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[Steve B]

Do i put the stepped one on top 

[henryd]

Yes

[omega3000]

Yes

Why is it stepped 

[henryd]

Yes

Why is it stepped 

There will be a wear ridge at the top of the bore,if a full ring was fitted it would probably break when it hit the ridge hence the step so it stops just short

[omega3000]

Yes

Why is it stepped 

There will be a wear ridge at the top of the bore,if a full ring was fitted it would probably break when it hit the ridge hence the step so it stops just short

Excellent , thanks henry .. learn something new every day .. probably why the head got blown off my cz175 30 yrs ago 

[Steve B]

Yes

Why is it stepped 

There will be a wear ridge at the top of the bore,if a full ring was fitted it would probably break when it hit the ridge hence the step so it stops just short

Thanks there...could not work out why it came like that .

[Marks DTM Calib]

Its a bit of a low cost work around in reality, if a bore is really stepped then it wants reboring, they realy should be honed anyway which would remove any light step.

[omega3000]

Its a bit of a low cost work around in reality, if a bore is really stepped then it wants reboring, they realy should be honed anyway which would remove any light step.

Do all rings come with these steps , my thinking is if there was no step in the first place a build up would not occur 

[Marks DTM Calib]

Its a bit of a low cost work around in reality, if a bore is really stepped then it wants reboring, they realy should be honed anyway which would remove any light step.

Do all rings come with these steps , my thinking is if there was no step in the first place a build up would not occur 

No, standard rings are not stepped.

What can happen is that you get bore wear where the ring runs and hence the top of the bore has a setep. Fit new rings and they can smash into the step and crack the rings.

Most modern engines dont suffer such wear and hence a light hone means all i good again.

If you want to see how bad it can be, take a Ford pushrod lump apart from a Ka or older Fiesta.

[Andy B]

....
If you want to see how bad it can be, take a Ford pushrod lump apart from a Ka or older Fiesta.

I've never ventured inside a Ka engine, but I belive they're basically a Kent engine (of the MKI/II Escort etc era  )

[Steve B]

the piston and rings above are going into a  1976(R) honda C90