Blue-ish smoke from exhaust

[gunmetalrps]

i just wanted some feedback.

its a sohc KA. had a rebuilt, resurfaced head, new valve seals/guides about March 08. also new headgasket. its not blowing a lot of smoke only when im at full throttle around 5.5k-7.5k rpms. not overheating AT ALL. still pulls strong. if i drive normal theres no smoke at all. when it does smoke its kinda blue-ish. im thinking piston rings since the block is at about 190xxx. but what about 02 sensor or fuel mixture running rich. i know it cant be the valve seals or head gasket. also, it doesnt seem to be losing much oil( even though the oil pan is kinda leaking oil)

any ideas?

[ATLspeed]

i say it may be your rings, check compression

is the CEL on?

[Alpha Residence]

could be something as simple as bad spark plug gaskets as well.

[gunmetalrps]

spark plug gaskets? can you go more in-depth?

[The Chad]

He means the rubber rings/gaskets that run along inside the Valve cover. They usually come in a set with a new valve cover gasket. I honestly would say piston rings though. I'm having the same prob, but mine does a quick puff on start off too.

[fliprayzin240sx]

Do a compression, better yet, leak down test to see if its the rings...

[rex2sx]

Dont do a compression test. Compression test is for compression rings. Leakdown test would work better. But since you said the head as new guides and seals the only thing i can think of is the tube seals. Ill check around for ya.

[xsparc]

spark plug gasket???? um ok...

on a SOHC with what you say "blue smoke... high rpm", it means 1 or 2 things....

piston rings and/or stem seals

and since you said you have new stem seals then that leaves only the rings.

[redpotatoes]

If there is not much smoke it might be your valve seals. Even if they were done in march 2008, maybe something is wrong there...