this cant be normal...
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From: MD
Car: 88 Iroc-z
Engine: ls1
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this cant be normal...
So I was driving home from school today in my 88 camaro with a ls1/t56. And after I go into my neiborhood I "gun it" and after I let off there was a good sized cloud of white smoke behind me. Wasn't thick however it was very noticable. I installed a zex nitrous kit (75 shot) the other and sprayed twice only on a third gear pull though. Im not sure my plugs are designed for nos use and I doubt they are. I checked the oil when I got home and it seems fine, goldish color. Never had any problems with this engine so far. Any ideas feel free to chime in.
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Re: this cant be normal...
I once had a car with the same problem. White smoke behind me all the time. Turns out my problem was insufficient traction.
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Car: OVRMYHD
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From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
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Re: this cant be normal...
White smoke is not good, do a sniff test on the Antifreeze to check it for carbon in the coolant, just to be safe...
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...

Anyways im going to guess it was nothing and if they problem pops back up then its time to look into a 6.0
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From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: this cant be normal...
a clutch will smoke white, i've also seen a rearend smoke white after it went out(doubt this is the case, you would know, as your car would smell terrible). keep an eye on it. how's your tune?....like qwktrip said, when i stab my throttle like that, its generally my tires coating the pavement.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
a clutch will smoke white, i've also seen a rearend smoke white after it went out(doubt this is the case, you would know, as your car would smell terrible). keep an eye on it. how's your tune?....like qwktrip said, when i stab my throttle like that, its generally my tires coating the pavement.
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From: MD
Car: 88 Iroc-z
Engine: ls1
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Axle/Gears: 3.42
Re: this cant be normal...
Ookay so it happened again today and I actually paid attention to it. Smoke was white for sure no hint of blue I saw. It also happened after wot and when the rpms are coming back down. I went home and check the oil which looks fine, still goldenish from the last oil change and the antifreeze was a little dirty in the bottle so I think I may need to change that soon. It also happened with the cutout open. would this be normal for a car a little higher mileage with no cats? I feel like it would be. If someone could chime in on this it would be greatfully appreciated
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From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: this cant be normal...
generally you will get more of a bluish smoke from rings that are letting oil by.....but that could be the cause of your smoke.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
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From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: this cant be normal...
doesn't have anything to do with your exhaust...just a worn engine, happens over time. there are some other factors that can speed up the process, but with it being a higher mileage engine, chances are they are just worn.
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From: MD
Car: 88 Iroc-z
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Re: this cant be normal...
I see. So any idea on how much longer it'll last? Im guessing a rebuild would be needed in the near future
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From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: this cant be normal...
nope, that's up to you. if its not smoking all the time, not a huge problem. but, its not going to get better.
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From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: this cant be normal...
Again do a carbon sniff test on the antiufreeze, could be a head gasket seeping, one thing is for sure, it will only get worse...
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From: MD
Car: 88 Iroc-z
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Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
It smokes at idle I notice kinda like when its cold outside and its the exhaust. However it does it still when it warms up to when its cold. Bad sign im guessing? Its strange as I don't recall this happening since I've installed the zex wet kit. Guessing that's what sped this process up?
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From: MD
Car: 88 Iroc-z
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Re: this cant be normal...
I actually did smell the antifreeze earlier.. it smelled normal to me. Maybe I didn't get a good enough wiff. I smelled it at the overflow tank if it makes a difference
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From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Okay so today I got the oil changed and it was very.. watery. However no indication of antifreeze in the oil. Antifreeze also looks fine. I looked around ls1tech a bit today and found that the valve seals can wear out and cause this? Any truth to it?
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
finally had some time today and was kinda curious on the plugs since i never changed them before i sprayed.(i know) they are some a/c delco plugs i put in when we swapped in the engine. i only did the drivers side #1 and #5. i was going to do the otherside but its pretty crowded with the wiring and what not.
#1

#5 looks worse as the tip has already worn away. ill order some new colder plugs soon

also out of curiousity, what is this plug? it looks like it should clip on but theres nothing to clip it to? if it makes sense. its barely pushed on there.
#1

#5 looks worse as the tip has already worn away. ill order some new colder plugs soon

also out of curiousity, what is this plug? it looks like it should clip on but theres nothing to clip it to? if it makes sense. its barely pushed on there.
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From: Apopka, Florida
Car: 1989 Pontiac Trans Am GTA
Engine: cammed LS1
Transmission: Monster SS 4L65E
Axle/Gears: 9 bolt posi w/ 3.70 gears
Re: this cant be normal...
Sounds to me like it's valve seals or head gaskets since it's blowing white smoke and not blue. And wow, that's a serious gap on those plugs. If it were me, I'd remove the nitrous and get the car over to a trustworthy mechanic to have them figure out what exactly the problem is. You're definitely going to need a new set of plugs though. Good luck.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Sounds to me like it's valve seals or head gaskets since it's blowing white smoke and not blue. And wow, that's a serious gap on those plugs. If it were me, I'd remove the nitrous and get the car over to a trustworthy mechanic to have them figure out what exactly the problem is. You're definitely going to need a new set of plugs though. Good luck.
edit: i did it and i *think* i did it wrong. i got a funnel and put it where the radiator cap goes snugged it up best i could. started it and let it run and put water in the funnel. the water got taken in and i kept putting water in and it kept being "soaked" in. i didnt see any bubbles while it was going down but as i said im not sure if i did it right.
Last edited by 88blackiroc; Feb 5, 2012 at 05:24 PM.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Bro if thats warm you have a blown head gasket... worn valve guides wont make white smoke... DO THE RADIATOR TEST AS PREVIOUSLY MENTIONED. The new noise is most likely from the water in the oil, if you didnt change it its probably eating up your bearings.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
I did the radiator test. Check the edit in post #24 on this page, I just need to know if I did it right. And that's warm not hot. Hot its normal temp. Which is a hair under 210? Whichever number is in the middle temp. gauge for the fourth gen dash.
also its not a copper residue, its weird I just noticed how that looked to in that pics. Ill have to check it out tomorrow
also its not a copper residue, its weird I just noticed how that looked to in that pics. Ill have to check it out tomorrow
Re: this cant be normal...
http://youtu.be/CCPMW84_zAc N.O.S raises compression on cylinders dont continue to use it on this motor. What was the liquid in the oil?
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Not sure what you mean by what liquid was in the oil? None as far I was concerned. It was time to change the oil and I did. I even asked my dad if he sae antifreeze in the oil and he said there was none as there would be white stuff milked in. Kinda like choco milk. It was real black and watery which means it was overdue for a change. Oil is castrol gts.
That is a really neat test...
where did he do that at? And what kinda of kit is it?
That is a really neat test...
where did he do that at? And what kinda of kit is it?
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Been looking into this problem a bit more.
I read up on ls1tech that a blown head gasket will use a very noticable amount of antifreeze and have a misty exhaust which I do, but I haven't used any antifreeze.
have been noticing the smoke more and more though.
im going to do a leakdown test this weekend and check it out. Also read up the pvc system causes problems with oil getting into the intake which ill check out when I do the leakdown. In the meantime I changed the plugs on the drivers side and found this interesting...

(Sorry if its huge, haven't resized yet) but plus 1,3,7 all look new and 5 doesn't even have the tip?
Couldn't get to the passenger side plugs yet as I have my heating lines in the way. Will redo themthis weekend and change the plugs at the same time
I read up on ls1tech that a blown head gasket will use a very noticable amount of antifreeze and have a misty exhaust which I do, but I haven't used any antifreeze.
have been noticing the smoke more and more though.
im going to do a leakdown test this weekend and check it out. Also read up the pvc system causes problems with oil getting into the intake which ill check out when I do the leakdown. In the meantime I changed the plugs on the drivers side and found this interesting...

(Sorry if its huge, haven't resized yet) but plus 1,3,7 all look new and 5 doesn't even have the tip?
Couldn't get to the passenger side plugs yet as I have my heating lines in the way. Will redo themthis weekend and change the plugs at the same time
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From: Ohio
Car: 88' Iroc-Z
Engine: LQ9
Transmission: T-56
Axle/Gears: 3.42
Re: this cant be normal...
as someone else said, have you checked the gap on the plugs? that looks like an hellacious gap. how is the idle of the car?
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Idles normal. Tomorrow im changing the other side plugs and redoing the heating lines I have their since their what's in my way. Also the leakdown test is tomorrow. So ill post up #s for that.
certainly been smoking more and im also pretty sure it has a blueish tint to. So oil is getting in some where.
1.as mentioned the rings could be going.
2. Valve seals could be worn.
3. Possibly the pvc or emissions is leaking oil through the top of the intake hose.
For 3, I did take the hose off and used a earswab and it was coated in black crap.
Leakdown test is tomorrow and im going to pay attention to cylinder 5 as it looks corroded while all the others look fine(the ones I've checked at least)
certainly been smoking more and im also pretty sure it has a blueish tint to. So oil is getting in some where.
1.as mentioned the rings could be going.
2. Valve seals could be worn.
3. Possibly the pvc or emissions is leaking oil through the top of the intake hose.
For 3, I did take the hose off and used a earswab and it was coated in black crap.
Leakdown test is tomorrow and im going to pay attention to cylinder 5 as it looks corroded while all the others look fine(the ones I've checked at least)
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From: Montana
Car: 89 Camaro
Engine: 2.8L v6
Transmission: 700r
Axle/Gears: Unkown
Re: this cant be normal...
Yeah man this just sounds like the poor girl is two shots of nitrous closer to the grave, nos is hard on everything if the build wasn't set up for it, my bet is that the poor stock motor running 2 75 shots took 25k miles of hard driving off the motor, ide look for a swap personally but maybe a rebuild would be better for you. good luck.
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...
Yeah man this just sounds like the poor girl is two shots of nitrous closer to the grave, nos is hard on everything if the build wasn't set up for it, my bet is that the poor stock motor running 2 75 shots took 25k miles of hard driving off the motor, ide look for a swap personally but maybe a rebuild would be better for you. good luck.
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From: Woodbridge, New Jersey
Car: 1991 Camaro Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73
Re: this cant be normal...
this is probably pointless lol, but how are your injectors cuz i was throwing lots of smoke about a year ago too, i changed all 8 injectors and it hasnt done it since.. never know.
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From: MD
Car: 88 Iroc-z
Engine: ls1
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Axle/Gears: 3.42
Re: this cant be normal...
Doubt its the injectors. Only happens during spirited driving. And it seems to happen more when I wont hot rod around and then gun it. After that it doesn't seem to do it for a bit.
I did a leak down on 1,3,5,7.
dry:155, 160, 155, 160
wet:185, 185, 220? Redid it and it came to 185 when I did it instead of brother, 185
seems extremely consistant at least on the drivers side.
passenger side will be tomorrow as Im still waiting on some hose to redo my heating lines which are in the way. Doubled check oil today and I haven't really lost any in 500-600 miles. And coolant level hasn't moved. So if the passenger side is fine then im stumped
I did a leak down on 1,3,5,7.
dry:155, 160, 155, 160
wet:185, 185, 220? Redid it and it came to 185 when I did it instead of brother, 185
seems extremely consistant at least on the drivers side.
passenger side will be tomorrow as Im still waiting on some hose to redo my heating lines which are in the way. Doubled check oil today and I haven't really lost any in 500-600 miles. And coolant level hasn't moved. So if the passenger side is fine then im stumped
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: this cant be normal...

Passenger side plugs from 8 to 2. The gaps were .60 when I checked them
Finished the leakdown to. Came out to (from 2 to 8)
dry-wet
160 170
150 185
175 190
160 200
I didn't get to double check these either liike the other side. And we put oil in using a hose instead of the can. #2 we put oil in the actual leakdown hose which is why its low for the wet.
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