Breather and rings questions

[wbilotta]

Is it normal to hear a hissing sound coming out of the breather ? I just replaced it and I don't remember hearing this noise before.

I can hear it when I'm cranking the engine over.

Also, can .010 oversized rings be installed on a stock piston ? If so, it looks like the only rings available are the regular rings which I think are not chrome moly. I thought I read that if you use chrome moly rings you don't need to deglaze the cylinder but if the rings are not chrome moly than you do need to deglaze. I'm having trouble with oil up in the head and I replaced the rings with standard chrome rings and I'm still getting oil. How long does it take for rings to seat?

I don't have a bore gauge so I can't measure the bore to see if it's worn out. I'm going to check the valve guides tomorrow with a go-no-go stick, maybe it's the valve guides that are letting the oil up in the head. The intake valve stem looks dry and the exhaust valve stem is covered with a black sooty material.

Starting to get a little frustrating....

 

[EagleTalons]

Yes .010 can be installed, but you must file fit them. or else the tolerances will be too small. My exhaust valve on my briggs 130202 is black too, but from running a bit rich.

The hissing sound could be your compression release. Did you lap the valves?

 

[wbilotta]

I did lap the valves but I think the hissing sound is mostly being caused by the big end gap on the rings.

I'm going to find a set of Briggs .010 rings and have a local shop cross hatch the cylinder and we'll see what happens.

 

[Kaptain Krunch]

The hissing is most likely compression release...