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the size of the ring will be determined by the bore size
so if it is a 3"(75mm) bore the ring will be that size if placed in the bore separate to the piston and pushed square and to the bottom of the bore the ring gap will denote if standard , worn or oversize to standard
new rings in new bores will have a ring gap of around .010"
worn rings will have a larger gap up to .040" and will have sharp edges where the ring lands wear the rings
over size rings in standard bore probably won't even fit in the bore to start with
ring sets are bought in standard size , .010" over size,.020" oversize,.030" oversize,.040" oversize with the oversize equalling the final hone of a machine bore
so if the machine shop bores the cylinder out to .020" oversize then you need .020" oversize rings to maintain the correct ring gap
from experience I have found that if I follow that rule , on measuring the ring gap at the bottom of the bore the ring gap is about .015" or half worn out
I counter this by getting the next size ring .030" and filing the ends of the rings at the gap to obtain the .010" gap This has produced better longer lasting repairs
I initially replaced the o-rings in the pipe/valve assembly. It didn't work for long (not correct size o-rings probably). I then bought a new pipe-valve unit. To replace you need to pry off the stream handle (chromed plastic). It only fits one way on the axle (so take notice when replacing!). Then remove back and side covers (6 screws all at the back). Then remove top (2 screws each side at the front and a couple at the back). Then the front panel should be lose. (Instructions based on a slightly different model)
Mine made better coffee after I fixed the leak! A large portion (perhaps 25%) of the water intended for the coffee went via the steam wand straight into the drip tray, which is not good.
Hi: Your problem is the convergence circuit, you need to replace the convergence Ic's there are two large black IC's mounted on a large metal heatsink. The part numbers are STK-392-110 replace them with the same part number or use STK-392-120 for better and long lasting.
Buy a new one with your local auto-supply retail shop.
Sometimes the o-ring is hard to find so it is better to bring the sample to compare the size well, it is not advisable to use an under-size/over-size o-ring.
If you can't find replacement you can use a high temp silicon sealant for the meantime to cure the leaking problem.
Hope it may help you.
Have a nice day!
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Yes under the new US/Obama deal you can get 4500 for it at a dealership if you buy a new car. The better the mpg of the car you get determines how much of the 4500 its worth. Other than that I would think 500 would be fair for a car that might not make it home.
How long have you owned it? Mine did the same thing. It was a dead spot which got worse. It was just past warranty (of course) but I took it back to Home Depot & they worked with me to get it replaced. Unfortunately, I think this is your only hope. The monitor dept. told me that once they get dead spots there is nothing you can do for them. Wish the news was better.