Ok I need help from some of the gurus...massive blowby...

[TalonESIT]

I will try to explain the situation the best I can.

About 2 weeks ago my car started shooting a lot of white smoke out of the exhaust, this only occurs during boost. When I let my car sit for a while and start it up a white smoke cloud appears again, but goes away as I start driving(staying out of boost). Im boosting about 16lbs, but when I go anywhere above 11lbs the exhaust starts to shoot more smoke and almost refuses to pick up speed (very choppy) and my dipstick pops out a little...

My WB02 is reading about 10.5-11 so I know im not leaning out, just changed my spark plugs to some nice denso iridiums (gapped at .028), installed a new pcv valve, and just changed the oil (I was down to two quarts. I have not lost this much oil before w/o a leak so when I checked the dipstick I figured I was just reading it wrong...)

My turbo is fine and I did a compression test to the engine (the correct way 165-165-170-165). I was worried about it being a piston ring, but if that was the case my compression would have been crappy right? I've always had excessive blowby in this car, but it usually spilled in the engine bay. This time no oil in the engine bay, just white smoke and some oil coming out of the exhaust.

Any mods or wisemen have any idea; I haven't ruled out the valve seals, but im hoping that is not the case because I dont know how difficult that is to change or how to do it (I do have a manual though).

 

[VelocitàPaola]

Are you running any sort of a catchcan? If not, it sounds like it may be something as simple as the PCV valve.

 

[TalonESIT]

Are you running any sort of a catchcan? If not, it sounds like it may be something as simple as the PCV valve.

Yeah im running a catchcan between the pcv hose on the valve cover nipple and the nipple on the intake manifold.

 

[VelocitàPaola]

Is there a PCV valve somewhere inline? If not, you're just pressurizing the crankcase, which is why the dipstick is popping out... and possible why you're smoking (pushing oil up past the rings or valve stem seals).

 

[TalonESIT]

Is there a PCV valve somewhere inline? If not, you're just pressurizing the crankcase, which is why the dipstick is popping out... and possible why you're smoking (pushing oil up past the rings or valve stem seals).

Yeah, I just replaced the PCV valve with a new one.

 

[VelocitàPaola]

Is it installed in the right direction?

 

[TalonESIT]

Is it installed in the right direction?

The white end is not going into the intake mani, that's correct right?

 

[VelocitàPaola]

I'unno...

Take it off and blow into it. Which ever end you can successfully blow into should be connected to the crankcase in some way or another.

 

[TalonESIT]

I'unno...

Take it off and blow into it. Which ever end you can successfully blow into should be connected to the crankcase in some way or another.

Yeah then I connected it correctly, its pushing air into the intake mani and not letting it come back (or at least it's suppossed to do that..)

To give a better idea, I have included a highly detailed drawing of my pcv and catchcan setup:

It's impressive I know, all my years with microsoft paint is finally paying off...

 

[VelocitàPaola]

Hmm... I don't know then. Maybe someone else has an idea?

 

[bullettdsm]

Hmm... I don't know then. Maybe someone else has an idea?

Sorry Paul, I'm not a mod or wiseman or a guru so I can't answer.

MB

 

[4wd-Eclipse]

I hope this will help you
http://www.dsmtuners.com/forums/showthread.php?t=229338

 

[Blitzeclips]

Sorry Paul, I'm not a mod or wiseman or a guru so I can't answer.

MB

Me neither.

 

[TalonESIT]

Sorry Paul, I'm not a mod or wiseman or a guru so I can't answer.

MB

I didn't mean that in literal terms, I meant anyone with mechanical experience...

People, don't be smartasses... the title was to inform the reader that this is a tricky problem with common symptoms of other issues, but they don't seem to be the case...

4wd-Eclipse: thanks I'll read that link

Paul: thanks for the help so far

update: I read that link, but all it is suggesting is that I install an additonal pcv inline with my oem one...it's worth giving a try but you guys think that will solve my problem??

 

[Blitzeclips]

What is with all the hostility today? Geesh...

Anyways, I'd assume theres too much pressure in the crankcase if the dipstick is shooting up on you. Sounds like a bad seal as Paul said. Definately something related to the PCV valve, not the actual system.

Also, the best way to check for ring failure is via leak down test. That will let you know for sure what's going on down there.

If you've lost 2 quarts yet fail to see a visual leak, that means you're probably burning it.

I also see a bownheadgasket possible. If the head is under alot of pressure while coolant can reach the conbustion chamber, then you will definately see some white smoke, and choppy conditions under 12psi+. Then again, your compression seem OK..

Oil out of the exhaust though? That means oil is passing trhough your cylinder sleeves/ rings, up by the combustion chamber. Which is... not good. I would definately get a leak down test done.

If you usually have excessive blowby then maybe you neglected to re-fill the oil when needed. If you are low on oil this may occur, though I cannot say I've seen it happen.

What type of fuel set-up do you have? Did you re-wire the pump?

 

[TalonESIT]

Now its getting bad... I haven't even drove the car since yesterday, but now the smoke is ridiculous... this is after it has been sitting at idle for about 5 minutes....

oh and this was recorded on my treo which is why the car sounds like a tin can....

http://www.youtube.com/watch?v=V6MwfHBONoA

Im using a walbro 255lph and I haven't rewired the fuel system

 

[bullettdsm]

As Blitz alluded to, you can show good comp but still have a busted ring landing. That's why you would do a leak down test. The comp tester just shows how you are building up pressure. But because of the valve in the comp tester it doesn't show the loss. The broken ring landing can stay in a position that allows compression but not hold it.

Even though you show good comp, this can also be a bad HG. Comp is not ALWAYS an indicator of a blown HG.

MB

 

[TalonESIT]

As Blitz alluded to, you can show good comp but still have a busted ring landing. That's why you would do a leak down test. The comp tester just shows how you are building up pressure. But because of the valve in the comp tester it doesn't show the loss. The broken ring landing can stay in a position that allows compression but not hold it.

Even though you show good comp, this can also be a bad HG. Comp is not ALWAYS an indicator of a blown HG.

MB

Man, I'm in denial cause spent a good deal of money on that new clutch...now its this...I've yet to mess with internals because i dont trust myself but its starting to look like I don't have a choice... I can't pay to have this worked on by someone else, I can only imagine how much it will cost for labor especially since I can't pinpoint the problem....

 

[Blitzeclips]

A leak down test is $100 or less around here. Not too expensive. Plus you get an idea of where your internals are as far as damage goes.

 

[TalonESIT]

So this is an old thread but i figured it would be better than starting a new one since it is still here and unresolved. I recently Took my head off because the smoke obviously won't fix itself ( please read above and watch video for update on problem) and I took some pictures to see if anyone has any insight.

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There doesn't look like any damage in the cylinder walls, but there is an excess of oil kegged up on the valves. I have ordered a new head gasket, vavle seals and ARP head studs, do those sound like the items I need? I do plan on dropping the valves and cleaning them off before I replace them just so you know. Thanks for any help!

Oh and before I removed the head I was never able to get around to get a leakdown test... I apologize for not having results from that.

 

[talon187]

yeah sounds good make sure you get the head shaved and i would go with a mitsu 4 layer metal headgasket...worth the money and a must if you plan on making alot of power

 

[KazooGS-T]

A cometic will do just fine. Also it appears that there are some metal shavings in various spots, is that correct?

 

[TalonESIT]

A cometic will do just fine. Also it appears that there are some metal shavings in various spots, is that correct?

no metal shavings, it may be dust and lint from the towel when wiping down the area.