About a week ago while driving I noticed white smoke coming from under the hood.. I had zero power loss, the car did NOT overheat, everything seemed fine, it just idled a little abnormal. Once stopped I popped the hood and the smoke was coming from the crankcase breather valve on top of the valve cover. The car has 60K miles and last month it got turbocharged. I immediatley called the tuner and he said detonation caused it and my piston rings were fried. another tuning company told me it may just be my valves are in serious need of an adjustment, as they can cause smoke from the same area. has anyone else had this problem? if so what was the outcome? P.S. my car made 373 rwhp on 10 PSI on the stock HG. thanks guys.

 

what you described happened to a friend of mine, but in his turbocharged Civic. at idle you can see the blowby coming out of the breather. In the end we took the engine apart and the rings were bad, and his valve guide (exhuast side) were done... hopefully this isn't your case. good luck

 

You got smoke in your valve cover. Not where it is supposed to be. Have a compression and leakdown test done. This will tell you if it's your rings, which it probably is.

 

Does it steadily smoke from the breather at idle?

 

sounds like worn rings to me my brother. combustion heat and gases pass the rings and head for the pan. from their its forced out of the PCV as it is extreme crankcase pressure from combustion making it there.

 

alrighty then sounds like teardown, bore to 87.25 (provided I didnt screw the cylinder walls) and slap in the new mahle gold series pistons.. thanks for the help guys, and yes go-autoworks it does steadily smoke at idle, then lessens or stops while driving.

 

It's probably the rings as everyone else said... Just went through this with an NSX motor unfortunately.

 

Damn, well thats why I posted my coilovers for sale.. need to save up munnies now lol!

 

My catch can on my built motor smokes every now and then and I can really smell the vapors after a boosted run. Is this ok? Compression and leak down arevperfect.

 

Doubt it's the rings, it's prolly the ringlands. The area between the rings. Valve seals don't usually smoke @ idle, only WOT and decel.

Or you could have tapered the cylinders, which means the pistons/rings can't seal and you are getting blowby.

If the compression numbers aren't bad, you can continue to drive it and not worry until you have time for a rebuild.

Mostly like, it's going to need pulled and repaired regardless of the problem.