Ok so got a little problem with oil burn. I just changed the oil a little under a month ago with 10w-40 synthetic and new filter. I did a compression test about 6 months ago and i was reading around 230lbs in each cylinder. I dont run my car hard, i dont dog my car. When i do put my foot down i shift at 7k and not an rpm more. So she is pretty much babied. Never cracked open the block only took the valve cover off to replace the cam seal and the valve cover seal. Now here is my problem. Im burning oil when i downshift (granny style). For example, i was driving home from work today i was in 5th dropped down to 4th rev matched to about 2k and then let the clutch go and then boom cloud of blue. then it stopped shifted to 5th no smoke. Then stopped at the next red and then drove normal away from the light no smoke whats so ever. gave it a little gas too about 3.5k and still no smoke. I driving this thing 20-30 miles a day, i shift at 2,500rpm i change my fluids every 3k miles. Idk if its valve adjustments or it needs a full rebuild. I just need to know so i can properly prepare for the job at hand. cause this is my DD and it cant be down.

 

Well it could be a multitude of things. I'd suggest a leak down test first to better pinpoint the problem. Are you sure it's blue smoke and not black? When you engage VTEC does it throw blue smoke?

 

now by leak down test you mean? and i definitely see its blue smoke and no smoke is thrown in VTEC at all i know cause my buddy doesnt see any when i pass him

 

A leakdown test that you connect where ur spark plug goes and run compressed air to see where the air comes out . That would let you know where you problem is

 

I over simplify things a lot, but damn that's horrible.

** How To - Leakdown Test ** - Honda-Tech

 

It happens, Honda's tend to burn oil at different RPM even if they are in good health. If you have no smoke at all in VTEC or coming off of lights then your piston rings should be fine. One of your valve seals might leak a little bit, but see if you can replicate the car smoking, and see the conditions where it does burn oil and write it here.

 

I have a very similar problem with my 00 si with b16, only mods are i/h/e and type r cams. My car only burns oil in v-tec and at no other time that I can see, the smoke is like a black cloud when I run it hard. I have a new block Im building and Im curious if its the rings or the valve seals cause I plan on using my current head. Sorry not trying to thread jack you just thought I would ask while we are on the subject.

 

My bet is your rings are dead

 

Thats kinda what I figured so I guess its a good thing I have a new motor in the shop. Hopefully a nice build/restoration thread of my em1 with come pretty soon.

 

black cloud has nothing to do with rings. That means that its running rich, usually what happens when u have a bad tune.

 

well i cant replicate the smoke off the fly, but it happens atleast once a week. but now that im thinking about it. it seems to be that prolly either one of the valve seals are bad or the valve springs are sticking but it seems to be somethign in the valve train that is letting oil into the cumbustion chamber. because if it was rings it would smoke at idle and at low rpms, all the time not just whenever it feels like it

 

yea i know. I remember my motor would always smoke in the morning like it was blown lol. it would blow smoke everywhere for a couple minutes. Then it would be fine. if you aren't losing oil then I wouldn't really worry about it. Especially if you cant replicate it easily.

 

Try checking your PCV valve, and the ventilation tube at the back of the valve cover. could be something to do with that. Could have been a fluke, oil bypassed the PCV or sucked through the vent tube into the intake? Had similar thing happen in my truck once, all i could find wrong was a nasty PCV.

 

you're right its possible that it is the PCV causing this.

 

ok does anyone know how to change the pcv valve. cause i cant find a description anywhere. and i dont wanna start pulling **** off.

 

It's fairly easy. Locate this hole and pull the valve out with your hands or pliers:


In this picture the PCV valve is removed and laying the fuel rail (left side of the picture)

 

The pcv valve is located down by fuel injector 3&4. It plugs into the intake mani and has a hose coming off it that connects to the upper portion of the intake mani just to the right of the throttle body.

 

^haha lol...1 minute late...ej8man beat me to it

 

change it and let us know

 

alright awesome guys thanks for the info. im gunna go hit honda in the morning and go get that valve and swap it hopefully it fixes the oil situation. ill keep you guys posted

 

 

?

 

If it only burns oil when you down shift it could very well be from your valve seals, does it smoke at all on start up after sitting for a while?? I would ditch that crappy stock PCV system and up a decent crank case vent can on it. B series are known for having oil burn issues in high rpms due to the stock PCV.

 

but it doesn't burn every downshift. and it doesnt smoke at start up or when ive been driving a while. for example i drove all day friday doing errands in 95 degree weather, and it only smoked once and thats because i dropped to fourth to pass somebody. but something tells me re vamping the catch can isnt really necessary if its a stock motor.

 

did you change the PCV yet? And isnt it possible that its always done it?