aasarsak

iTrader: (2)

Just replaced the valve seals, and rechecked compression. I got 225 225 200 235. Adjusted valves to .006" intake and .007 exh. set timing to 15*.

B16A

Still have blue smoke.

What could it possibly be?

lude98SH

Rings. A compression and leakdown test will only show the condition of your compression rings. Not oil control rings.

aasarsak

iTrader: (2)

Awesome.

What is the diagnostic procedure to confirm?

Scott_Tucker

Generally, blue smoke during hard acceleration indicates faulty oil control rings. While blue smoke during deceleration and on startup after the engine has been off for a while indicates faulty valve guide sealing either from leaking seals or excess guide clearance. As a previous person said, a leakdown and compression test will tell you nothing about your valve guide seals or your oil control rings.

aasarsak

iTrader: (2)

Great, so it sounds like another crapshoot

Thanks for the info. I'm boosting anyway, so now might be a good time to upgrade my pistons...

lude98SH

x2

aasarsak

iTrader: (2)

sea foamed it today to see if maybe that would make the smoke worse by removing the carbon buildup that may have been making it run fine so I could have a definitive answer as to whether it was the rings or not. No change. Idles slightly better.

I don't notice any smoke at all during acceleration. This is wierd because it seems to be contradicting what everyone has been saying.

Checked vacuum lines again. Turns out I had my PCV hooked up to a vacuum source that read 2 - 3 mmHg. Not enought to allow the crankcase to breathe.

I had switched it to another source that I thought was vacuum. I should have checked it BEFORE I switched it. Only reason I switched it was so I could run my BOV to a better source because it wasn't blowing off properly.

Funny thing is that now that I think about it, it only started smoking after I made the switch.

I hope it's not too late, but I put everything back the way it was before.

I fear that the inability of the crankcase to breathe may have caused damage to my rings already.

I tested the PCV valve. It is shot.

Will replace PCV, and repost results.

Really hoping to avoid replacing pistons.

BTW, I noticed that I was getting smoke out of my breather hose too. When I switched the PCV back the way it is supposed to be, it stopped, but I'm still getting smoke out of the tail pipe.

sikefcrx89

iTrader: (1)

rings sound done to me

aasarsak

iTrader: (2)

OK, this is becoming wierd.

Had somebody follow me, and the car only smokes after I decelerate and then punch the gas. No smoke under hard acceleration.

There was oil all inside my PCV when I replaced it.

Car is throwing a cloud of smoke once again at startup.

Vacuum test shows vacuum reading fluctuating vibration between 20 - 18 mmHg (occationallly, not constant)

And it smokes if I blip the throttle at idle.

Here is a shot of one of my valve guides.

If I remember correctly, I believe that 3 intake and 1 or 2 exhaust guides had this kind of scratch/gouge in them.

97hb

You check the turbo??

aasarsak

iTrader: (2)

Yeah. No evidence of oil/tar/gunk/residue whatsoever either on exhaust or compressor side.