whys my briggs blowing smoke

[STreetKArt]

i got a briggs 5hp engine with a few mods welded cam,shaved eye brows, port an polish and other little stuff and i broke the oiler ring on the stock piston that i was ganna reuse. soo i used a 3.5 hp piston and rings and put the engine back together and it blew smoke ran the engine again for like 5 min still blowing smoke and then i shut it off and pulled the head off and there was like a 1/6" puddle of oil in the cylinder then i took it apart and and the oiler ring was pretty soft soo idk PLEASE HELP!!
THANKS ALL
oo and i couldnt buy new rings becuase, well i have three diffrent engines and three diffrent piston ring sizes in (thickness) and they all share the same piston ring part numbers.

 

[Kenny_McCormic]

1. Bad PCV valve
2. Its a old tired motor, run 20-50 oil.

 

[I like karts]

You now have a semi-diesel. Merry Christmas.


Jk, but you really do need new rings, not used ones

 

[jr dragster T]

Could be valve guide's too. Go up a REALY steep hill. If it smokes under hard acceleration its the ring's. If it smokes under de-celeration it's the guide's.

 

[KingCobra]

Maybe you have a scratched cylinder or maybe the gap in your rings are in line?Oil flows easily through rings where the gaps are not opposite of each other. Hmmmmm, good question. Maybe someone put oil in your gas.

 

[KingCobra]

Make sure you have rings match the ID or your cylinder and your piston so you have hardly a gap when installed. Your gap might be too big being a 3.5 piston w/rings of the same piston.

 

[Kenny_McCormic]

Could be valve guide's too. Go up a REALY steep hill. If it smokes under hard acceleration its the ring's. If it smokes under de-celeration it's the guide's.

It will pull oil through the intake guide on accel.

 

[jr dragster T]

Ring end gap should be 0.004"

 

[KingCobra]

I bet he has a wider gap. Maybe he will let us know later. Wouldn't hurt to replace them seals either.Anything larger than .004 would do it I bet. Doesn't take much with all that oil sloshin' around and getting caught in them rings.

 

[oscaryu1]

i broke the oiler ring on the stock piston that i was ganna reuse. soo i used a 3.5 hp piston and rings and put the engine back together and it blew smoke ran the engine again for like 5 min still blowing smoke and then i shut it off and pulled the head off and there was like a 1/6" puddle of oil in the cylinder then i took it apart and and the oiler ring was pretty soft soo idk PLEASE HELP!!

Course it's going to smoke. You're taking the rings from another engine and putting it in a whole new engine. Place the rings (take off piston) into the cylinder, note the gap.

 

[STreetKArt]

Thanks Everyone For The Responses And I Dont Have The Oiler Ring Any More But I Do Know That The Gap Was Bigger Than 0.004
Thanks
Jeremy

 

[oscaryu1]

Rings are like $15 on eBay. If this is an aluminum bore and has been used for some time, you might be checking into the oversize piston/rings.

 

[jr dragster T]

Yeah possably Oscar. I'm not too sure if it's so worn out a oversized piston will fit without boring.

 

[oscaryu1]

Sure it might need a boring, but that doesn't mean you should stick with a stock piston + rings and have a hugearse gap.

 

[jr dragster T]

Oscar, Not everyone can just go out and bore it out. Not everyone here like's to bore out with a honer.

 

[Kenny_McCormic]

Oscar, Not everyone can just go out and bore it out. Not everyone here like's to bore out with a honer.

If you have the time its the best way, perfect fit every time.

 

[jr dragster T]

If using a honer to bore out I dont think your bore would be very straight. somone said they wanted to bore like that before and I recomended not doing it then Russ chimed in and said same.

 

[Kenny_McCormic]

What I mean is if you start undersized by a thou and do the final thou with a hone till the piston fits the piston/bore slop will be tighter and the motor will perform better(better piston-jug heat transfer). If you take in a jug and tell em to bore it to X its not gonna be perfect.