Black "oil stuff" out of tailpipe

[kblomquist]

87 4runner (bone stock)

Is this oil? Seems to only happen upon start up. Doesn't smoke going down the road or when crawling in 4 low. I have only owned this vehicle for a short time.

Your thoughts?

 

[kblomquist]

shameless bump

Am I the only one that this has happened to?
I am hoping that it is unburnt fuel and can be taken care of w/ a major tune up.

Anybody?

 

[WristPin]

sounds normal to me.
just do a tune up anyway.

unless there is blue black or white smoke you doant have anything to worry about.

 

[2ndGenToyotaFan]

Hmmmm, can you get a sample of this black stuff? Mine does it a little bit sometimes.... (Like when there's snow on the ground so I notice.....)

 

[aedavis]

My 85 4Runner does the same thing - it is oil blowing past the rings. Just because it doesn't smoke doesn't mean it isn't 'burning' oil. It most likely is smoking; you just don't see it because it is only at higher RPMs.

Allan

 

[fourwd1]

My 84 also, oil's getting the rings, or possibly the valve guide seals are bad.

 

[84pickup]

it's prolly just water built up in the muffler and it get a little carbon in it on the way down the pipe. that's all my black stuff is.

 

[dizzidave]

Rub the stuff between your fingers. You'll know if it's oil. Hopefully it's just water with specs like 84pickup says. In my case it was oil.

 

[aedavis]

If you find out that your truck is using oil, consider this:

When I first bought my 85 it was going through a quart every 500 miles during normal driving. I did some experimenting with different oils and, using either Castrol High Mileage 10W40 or Supertech High Mileage 10W40, I only use 1 quart every 1000 miles.

Allan

 

[LeftCoast]

I just got a 3.0 swapped yesterday, and upon firing it up, a whole bunch of that crap came out. I'm hoping it's just blow-by from the previous catastrophic failure, and will clear itself out.

 

[LeftCoast]

Holy crap, you can't say crap????


It's the c-r-@-p word...

 

[84pickup]

Holy crap, you can't say crap????


It's the c-r-@-p word...

 

[dizzidave]

hey leftcoast,
LeftCoast I just got a 3.0 swapped yesterday, and upon firing it up, a whole bunch of that **** came out. I'm hoping it's just blow-by from the previous catastrophic failure, and will clear itself out.
After my engine was rebuilt same thing, scared me and made me want to punch mechanic, however after a month or so it stopped. Must have been just like you say caught up in cat and muffler and finally goes away. I think it'll be just fine. Hopefully

 

[LeftCoast]

Mine seems to have stopped after a day or so. Keeping my fingers crossed...


GL