antsls1

iTrader: (3)

i have been noticing smoke from my tail pipes. i wasnt too worried about it cuz my o2s r bad and i have no cats with straight pipes and headers. i was told its gonna smoke. but somebody was checking out my car and they were like do u go thru oil between changes (mobil 1 5w-30). i said yeah like a quart, how can u tell? he went up to my tailpipes and swiped his finger inside and it had some oil on it. should i be worried about this. the motor is a 2002 gm crate motor with about 12k on it. anybody know whats going on and should i be concerned?

HotSilverBird

Naaa thats normal for a LS1.....

antsls1

iTrader: (3)

I've just never heard of oil build up in the tail pipes before just worried about it has any body had this problem

LS6427

iTrader: (2)

Is it "raw wet" oil.........thats not good. I've never seen any LS1 car with raw wet oil in the tailpipes.............but alot of them do burn 1 qrt every 3,000 miles, thats normal. My LS1 when it was bone stock burned very little oil between changes, maybe a half qrt.

Maybe you have some blown valve seals.

Are you leaving a trail of white-ish/blue smoke when you go WOT from a steady cruising speed, then it slowly clears up as you continue accelerating? Thats a tell-tail sign of bad valve seals. Its what I had going on....smoke trail and burning alot of oil. On morning, cold start-up the **** would shoot out onto the ground as wet raw oil. All I did was remove the heads, had them rebuilt and then I had zero smoke trail when I went WOT and the oil burning was stopped.

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kevinek

You sure it was oil, And not that black **** that blows out when running rich from the bad 02 sensors? Ive seen cars run so rich it would leave black puddles in the driveway behind the tailpipes. I guess its a mixture of carbon and fuel and other good ****.

LS6427

iTrader: (2)

Yup...also when you start in the morning all the water moisture from sitting overnight blasts through the exhaust system and activates that black soot...........I have permanent black splash marks on my driveway from my tailpipes.........

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myk

iTrader: (4)

Yup, my '69 does that; I highly doubt it's oil...

antsls1

iTrader: (3)

Not a lot of oil in tail pipes but can tell its presence. Checked oil but looks good not even a quarter of a quart low. And have gone about 2k miles on last change. I just need to know if I should be concerned.

LS6427

iTrader: (2)

Your PCV valve could be stuck open. They're like $2.00, try a new one.

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~BuMps AloT~

iTrader: (5)

Maybe just excessive blow by. I would try utilizing a catch can on your pcv system. Could be why your o2s are shot.

1994Z28Lt1

iTrader: (1)

my god, the OP said he didn't have an oil consumption problem, therefore, how could it possibly be oil in his tailpipes?? It's NOT OIL!

Its a combination of soot, fuel, and water which is produced by combustion

antsls1

iTrader: (3)

I do have an oil consumption problem. Please reread the post. Almost a quart per change

Slvr00Bird

iTrader: (2)

That's not an LS1 oil consumption problem.. it's the standard..

wssix99

iTrader: (5)

I wouldn't touch that stuff if I were you. You may have a mechaphile loose in your neighborhood: http://www.londonfetishscene.com/wip..._love_to_a_car

slt200mph

iTrader: (42)

You do not have a oil consumption problem. If you used a quart every 1,000 miles GM will tell you that you are within specs. I do not think that is oil in your tail pipes. Sounds like it runing rich and it is carbon build up. My guess is that you need to replace those bad O2 sensors and your problem shoud go away. You can buy some cheepie ones like bosh or NGK but you will be much better off if you use the GM parts. I have seen a few guys that have had to go and buy the GM O2s after they tried the cheepie sensors and they just did not work like the OEM parts. The GM sensors should last you 90,000-100,000 miles.

fbody junkie

im having a similar problem on my car.. im actually in butting in right now cus i need help as well.. like him i also have true duals no cats. cam/heads/ boltons and my car smokes a lot whn i turn it on.. like a crap load.. and i replaced the pcv valve already

Wicked_muscle

iTrader: (34)

If you throw a puff of smoke at wot shifts, then it is probably your valve seals. I would throw a oil catch can since these motors seem to suck a lot of oil through the pcv system.

fbody junkie

yeah i looking in to some prices on these things.. and well its weird cus like at first it was only smoking on one side when i had the drivers valve cover hose off the pcv and wit the hose connected it smokes from both sides

antsls1

iTrader: (3)

I have heard of people putting in the catch cans but where do I get them and where does it install. I really have no clue.

fbody junkie

i was actually looking for some today and i never found anything san antonio sucks for ls1 cars