine machine shop, ?

they can and did size up an entire set of rings for me for a set of pistons i would assume all machine shops have this ability

Yes i moved to the darkside

Instagram @jdm_brett

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i start to think about re-bore my engine an buy all set with pistons and rings, but i not sure if i will have enough funds :(

how much could cost to re-bore engine to +0.20 or +0.40???

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just cost me 65pounds for mine, rebore to +20thou ( 0.020)

my rings 4 or 5 years ago was 80 quid ( but was not available anywhere else to buy)

Yes i moved to the darkside

Instagram @jdm_brett

do i need to search for special garage who does rebore ?

maybe can suggest someone in london or close to m25?

thank you

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Schrödinger's cat - so which one am I ???

I asked about piston id, as there's two rings height possibility , 4mm oil control and 3.5mm ones,
which one have you got?
I can't see the point to rebore an engine if you don't need it, just buy a set of rings,even if you don't have the oil control one, you'll have both fire and compression rings. Doing only one piston when you'll have a set of rings, why not changing all four pistons??

Then have you checked on TMF, sure you'll find your answer.

i just want to do everything properly as after 2 weeks i am going for 6k miles euro trip on my mini!

do not want to stop somewhere :)

as engine almost striped already and rebore costs only £100

i think it is better to refresh my engine on +20 and to buy new set with pistons and rings and use my old conrods.

or to buy all 4x set rings and to do honing, it would be better as i do not have enough funds :/
only problem is that i can not find original standard metro turbo piston rings :/

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before you decide which way you will go, and before I agree to sell and send the single ring pack to you, provide us with the piston part number (It is stamped on the top of the piston), as already suggested.

6000 miles on a fresh build, mad, dont forget to pack up filters and oil,

Yes i moved to the darkside

Instagram @jdm_brett

it is 20831 - 1D9 on the top A

what kind of info this nr give?

i am looking for cheapest option, but safe as well :)

i am planning to rebuild my engine after 10k miles so i hope the option what i will choose will work so long :)

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20831 pistons should have 4mm (3.8mm) oil rings and 1.6mm compression rings.

so the question still remains, rings do you require? I suspect you have broken a compression ring and as such, the oil rings should still be OK.

I have one full set of rings for only one piston, that is to say there is only enough rings to replace those on one piston, NOT four pistons. 1,2,3 rings, top, middle, bottom, for just one piston, no more. These rings I have are 1.6, 1.6 and 3.8mm

And, not to sound daft, but you are aware that fitting new rings should require the bore to be re-honed to ensure the new rings seal correctly?

Also consider that these rings I have may not be absolutely identical to the original rings you have, but should at least be the correct size for a 20831 piston.

I am begining to get the feeling of uncertainty about your ability to build this engine back up to become a reliable motor that you hope it will be (I could well be wrong though). I don't mean that in a bad way, but i will take no responsability for anything if you decide you really do want these piston rings, but you have to be sure that they are what you are after.

strange but i have 3.5 ones :(
maybe someone changed them before.

if i will fined new rings 100% i will do re-honing.

but the problem is to find these rings :(

if i will not find new ring i am thinking about rebore +20

however i am not sure which pistons to buy??
and can i use old conrods with new pistons +20??


did you sold your piston set?? I am so upset that i missed them :(

Edited by chominsh on 24th Jun, 2010.

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it is unbelievable! I can not find piston rings:(

what you would suggest to do?? :/

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Metro Turbo, and MG Metro have been out of production since 1988 -1989 ish, which means the engines are over 20 years old, and pretty much worn out. There is little demand for new rings for these engines as most will need a rebore and an oversize piston, which is why no one makes a standard size piston, never mind rings for them.

Best thing you can do is to fit new +0.020" pistons and rebore the block.

If the engine is low to moderate tune, standard compression ratio, you can use the AE 21253 with good reliability. You just have to be sure that the compression ration is measured and calculated correctly, otherwise you could end up detonating them.

I feel a whole chain of questions will now follow from this one post that a decent search would easily find.

hmm, yea if i definitely will have few questions about pistons and not only :)

it shame to rebore now :(

would love to do that later on when i will have spec what i want and money to spend :)

I found these ones, called them and they are saying that they will do for metro turbo! will they?





i think i will re-hone and fit them, and after 15k miles will do rebore, new pistons, camshaft, crankshaft...

Thank you for help and info!! :)

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