Hi guys. I've been researching on possible reasons why my car still smokes.

FYI, I have just rebuilt my engine two weeks ago. I had some trouble starting the car but resolved that because of improper grounding.

I also had problems starting when warm but it has resolved itself.

I'm now trying to troubleshoot why it's still smoking. I checked the oil filler neck and the top one is capped along with the corresponding nipple on the UIM. However, the bottom one is not capped but looking at the primary turbo elbow both hoses are connected and go to the hard lines.

My question is would not connecting the bottom oil filler neck nipple cause my car to smoke a lot? I know it's oil 'cause it smells like it and I have to fill up 1 quart of oil every 100-150 miles.

Any help would be appreciated. Thanks!

 

well you need some form of case ventilaion. them being capped is bad. 1 quart every 100 miles is a seperate problem. turbos, oil controll issue

 

Probably as it may be causing oil blowby on the turbos; you are not creating the required vacuum for the oil system.

~Attila

 

I've read some other threads where people capped 'em with no problems. BTW, do you know which hard line for the bottom oil filler neck it's supposed to go to?

Thanks!

 

you sure you put the oil control ring springs on the rotor right? tends to smoke when you put them in backwards.

good luck

 

I'm pretty sure. I followed the RA video to the tee. I also double checked with the FSM. Round tab in the hole. Square tab facing upwards. Right?

 

I had the same problem a week ago....car would'nt idle during acceleration, just while idling. I pulled the hose off from the top of the oil filler neck and it stopped. hose must have been clogged.

 

if those are capped then they have the vent set up somewhere else. the blowby needs to be vented somehow

 

As long as one of the nipples on the filler neck is either OPEN to the atmosphere,OR fed to the air filter side of the turbo you will be fine. As far as the engine case venting goes. Mine is the exact same way and it is fine

As far as the smoking and oil consumption go, It really sounds as if you have either incorrectly assembled/seated oil control ring/seal OR badly warped side housings that did not get lapped or checked closely enough. An odd one may be the oil o-ring on the front e-shaft bolt. I had a reman show up without that once. I didn't start it though so i don't exactly know what the symptoms of that would be.

I am not bashing your engine building at all. I have done worse on my own when i first started.

 

Yes, thats right. But there is a front and a rear. Even if you have the square up, if its not facing the right way the control ring wont lock with the rotor.

I'm not saying you did, but its a mistake that i seen a couple of times. But its smokes alot when this happens.

 

You can bash all you want....it's still my first engine I've ever rebuilt. I'm going to get my engine compression tested this Sunday. I'll find out if I did something right or wrong.

It's still possible that the old parts I used weren't that good at all. I checked with the dial indicator but when you have a small magnetic base that's kind of wobbly, it kind of makes it hard to measure.

I do have one other question, I remember measuring the end play on the eccentric shaft and if I remember correctly, it was really off. Would that cause the smoking issue?

Thanks for any help again.

 

[QUOTE=chillin_rx7_guy]You can bash all you want....it's still my first engine I've ever rebuilt. I'm going to get my engine compression tested this Sunday. I'll find out if I did something right or wrong.
QUOTE]


I said I am NOT bashing the abilities. I have done FAR worse when i started. That unfortunately is how you learn. One hardly ever gets it perfect the first time.No matter how hard you try to.

I should have chosen better words to describe that there may have been "bad old parts" reused. The tolerances are so close that even a slight miscalculation can cause wierd things to happen.

AGAIN I am in NO way trying to say you can not build a engine. If you like I can send you some pics of a few of my mistakes on all sorts of engines in the past... It happens to everyone. even Steve Kan i would imagine.

 

No problem. I didn't taken any offense to it. Hope I can figure out the issue soon. I would like to drive without me feeling embarrassed driving it around (smokescreen)....

 

At least your home town won't have a mosquito problem for a while Just change your plate to BOND and your all set.

 

Here's an update with my smoking issue. I tried removing the oil cap to see if that would relieve the crank pressure but that didn't do much.

Since my car has been driven over 500 miles now, I decided to go over 4K in RPM's on the freeway. Well, once I slowed down to the traffic light, no smoking at all? Even when I started to roll again, no puff of smoke. Now when I let the car off for about 1 1/2 hours, I started the car again with smoke and when I'm at idle it would smoke but when I went back on the highway and went over the 4K RPM to start my breaking in of the engine, no smoke when on deceleration. Even at idle, no smoke.

Any suggestions or clues?

Thanks!

 

Here's some more info, it looks like my car smokes when the injector cycle goes to 0%. Also, when I leave the oil cap open, I can see smoke come out. Any ideas?

 

connect the bottom nipple to the primary turbo if you haven't already...

 

^ that is not the problem read earlier posts about how that "needs" to be. he has internal sealing issues i believe.