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i tink i broked my truck

biggins

Rump Junkie
May 18, 2003
7,173
9
dhtahoe said:
Looks like head gasket time. I-4 or V-6. I will Guess V-6 because they tend to blow the HG.

not trying to attack ya here tahoe but that is everyones assumption when it comes to smoking tailpipes. there are actually at least 6 different things that could be doing that.

head gasket/rings/valves/water in the gas/fuel not combusting completely in the chamber........

does the smoke linger or go away?

is the smoke very white and thick?

does it smell like antifreeze?

why is it dark there right now?
 

-dustin

boring
Jun 10, 2002
7,155
1
austin
biggins said:
not trying to attack ya here tahoe but that is everyones assumption when it comes to smoking tailpipes. there are actually at least 6 different things that could be doing that.

head gasket/rings/valves/water in the gas/fuel not combusting completely in the chamber........

does the smoke linger or go away?

is the smoke very white and thick?

does it smell like antifreeze?

why is it dark there right now?
1) uh....goes away.
2) pretty thick and white.
3) no smell
4) taken last night

HRDTLBRO said:
Stick a potato in the exhaust pipe, this will stop the smoke.
did that. covered in foil, too. makes a good baked potato!

dhtahoe said:
Looks like head gasket time. I-4 or V-6. I will Guess V-6 because they tend to blow the HG.
Vee Six
 

dhtahoe

I LOVE NORBA!!!!
Feb 4, 2002
1,363
0
Flying Low Living Fast
biggins said:
not trying to attack ya here tahoe but that is everyones assumption when it comes to smoking tailpipes. there are actually at least 6 different things that could be doing that.

head gasket/rings/valves/water in the gas/fuel not combusting completely in the chamber........

does the smoke linger or go away?

is the smoke very white and thick?

does it smell like antifreeze?

why is it dark there right now?
Yeah I know but will still Guess the HG... common toyota V-6 issue. Now that I read his last post I will lean that way for sure. They tend to rip the HG between the rear cylinder and one of the oil passages for the head. After it warms up they tend to seal themselves AT FIRST. Wait a few weeks!!! Get it checked out before it warps the head. Check you coolant for a milky color. Check oil for coolent.
 

Ian F

Turbo Monkey
Sep 8, 2001
1,016
0
Philadelphia area
dhtahoe said:
Yeah I know but will still Guess the HG... common toyota V-6 issue. Now that I read his last post I will lean that way for sure. They tend to rip the HG between the rear cylinder and one of the oil passages for the head. After it warms up they tend to seal themselves AT FIRST. Wait a few weeks!!! Get it checked out before it warps the head. Check you coolant for a milky color. Check oil for coolent.
A way to diagnose this without pulling the head is to do (or have a mechanic do) a leak-down test.
 
D

d-sop

Guest
Wumpus said:
Those mythbuster dudes did that and it shot out like a potato gun. :thumb:
:stupid: i built one outta abs; rents dont like it cuz abs, wanna buy pbs or pvc or watever so its stronger.
 

Kornphlake

Turbo Monkey
Oct 8, 2002
2,632
1
Portland, OR
d-sop said:
:stupid: i built one outta abs; rents dont like it cuz abs, wanna buy pbs or pvc or watever so its stronger.

ABS will be more shock resistant than PVC, PBS is a channel on TV, you'll never find PBS pipe, unless that's what you smoke crack in. If you want a potato gun that won't blow up in your face look for metal pipe. If I were making a potato gun I'd make it out of aluminum, but that's just because I can.
 

punkassean

Turbo Monkey
Feb 3, 2002
4,561
0
SC, CA
White smoke is a result of burning oil. So it is most likely either blow-by or some sort of headgasket problem. When you did your last oil change recently did you by chance switch to synthetic? Often when higher mileage engines make the switch from regular to synthetic they develop many small oil leaks. Or did you go a long time on your last oil change (like 10K plus) Other than that did you overheat the truck recently, even only mildly?

First year (95.5) Tacoma's still suffered from the head gasket problem that was so common on the old 3.0L motor but they were covered under a recall and the issue has been resolved reliably for years now. So if you did manage to blow the HG it would most likely be from overheating. When you say the oil looks okay are you sure about that? When antifreeze and oil mix it looks like a chocolate milk shake (think: 5 year old marzocchi fork oil) with lots of sludge and crap.

My guess is it's blow by, high mileage engines suffer from it because the piston rings wear down slightly and let oil escape into the combustion chamber. With a mild case the problem (blowing smoke) will go away once the metal expands (engine warms up) and the tolerance is reduced or eliminated. My old 22RE Toyota burned about a quart per 1000 miles and that was normal for over 100K on the odo.
 

Wumpus

makes avatars better
Dec 25, 2003
8,161
153
Six Shooter Junction
White smoke: White smoke is caused by water and or antifreeze entering the cylinder, and the engine trying to burn it with the fuel. The white smoke is steam. There are special gaskets (head gaskets are the primary gaskets) that keep the antifreeze from entering the cylinder area. The cylinder is where the fuel and air mixture are being compressed and burned. Any amount of antifreeze that enters this area will produce a white steam that will be present at the tailpipe area.

If white smoke is present, check to see if the proper amount of antifreeze is inside the radiator and the overflow bottle. Also check to see if antifreeze has contaminated the engine oil. You can look at the engine oil dipstick, or look at the under side of the engine oil filler cap. If the oil is contaminated with antifreeze, it will have the appearance of a chocolate milkshake. Do not start the engine if the oil is contaminated with antifreeze, as serious internal engine damage can result.

How did antifreeze get in the oil or cylinder in the first place? The engine probably overheated and a head gasket failed due to excessive heat, thus allowing antifreeze to enter the cylinder (Where it is not meant to be).

Blue Smoke: Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with the white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles.

How did the engine oil get inside the cylinder in the first place? The car has many seals, gaskets, and O-rings that are designed to keep the engine oil from entering the cylinder, and one of them has failed. If too much oil leaks into the cylinder and fouls the spark plug, it will cause a misfire (engine miss) in that cylinder, and the spark plug will have to be replaced or cleaned of the oil. Using thicker weight engine oil or an oil additive designed to reduce oil leaks might help reduce the amount of oil leaking into the cylinder.

Black Smoke: Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

http://www.trustmymechanic.com/troubleshoot_smoke.htm
 

punkassean

Turbo Monkey
Feb 3, 2002
4,561
0
SC, CA
no that deck plate has nothing to do with it.

Does it smell smokey or does it seem steamy like wumpus described. Even though the description says "blue" smoke, burning oil mostly looks whitish with a barely noticeable blue hue.
 

Changleen

Paranoid Member
Jan 9, 2004
14,721
2,706
Pōneke
Kornphlake said:
ABS will be more shock resistant than PVC, PBS is a channel on TV, you'll never find PBS pipe, unless that's what you smoke crack in.
Polybutadine Styrene. You can get tube made of it.