Reringed 220 gets tight

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TDezso
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Reringed 220 gets tight

Postby TDezso » Sat Mar 04, 2017 6:33 pm

Put two new jugs on and found 3 broken rings. Reringed all cylinders. Now when it gets hot it lacks power and doesn't want to idle. Seems like it's tight. Anyone have any ideas?


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Gary S
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Re: Reringed 220 gets tight

Postby Gary S » Sun Mar 05, 2017 6:45 am

Did you fit the rings in the jugs to make sure you had correct end gap?

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Sun Mar 05, 2017 12:51 pm

I did. I set it to the tight side of the specs though. I'm gonna run it today and see what ones are running hot when it gets tight and open up the gap. I'm pretty sure one of the new jugs is chrome. Wonder if that could be an issue.


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glades cat
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Re: Reringed 220 gets tight

Postby glades cat » Sun Mar 05, 2017 2:08 pm

Did you re-hone the steel cyls when you installed the new rings? You have to start with a fresh hone every time you install new rings. The new peaks seat the rings.
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TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Sun Mar 05, 2017 2:27 pm

Deglazed the cylinders while they were out. The two I replaced are running about 50 degrees hotter than the other 4


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Gary S
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Re: Reringed 220 gets tight

Postby Gary S » Mon Mar 06, 2017 6:55 am

Did you use the same rings in the chrome cylinder? Also did you check ring land clearance?

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Mon Mar 06, 2017 11:21 am

I used the same rings for all cylinders. I'm not sure if I have one chrome or not. It just looked different and wouldn't hone the same. Like it was a harder metal. But Im gonna pull the two hot jugs and check them out when I get a chance.


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Gary S
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Re: Reringed 220 gets tight

Postby Gary S » Tue Mar 07, 2017 7:20 am

You can't use chrome on chrome. Check your pistons while you have it apart. Also check for intake leaks.

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Tue Mar 07, 2017 8:26 am

Pretty sure the rings aren't chrome. They are standard from duccara. Intake and and exhaust have no leaks. All upper end seals are replaced and new boots on intake tubes.


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diesel250rr
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Re: Reringed 220 gets tight

Postby diesel250rr » Tue Mar 07, 2017 8:34 am

Chrome should look like fine China little hair line cracks on it

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Tue Mar 07, 2017 9:33 am

That's what I heard. I've got one like that.


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TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Wed Mar 08, 2017 9:04 am

So do I need special rings for a chrome jug?


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diesel250rr
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Re: Reringed 220 gets tight

Postby diesel250rr » Wed Mar 08, 2017 1:16 pm

I believe you can't use chrome rings and a chrome jug they won't seat one of them rings or cylinder need to wear in

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fragwhacker
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Re: Reringed 220 gets tight

Postby fragwhacker » Wed Mar 08, 2017 3:33 pm

I was witness to the use of chrome rings in a chrome cylinder. With in an hour of run time grooves were cut into the walls of the cylinder, pistons were Chipped scarred and ruined, and the new rings were also chipped and broke. The cylinders became extremely HOT while running.
When the manual says chrome on chrome will cause catastrophic failure. I can see why now, any more run time and I think things would have turned bad quickly.

You can possibly hone the cylinder out and put the correct steal rings in it still

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Wed Mar 08, 2017 5:17 pm

Well, I'm pretty sure the rings from duccara are steel rings.


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Gary S
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Re: Reringed 220 gets tight

Postby Gary S » Thu Mar 09, 2017 8:58 am

You need to check your pistons ring lands. If they are wore it will let hot gas go around the rings.

TDezso
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Re: Reringed 220 gets tight

Postby TDezso » Thu Mar 09, 2017 10:34 am

I'll check when I pull them off


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