Piston ring identification

[redrover]

I may have secured a set of piston rings with part number:
564226.
Can anybody confirm what engine these are suitable for. There are 3 packets (some opened) and 14 rings in total.

Would these be any use on their own or are some things missing?

Thanks

[redrover]

Ignore my last post. I've let them go as they didn't seem right to me.

I've now found a set suitable for a 2000SC/TC in +20 thou size. My engine hasn't been bored out (what's the point unless going to 2.2?!!). Does anybody know if these rings will fit in my engine, or are they too big? I'm planning to hone and deglaze the bores, and in theory piston rings shouldn't touch end-to-end around the piston anyway, so will these fit?

Thanks,
Michael

[harveyp6]

20 thou oversize rings won't fit on to standard size pistons properly, and if you get them on the pistons they won't go into the bore, and if you do get them into the bore, you won't have the correct ring gaps.
(I should have just asked "What are you thinking!!")

I knw a bloke who had a big end knock, so he had the crank measured and it was worn by just over 10 though, so he fitted a set of 10 thou undersize bearings without grinding the crank and was then surprised when he couldn't turn it over because it was locked up solid.

[redrover]

Thanks Harvey. I had a feeling that would be the verdict, but was being hopelessly optimistic about it!
You're right, when dealing with these things, seemingly 'small' tolerances make a *massive* difference, so I think I should revert to plan A - buy the proper stuff from a proper dealer and get it properly sorted for the long-term!

Cheers

[robgee1964]

Whilst the +0.020 rings will indeed be too big for your bores, it should be possible to reduce the gap. There are special grinding tools available (you could probably borrow one) or an engine machining shop should be able to do it for you.

It all depends how difficult it is to find rings.

Have you measured the bores though? Unless the bores are really good, or your on a super tight budget, a rebore + pistons is usually on the cards for most engine rebuilds.
If you get stuck I've a set of genuine +0.020 pistons + rings here, which I was goign use to rebuild my spare engine. However its looking more like I might just sell everything (including the one of the cars), as I may need to clear some space for another project.