Oil in the exhaust

[s10blazerman4x4]

When i start my rig up its a 91 s10 blazer 4.3 engine the exhaust is dark black and it shoots an oily residue onto the pavement. you can scrape it up with your thumb. It also has an excessive amount of smoke. It can be warmed up to normal temp of 210 and it still smokes like this when idling. I replaced the tailpipe a month ago it was broke off but the problem persists. I am going to replace pvc valve and o2 sensor but i dont have any ideas. Is it possible the head gasket might be going is gone? Let me know if you have any ideas. Thanks

[Rbraczyk]

Wow, uh, no idea dude, that sucks.

[champion69]

s10BLAZERMAN:
probably isn´t oil at your tail pipe, could be and mixture carbon, water (cat residual) and gas not burned, i found a severous leak inside the injector camber (plenum) in my 4.3L W CPI, the hose line it was ripped, and i found an hole that connect this camber to a middle pistons ( 3 and 4), you can check this sparks plugs, then check for leaks above. Good luck

[s10blazerman4x4]

im gonna replace the pcv valve and my o2 sensors first before i do that hoping maybe that will work but i dont have no check lights

[BlazerLT]

You are running extremely rich by the sounds of it.

Is the smoke black or blue?

[ChevyPower]

I have an 88 blazer with a 350 .I have the same problem but not even close to being that bad and it only does it sometimes. .It only really does it when I start it up

[s10blazerman4x4]

white and billowy but black first and thats on the pavement i could post a pic of it smoke and pavement markings

[BlazerLT]

Originally Posted by s10blazerman4x4

white and billowy but black first and thats on the pavement i could post a pic of it smoke and pavement markings

Ok, some white smoke at the start is normal which is the water in the system evaporating.

BUT, does this white and billowy smoke continue all the time? Even when it is completely warmed up and you drive it?

[s10blazerman4x4]

for about 5 minutes after ward to it is put in drive

[BlazerLT]

Originally Posted by s10blazerman4x4

for about 5 minutes after ward to it is put in drive

Can you repeat that in English for me bro?

[Minkles]

Originally Posted by s10blazerman4x4

When i start my rig up its a 91 s10 blazer 4.3 engine the exhaust is dark black and it shoots an oily residue onto the pavement. you can scrape it up with your thumb. It also has an excessive amount of smoke. It can be warmed up to normal temp of 210 and it still smokes like this when idling. I replaced the tailpipe a month ago it was broke off but the problem persists. I am going to replace pvc valve and o2 sensor but i dont have any ideas. Is it possible the head gasket might be going is gone? Let me know if you have any ideas. Thanks

Unfortunately you need and engine overhaul, black smoke is normally when engine is too rich, blue smoke is oil which means your engine is burning oil due to worn rings, and white smoke, a lot of it is when your head gasket is gone. If you have blue smoke try 20-50 oil as well as a Motor Medic or Motor Honey, that might help the smoking but would only be temporarily .

[BlazerLT]

Originally Posted by Minkles

Unfortunately you need and engine overhaul, black smoke is normally when engine is too rich, blue smoke is oil which means your engine is burning oil due to worn rings, and white smoke, a lot of it is when your head gasket is gone. If you have blue smoke try 20-50 oil as well as a Motor Medic or Motor Honey, that might help the smoking but would only be temporarily .

Ummmmm. No, his timing could be severely retarded or a tuneup is required.

Definitely too much fuel.

[s10blazerman4x4]

where did this come from about the tuneup and what not?I had have plugs and a fuel filter pcv valve put on it.I run quiet smooth no idle problems no stalling problems runs really great just an oil leak

[BlazerLT]

Originally Posted by s10blazerman4x4

where did this come from about the tuneup and what not?I had have plugs and a fuel filter pcv valve put on it.I run quiet smooth no idle problems no stalling problems runs really great just an oil leak

I'm sorry but puking out black smoke from the tailpipe is not "running great".

[s10blazerman4x4]

im kinda confused because i have this threads link in the other thread