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04-07-2010, 12:16 AM
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#1 | | Oh goodie, 5 posts already!
Join Date: Apr 2010 Location: Vancouver
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| d16z6 blowing tons of smoke
Hi guys
Im new to the forums
My 1993 Civic si has started blowing blue smoke 24/7....low and high rpms, filling up the whole street with smoke 
Before it only smoked in the higher rpms on the vtech.
I am pretty sure that it is the piston rings... Could you guys help me out? has anyone experience something like this?? I don't want to strip the motor down and then find out that its something completely different  any help would be much appreciated!
thanks
Mitch
Ill get a video of the smoke tomorrow (motor has around 200,000k's on it I think)
Last edited by mpenno; 04-08-2010 at 12:50 AM.
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04-07-2010, 12:38 AM
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#2 | | Captain Happy Bubble is my Homeboy
Join Date: Jul 2002 Location: 604
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What color is the smoke? If it's like steam (white billowing clouds of smoke) then it's probably coolant (headgasket is gone). If it's blue-ish smoke, then it's oil (worst case, piston rings but it could also be something like a clogged pcv valve).
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04-07-2010, 03:08 AM
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#3 | | RS.net, helping ugly ppl have sex since 2001
Join Date: Jan 2005 Location: Vancouver
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You mean D16z6 
If it does come down to piston rings or head gasket, just pop in another d16z6 since the motors are like cheap!
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04-08-2010, 12:52 AM
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#4 | | Oh goodie, 5 posts already!
Join Date: Apr 2010 Location: Vancouver
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....whoooops  yeah d16z6
the smoke is blue, a solid cloud of blue....
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04-08-2010, 06:43 AM
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#5 | | 2x Variable Nockenwellen Steuerung
Join Date: Oct 2002 Location: N49.2 W122.1
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Take it to a Revscene sponsor to get it diagnosed. Get them to do a leak down test. Don't drive it if you can help it, since oil will kill your cat and O2 sensor.
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04-13-2010, 05:41 PM
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#6 | | Oh goodie, 5 posts already!
Join Date: Apr 2010 Location: Vancouver
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ok I took out all the spark plugs and they are all equally black so im starting to doubt that its the piston rings.... what are the chances of all the piston rings going at the same time? im starting to think that its something like the pcv valve. any thoughts?
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04-13-2010, 06:19 PM
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#7 | | Oh goodie, 5 posts already!
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i just went out to check the pcv valve... but there is none. lol. i have a cold air intake ( I didnt install) and there is just a rubber hose going from the valve cover to the intake... and there's also a lot of bypassing going on with a bunch of hoses ill take a picture later to see if you guys can help
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04-13-2010, 08:43 PM
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#8 | | 14 dolla balla & Bradford Chow aint got nothing on me!
Join Date: Oct 2006 Location: Vancouver
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just pop in a new one, those thingies are cheap
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04-13-2010, 09:37 PM
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#9 | | Oh goodie, 5 posts already!
Join Date: Apr 2010 Location: Vancouver
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where exactly is the pcv valve...im getting confused looking at different diagrams
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04-13-2010, 09:43 PM
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#10 | | My dinner reheated before my turbo spooled
Join Date: Nov 2003 Location: Vancouver
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The PCV on a D16Z6 is on the intake manifold. Right under the fuel rail.
And yeah you do have one, the hose you're talking about is the breather tube.
If you're burning oil at all rpm ranges then your piston rings are going, most likely.
I have a z6 for sale btw  | |
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04-13-2010, 10:22 PM
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#11 | | Oh goodie, 5 posts already!
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yeah i found the pcv valve, but it broke when i tried to pull it out... is there a trick to removing it?
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04-13-2010, 11:19 PM
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#12 | | My dinner reheated before my turbo spooled
Join Date: Nov 2003 Location: Vancouver
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Well if it broke you'd need a new one its like less then 5 bucks.
Usually the plastic just becomes brittle from the heat/old age.
Normally I just wiggle them out gently with some pliers.
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