Blue Smoke

[FULLPWR]

back in 2007 it didnt pass inspection, in garage waiting for clutch repair, just got back on ground sat. from clutch install.
2006 put in new rc injectors, along with everything under the plenum.
smoke some even after.
2007 t/o bearing went out, cranked it up every week.
2008 huricane ike kick my a$$
2009 ike still kicking my a&&
2010 move new reason to work on Z
today drove it to work 50 miles
changed oil
changed rearend oil
balanced tires
repositioned prop shaft 180 to correct vibration, WORKED
headed back home 50 miles stopped by state inspectioncplace
then sitting on the drums it starts smoking blue like crazy out the pass side tailpipe, goes and comes. failed test
guy told me he could change out the cats ???

i left there confused of the smoke, it has smoke a lil way back so i wasnt to worried.
no ses lights
slight hesitation on acceleration
I pulled out and punched it second & third gear barks pulls hard feel boggy
but doesnt stop.
got home no blue smoke

since it been sitting so long should i have changed the plugs?
i guess at least chk em
fuel- ihave always topped it off to prevent rusting, and just filled up sunday w/93 today topped it off againso fresh gas
no backfire, maybe slight i heard once not enough to blow off a hose

any thoughts on what it may be

[todesengel]

Generally speaking on dohc cars, the valve stem seals can go bad, and produce exactly the result that you are experiencing now. I am no lt5 expert, but intermittant smoking like that is usually the result of cracked/dry rotted/worn valve stem seals.

[FULLPWR]

sorry, i have a 90 29,580 approx miles
i searched some threads on smoke, saw where they say the early years dont have the seals, would mine be one? why just one pipe not both if they go thru the resonator?

[FULLPWR]

something I should of mentioned, today when i got to work i noticed the tailshaft seal was leaking, gonna put another in tomorrow, i must of pinch it somehow saturday, dumb question maybe but you think the trans oil that leaked onto the resonator maybe got iin thru those slight holes around the beaded edge?? i know it wouldnt explain the smoke fro the past but ....
i guess im thinking to much or not thinking right.

[Zr1 Destroyer]

Blue smoke is oil from somewhere in your motor entering the combustion chamber. I wouldn't sweat it if the blue smoke has stopped.....maybe she needed to get cleared out after sitting!

[todesengel]

I guess I have a LOT to learn about these things. I am not quite sure how it is possible to have an ohc engine, and no stem seals :dunno:

[FULLPWR]

Originally Posted by todesengel

I guess I have a LOT to learn about these things. I am not quite sure how it is possible to have an ohc engine, and no stem seals :dunno:

maybe i read it wrong, i have no idea, i'm just trying to figure it out and really appreciate any info. on it and this whole forum. i dont post allot cuz i ont know alot !! its definitely me that has a whole lot to learn about the Z, i apologize if it came across as questioning your advice, i in no way meant it to read like that. thank you !!!!!!!!!!!!

where would think points of oil entry into the combustion chamber would be?

Luis

[todesengel]

Originally Posted by FULLPWR

maybe i read it wrong, i have no idea, i'm just trying to figure it out and really appreciate any info. on it and this whole forum. i dont post allot cuz i ont know alot !! its definitely me that has a whole lot to learn about the Z, i apologize if it came across as questioning your advice, i in no way meant it to read like that. thank you !!!!!!!!!!!!

where would think points of oil entry into the combustion chamber would be?

Luis

No apology necessary, you may be correct. I am a complete newbie to this car, and I in no way meant disrespect, or appear to be arrogant.

There are basically a few things that I can think of with ohc engines, but there may be more with an lt5. To be honest I have not had one apart yet, although I am going to buy one soon to start piddling with.

1) Valve stem seals
2) crankcase pressure
3) worn rings
4) cracked head
5) bhg
6) cracked block
7) WOrn valve guides.

[FULLPWR]

Originally Posted by todesengel

No apology necessary, you may be correct. I am a complete newbie to this car, and I in no way meant disrespect, or appear to be arrogant.

There are basically a few things that I can think of with ohc engines, but there may be more with an lt5. To be honest I have not had one apart yet, although I am going to buy one soon to start piddling with.

1) Valve stem seals
2) crankcase pressure
3) worn rings
4) cracked head
5) bhg
6) cracked block
7) WOrn valve guides.

thats great !! your gonna love it, i realydont have muchtime in mine but what i have had ...nothing else can compare!!! at least to me anyway

[FULLPWR]

Originally Posted by Zr1 Destroyer

Blue smoke is oil from somewhere in your motor entering the combustion chamber. I wouldn't sweat it if the blue smoke has stopped.....maybe she needed to get cleared out after sitting!

could it be the pcv valves are pulling it in?
I need to run it again see how much smoke comes out, then open her up again, could the bog be related to something else?