Help Rebuilt Issues!! Oilll smokkee

[labcoatmonkey]

Dear nico members......................
My car is blowing egzesif ammouts of blue smoke when decelerating sometimes but not on idle...after a fresh OEM motor rebuild.
I have finally had time to drive the car and break it in, just ran the motor to adjust timing and tension. Now Im driving the z and when I go easy it wont smoke. If I decide to lay on the throttle a bit, it will smoke a little blue sometimes not at WOT, when I decelerate it starts to smoke alot. I become engulfed in my own weather system if i slow to a stop sometimes (maybe not that crazy) but its quite bad and embarrasing. The mechanic told me it runs a LITTLE rich in the PS bank and swears that its the piston rings.

Could running a little rich cause improper ring seat? Seems possible...

The motor idles fine and doesnt smoke but once you rev it to 2000rpm it will blow blue smoke out. The guy recommended just punching it a bit for 300 to 500 miles or for a while and it should seat the rings. I know this a common problem but most rings seat well on the first 30 miles of leadfooted driving, right?

As a last resort I have heard people mention Bon Ami or other abrasive dust and claim it wont damage the motor if its just a little bit to help the rings seat.

Could it be that a valve seal isnt holding adequate pressure from the vacuum and sucks in oil?

Please someone shine a light on this one I searched and not much help..

[marty1mc]

First, if you are on a fresh rebuild, you shouldn't be going anywhere near WOT. You should be following a break-in routine. Your post seems to indicate you are stressing the motor before it's ready.

Pull the plugs and look at them. If they have black on them, feel it. If it smears on your fingers, it's oil. If it is crusty, it's fuel.

Next, do a compression test and see if all of the cylinders are in range.

[robomatic12]

So how many miles since rebuild? You shouldn't be any where near WOT as marty said if it's pretty recent ago. The rings haven't seated and will burn excessive amounts of oil if you try to push the engine. Don't rush breaking the motor in now, or you'll be doing this all over sooner than you want too.

Were the turbos replaced during the rebuild? Or if they are the same turbos, did they smoke ever before?

[labcoatmonkey]

Im waiting for the leak down and psi kit so I can check the compression next week. I followed the breakin procedure as close as i could... drove it under 45% load thats less than half WOT, for about 100 miles shifting up and down fourth from 50mph to 40 and from third to 50mph then slow down and punch it with like 60% WOT. Then my mechanic suggested just drive it under heavier conditions and basically spank it a bit so the rings will seat over 500miles or so. Valve seal is also suspect because i get no oil burn on acceleration even if i do 80% WOT. if not then its the oil rings, in which case I hate my life.

Were the turbos replaced during the rebuild? Or if they are the same turbos, did they smoke ever before?

Yea they are rebuilt stock turbos with bigger cold side they arent burning any oil. If its valve seals then its a bit of a relief but will be a PITA of a task.

[robomatic12]

Were the cylinder heads touched during the rebuild at all? How do you know they are not burning any oil? (turbos I mean)

[labcoatmonkey]

the mechanic checked said the turbos were fine no oil leak in the seal... the oil burning only happens when I shift down... aka high vacuum state, so Im assuming if its not the rings then it could be the seals. Turbos would burn oil on acceleration too.

the compression seems to be good, the motor runs like a swiss watch but burns oil like its a song when decelerating at above 2000rpm.


Weird thing I noticed today, if I open up the DriverSide BOV and let in air, the motor will bog down and stall or irraticate... but if i do that to the passengerside BOV, there is no change in idle, yet all the cylinders are firing... thats it pullin the plug time =) the compression/leakdown kit should be here tuesday...

[marty1mc]

Have you pulled the plugs and see if it's one or more cylinders?

[J30tChumpCar]

Is it possible you have a mis routed or other PCV system issue?

[es.biggs]

Any updates monkey-mannn