redline_racing

Hello Everyone,I have a question for you guys I have a 1987 z28 5.7 that smokes out of the exhaust with blue smoke alot and stinks alot as well.what could it be and am I able to fix it,And if so what do I need to stop smokey from smoking....

SpitotRs305

well when does it smoke all the time only at start up? or just worse at start up sorta depends on how it smokes what you need to do

redline_racing

it smokes bad on start up and throughout the course of the day while I"m driving it it doesn't get no better its not like when I'm at a traffic light i smoke up the the place to the point where my car disappear but she smokes on a 1 to 10,A 8?

ResurrectingZ

Burning oil in the combustion chambers will cause a lot of blue smoke. Possibly bad valve seals, also check pcv valve if it is sticking. Somewhere it is picking up oil and combusting it giving your smokey problems. Also might help to pull the plugs and look for excessive oil buildup to help identify if it is limited to one cyclinder or affects all 8.

Viprklr

iTrader: (5)

Typically valve seals only smoke on startup.
I'd be leaning more towards bad rings. Do a compression test. A leakdown test will also give you a lot of good info.

sofakingdom

iTrader: (1)

An excessively rich condition will make a car do that.

What's your gas mileage? You say the exhaust "stinks"; does it smell rich (too much fuel)? What do the spark plugs look like?

I wouldn't just jump instantly to concluding that it needs rings.

2 things can VERY EASILY make it run super rich. The coolant temp sensor, and the O2 sensor. Although, if the computer sees one of those not responding the way it expects them to, it will light the Check Engine light. But as cheeep and easy to replace as they are (much cheeeeper and easier than rings), that would be a great place to start.

redline_racing

thanks my gas mileage suck in 3 days I poured $120 dollars worth of gas ,exhaust stinks badly,i know she has a exhaust leak but i know that was all but if its the rings how much roughly will it cost to fix or am i able to fix it myself to stop smokey someone please help

sofakingdom

iTrader: (1)

Forget the rings.

Fussing over how much they'll cost won't make the car stop smoking.

Work on the problem instead.

An exhaust leak won't cause smoke.

Start by fixing the rich issue. I just gave you 2 good things to look at, or even just change out, probably $30 for the 2. Far more productive than wasting mental effort on the cost of a total engine rebuild (another name for "replacing the rings").

Sonix

iTrader: (1)

Does your check engine light work? Is it flashing ? (duh?)

I'm pretty sure you can test those sensors as mentioned, but if you can find them that cheaply than i'd do that first without even thinking about it.
After that, i'd look closely at the smoke, blue or black? Check the plugs as
well.
Blue - oil, usually
black - fuel rich, again, usually.

redline_racing

please i have no idea of where to begin i totally confused ,the spark plugs is greasy around the top and and like a little oil puddle around the hole?

VenomX-87

Pull the spark plugs out of the engine (unscrew them), then look at the end that was inside the engine.
Are they black & dry or oily?

redline_racing

ok i pulled them i'm seeing oil around them and its a constant blue&White smoke can I fix this problem or junk the engine and get a newer one?

VenomX-87

umm... pull youre dipstick and see what colour youre oil is.

White smoke is from water, Blue smoke is from oil, Black smoke is from exesive fuel...

online170

this guy is hopeless,

1) Shut the car off,
2) Let it cool (2 hours)
3) Find the spark plug wires, usually the big yellow/blue/ or red ones
4) They go to a round thing on top of the engine on one end (the distributor)
5) And to the spark plug on the other.
6) pull the wire OFF OF THE SPARK PLUG, it should just pop off
7) Get a ratchet, and a 5/8 spark plug socket. (dont have one? go buy it)
8) Un screw, counter clockwise (lefty loosy, righty tighty)
9) It should just untighten in one shot, and should unscrew the rest of the way by hand.
10) If there is wet stuff on the spark plug, it is one of two things;
11) If its fairly clear, not very slippery, and smells like gas, its gasoline. If youre not sure, leave the sparkplug out for about 5 minutes. Check it again, if it NOW looks DRY, its gas, that evaporated.
12) If it does not dry, and is still wet and slippery, its oil.



TAKE SOME PICTURES, of the smoke, of the plugs, of your engine bay, and post them here.

VenomX-87

Take pictures of everything and post them, it will help us help you.

kalel21

I have some what of a similar problem. Just recently she wont start right away and when it does lots of blue smoke comes out the tailpipes. I also noticed that in the mornings it leaves dark circles on the floor. The only thing I have change on the engine is the injectors and that was about 3 years ago. Guess I'm not to suprised that she's giving me problems since she already has 220k miles on her. Maybe it's time for a rebuild. But for now I'll try changing the coolant temp sensor and O2 sensor just like sofakingdom suggested. Last time I changed the spark plugs I did noticed that some of the spark plugs were black. I'll post if changing the sensors helped any.