We have a 93 da that my girlfriend rescued for the purpose of making her a new track car. Its got a nice b20 although the swap itself left a bit to be desired.

Over the last few months I have gone over everything that I can. She has thrown big money at this car. Koni/GC, RPF1's Carbotech Sparco you get the idea. We are trying to get everything done in time for Hyperfest.

Today I took it for its first good shake down run and I get crazy oil burning blue smoke out the exhaust when I am turning. It clears up if you go straight for a bit...Its thrown a code ( i haven't checked it yet) But seems to idle fine and when Im going straight its fine. When we bought the car a few months ago I dont recall anything funny about the engine and how it ran. - A major reason why we bought this particular car-

I have searched and found a single thread with similar problem. It was thought to be an overfilled pan. Unless its grossly over (by the gauge ours isnt) I just dont see this being the cause. I havent added any oil nor did she

Please share your thoughts on this. I am really stressing trying to get this car finished and on track.

Thanks,

Zach

 

Pull the code first. That will tell you a lot about what might be smoking...

 

what color is the smoke?

 

Sorry. Its oil smoke. Blue. Ill grab the code tomorrow and see what thats all about. Thanks for the quick replys fellas

 

tHE PROBLEM IS MOSTLIKELY SOME BLOWBY AND ALSO CHECK OR REMOVE THE BLACK BOX BEHIND THE BLOCK. aND PLUG THE HOLE. ALSO CHECK TO SEE WHERE ALL THE HOSES ARE ATTACHED TO FROM THE VALVECOVER AND THE BLOCK INTENED FOR BREATHNG.


EDO

 

Sounds like Blow by to me too.
Don't panic yet, im betting its something that simple

 

Maybe the dipstick is not right for the block/oil pan. Maybe there's a lot more oil in the motor than there should be, but the dipstick isn't telling the whole story. If they used a B16 dipstick in the B20 block, I'm pretty sure the oil level would be 7mm too high (a little over a 1/4 of an inch).

 

Is this a b20 long block stock built ...Vtec head swap>?

more info

The black box is part of the pcv system why remove it ?

The dipstick is a good place to start. Also adding an aftermarket oil pan baffle would be a good investment. If the motor had blowby it would puff smoke especially in a straight line.

 

For starters read the code, then drain the oil and measure how much is removed. shouldnt have no more then 4 qts. If so, re-add 4qts and go for a drive and see if the problem clears itself.

Joe

 

iv measured a b20 b18 and b16 dipstick and found them all to be the same length ......
maybe im wrong? more info in this plz!

 

Thank you for the help guys. Answers to some of the questions
Its just a simple p8r head b20 non vtec.
The dipstick and tube is too long. It was bent to clear the hood. ( I didnt do this) I thought it would read normal even if its got an extra bend in it.
I bought a new PCV valve and thats going from the b20 vc to the intake manifold like it should. It was also my understanding that the B20's did not have the black box and the block is vented only with the PCV out of the head. The only other venting of the engine is the breather tube that goes to the intake before the throttle body
Is there any additional hoses that I am missing

 

The "bent to clear the hood" thing sounds really weird. The dipstick handle should be several inches away from touching the hood. I'm pretty sure you're correct about the B20 not having a black box as well, but I'll check on mine tonight.

 

Does it only do it if you turn left? You could have something blocking the oil drains on the head, so oil is getting sucked from the vent directly into the intake...

Sure its not a tire rubbing issue?

 

I didn't get a chance to try anything today. I was just too worn out from work to get to it. On the drive home, I took an open off ramp from the freeway and it happend again.
So it happens both ways, Sustained G's from exit ramps. Not quick stuff like in traffic or normal driving.. And I am quite sure its not tire rub.

 

Zach, CP here...

Pretty sure the windage tray loads up with oil during corners and oil will gather near the PCV outlet at the back of the head. It gets flushed out up through the "black box". Now, if the stock routing for the exit hoses on the black box is used, I think that goes back into the intake tract... in which case it gets ingested and you get blue smoke. Take an empty gatorade bottle, route the PCV box line into that bottle and run a few corners. If you get a bunch of oil pumped into the bottle... well, there you go. You know where it's coming from.

 

x2, make a temporary catch tank^^

 

Thanks Chris. Ill get a look at it in the morning.I just thought that the b20 did not have the black box. If that is actually true then what should I do?
Jayson West suggested that I remove the big allen head bolt plug thing in the back of the block and drill, tap with a fitting and run it to a catch can. Does that sound like a good idea.?
I will have a ton of time to mess with it tomorrow so I might find the problem staring me right in the face. I need to figure this out

Thanks for all the suggestions and help guys.