I've done many searching, but still could not find a solution to my problem. I drive a 99 civic with a gsr motor. Around last February/March, one of my valves got chipped. So I replaced all the intake/exhaust valves with some OMNI ones and a new headgasket. Oil kept leaking by the engine stamp and the cam gears, so I replaced the cam seal and valve cover gasket. Fixed all those problems, but then when I am revving high, there's a ton of white/gray smoke. Don't seem to be a loss of coolant. Plus, when I am driving pretty fast, once you let go of the gas pedal and step on it again, I see puffs of blue smoke. All this doesn't happen if I'm driving regularly. Long story, but help me out people. I'm going crazy about this smoking issue.

 

Bad valve seals/seats? Did you deck the head? If not it might be uneven and not sealing right.

 

blue smoke= oil entering your combustion chambers.
white smoke= coolant entering combustion chambers.

you could be experiencing residual oil or coolant that dripped into your cylinders and it might just burn off.

but NACvicSi may be correct, something may not be sealing correctly.

Are you losing coolant and oil?
Did you get your head resurfaced when you replaced the HG?

 

I'm guessing worn exhaust valve guides themselves and possibly worn out valvestem seals.

I'm moving to All-motor for more help.

 

???

 

I didn't get the head decked or anything, but I did notice that the coolant passage that is around the cylinders in the block has mixed oil and coolant though. I asked a couple buddies and they didn't know whether that was ok or not. What do you guys think? I already planned on replacing the valve stem seals for now as well.

 

oil and coolant mixing, generally indicated an improper seal between the head and the block (HEADGASKET). My vote goes toward something wrong with the HG install, you're supposed to take the head to a machine shop to be resurfaced when you do this job.

 

^ Yep, and I would use some copper spray sealant for that extra peace of mind.

 

i had the same problem. when u let off the gas and get back on it the car will shoot smoke. For me it was everrrryyything, headgasket and piston rings haha i just fixed it too my thread is up there called blow by smoking. But i had my headgasket fixed few months before i did the rings. I was loosing coolant, but if you say its blue smoke your valve seats might be bad. Rings could be a issue if you loosen them afterwards. Leakdown test it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Team PHATBOYZ &raquo;</TD></TR><TR><TD CLASS="quote">I didn't get the head decked or anything, but I did notice that the coolant passage that is around the cylinders in the block has mixed oil and coolant though. I asked a couple buddies and they didn't know whether that was ok or not. What do you guys think? I already planned on replacing the valve stem seals for now as well.</TD></TR></TABLE>


your headgasket needs replacing or your head isnt surfaced right. if im correct upper rpms black/blue smoking is your rings. if you smoke black blue down low or lower rpms its your valve guides. had a car that did that. just have to use more oil haha.

 

start with a compression test and let us kno from there

 

I did a swap in my 99-00. I'm having the same problem too right now. Please post if u fixed the problem. Mine is blowing white or grey smoke. And I replace the head gasket the third time already. Hahaha. Crazy. Team phatboyz post up if u the solved problem bro cuz I'm On The same chapter as well. Or anybody with some good advise will help.

 

If you are seeing smoke when decelling in gear (engine under high vacuum), then you're burning oil. This is a normal phenomenon. However, if you're consuming more than a quart every 1000 miles, you have worn valve seals/guides. The reason this happens is because the throttle is closed, and the pistons are moving up and down causing a high vacuum in the engine. Some air still gets passed the throttle, some air reverses back in from the exhaust, and some air is pulled passed the valve seals/guides, along with some oil.
It is not good for an engine to be ran in vacuum at high rpms and should not be done anyway. That's the problem. If you must coast for a reason, either clutch in, or put it in neutral. Problem solved. If you continue to coast in gear, this will occur every time.

I see it happen all the time...all these kids with aftermarket exhaust downshifting into every gear when coming to a stop light as if they were autocrossing or roadracing...when all theyre doing is burning up they're seals/guides, consuming oil, reducing the life of their engine, and looking like morons.