Raw fuel pouring out of t25 after removal

[onefast2gdsm]

Raw fuel is pouring out of my t25. Its coming out of the o2 housing and where the turbo meets the manifold. When I removed it and placed it down I didn't notice anything dripping from tthe manifold or the turbo. That was last night. I go to move the turbo to show my father in law tonight and fuel just poured everywhere. What can cause this and what am I looking to get into. My head is currently off the car, I'm doing a headgasket as well before the 16g goes on.

 

[BoredDSM]

Are you sure it's fuel and not coolant? For fuel to get that far it would mean your motor is not burning the fuel at all and just pouring it into the exhaust system.

 

[onefast2gdsm]

I'm certain its fuel I put my hand in it and smelt it. Also, when I drained my oil I got nothing but an exhaust smell. My headgasket blew out on the front passenger side of the block right on an oil passage, don't know if that's related. But I don't understand how raw fuel would get into the turbo.

 

[onefast2gdsm]

Could it be that my turbo was boosting at 18 psi (spike) and the injectors were locked open all the time? Or a bad seal in the turbo? I need some guidance on this and need to fix the problem asap

 

[BoredDSM]

Was it straight fuel? It isn't unheard of to have unburnt fuel mix with oil when your rings go bad or your headgasket goes. If it is straight raw fuel I wouldn't know what to tell you. A pic would be helpful.

 

[onefast2gdsm]

Its straight raw fuel. The manifold is dry. The flange that connects to the manifold and the one that connects to the o2 housing is where its commingle from. The turbo does have shaft play. When I drained the oil it smelt like straight gas

 

[BigBeans]

This doesn't make any sense. The only way to get fuel into the turbine housing would be the manifold if you had a dead cylinder, in which case it would probably burn the fuel in the manifold or turbo.


I'm baffled as to how it's possible to have a dry manifold and a turbine housing full of straight fuel.


It seems like it would only be possible if it were a gas and oil mix.

 

[onefast2gdsm]

I know it doesnt make sense. The car pulled hard and showed no signs of even having a bad headgasket. Only way I found out was when I was swapping turbos I noticed oil on the block. The exhaust was smoking white before I took the turbo off but no coolant passages were damaged on the headgasket and the coolant level never changed. The oil wasn't mixed with ccoolant and vice versa.

 

[onefast2gdsm]

Also, when I took the fuel lines off of the fuel rail, only the feed line had gas pour out. Not a drop from the return line

 

[LiquidX]

Auto ignition temperature of gasoline is roughly 536*F and also it will vaporize readily below room Temperature. LEL is 1.4% and the UEL is 7.6%. It's the ratio of oxygen to vapor required to combustion. LEL is the lower explosive limit and the UEL is the upper explosive limit. It is also termed as LFL and UFL ( F is flammable). Beyond either end then the mixture is either too lean or too rich to ignite.

I highly, highly doubt it's straight gasoline. Be smart about it but did you try taking a small sample and see how flammable it is within a controlled environment?

 

[onefast2gdsm]

Auto ignition temperature of gasoline is roughly 536*F and also it will vaporize readily below room Temperature. LEL is 1.4% and the UEL is 7.6%. It's the ratio of oxygen to vapor required to combustion. LEL is the lower explosive limit and the UEL is the upper explosive limit. It is also termed as LFL and UFL ( F is flammable). Beyond either end then the mixture is either too lean or too rich to ignite.

I highly, highly doubt it's straight gasoline. Be smart about it but did you try taking a small sample and see how flammable it is within a controlled environment?

No I have not. I will try that though. What scares me is that it wasn't just a little bit coming out, it was a lot. Do you think the oil smelling like gas has anything to do with it or do you think that was because of the headgasket?

 

[LiquidX]

That could just be excessive blow by. As said by others, the only way for straight gasoline to fill the turbo would be a dead cylinder and somehow manage to collect in there quickly before it was torn apart.

All that goes to the turbo is exhaust, oil, and coolant. Aside from the smell, what color is it, does it evaporate quickly?

 

[BigBeans]

Also, when I took the fuel lines off of the fuel rail, only the feed line had gas pour out. Not a drop from the return line

Whichever one you disconnect first will do the draining. That's normal.

 

[onefast2gdsm]

Whichever one you disconnect first will do the draining. That's normal.

I disconnected the return line first as per the service manual

 

[onefast2gdsm]

That could just be excessive blow by. As said by others, the only way for straight gasoline to fill the turbo would be a dead cylinder and somehow manage to collect in there quickly before it was torn apart.

All that goes to the turbo is exhaust, oil, and coolant. Aside from the smell, what color is it, does it evaporate quickly?

I don't think it evaporates quickly, I have to check again. It definitely isn't a ddead cylinder, wouldn't I notice? The car pulled hard and drove good besides the white smoke from exhaust.

 

[JusMX141]

My 1G FWD did something similar prior to taking it off the road for it's teardown- although I had a stuck injector on cylinder #3 which was the problem. It never stopped spraying- and the car ran like absolute shit.

 

[onefast2gdsm]

My 1G FWD did something similar prior to taking it off the road for it's teardown- although I had a stuck injector on cylinder #3 which was the problem. It never stopped spraying- and the car ran like absolute shit.

The car wasn't running like shit though, this is the first time I ever swapped a turbo and ever did a headgasket so I'm learning as I'm going. How do I check if the injectors are stuck open?

 

[JusMX141]

In my case it was simple- as I was tearing the engine down for rebuild, the exhaust port of #3 was soaked with raw fuel.

 

[onefast2gdsm]

In my case it was simple- as I was tearing the engine down for rebuild, the exhaust port of #3 was soaked with raw fuel.

I took the head off with manifolds still attached, ill be ripping off the exhaust manifold and verify the ports. Thanks Justin. Just to clarify confusion when I said the manifold was dry I meant where it connects to the turbo flange. I stuck my hand in it and it was bone dry

 

[JusMX141]

Are you sure it's not oil from the blown turbo? What you're describing doesn't sound like it came from one of the ports.

 

[onefast2gdsm]

Are you sure it's not oil from the blown turbo? What you're describing doesn't sound like it came from one of the ports.

It wasn't the color of oil it was transparent

 

[BigBeans]

I vote oil/gas mix.

If it doesn't evaporate quickly it isn't straight fuel.

 

[onefast2gdsm]

I vote oil/gas mix.

If it doesn't evaporate quickly it isn't straight fuel.

What would cause the both to mix. The headgasket wasn't blown by the combustion chamber

 

[BoredDSM]

What would cause the both to mix. The headgasket wasn't blown by the combustion chamber

Having worn piston rings is one way unburnt fuel and exhaust gases could mix with oil, usually causing it to have a heavy odor of gasoline. Did your dipstick ever pop out?

 

[onefast2gdsm]

Having worn piston rings is one way unburnt fuel and exhaust gases could mix with oil, usually causing it to have a heavy odor of gasoline. Did your dipstick ever pop out?

Nope never had the dipstick pop out. Oil pressure is always good no loss of power.