Board Logo

fuel hydrolock on ej20?
kombibob - June 12th, 2006 at 10:01 AM

hi all
this morn i went to start my bus(ej20) and got nothing, it wouldn't even turn over.
i took the spark plugs out and fuel came splashing out under preasure so it seems it had hydro locked??
now it is showing no fault codes?
could this be just injector seals? anyone experianced something similiar?


GeorgeL - June 12th, 2006 at 11:11 AM

Quote:
Originally posted by kombibob
hi all
this morn i went to start my bus(ej20) and got nothing, it wouldn't even turn over.
i took the spark plugs out and fuel came splashing out under preasure so it seems it had hydro locked??
now it is showing no fault codes?
could this be just injector seals? anyone experianced something similiar?


Hmmm, in order to get enough fuel into the cylinder to hydrolock I'd think that the pump would have to be running. Are you sure it is shutting off?

If you've hydrolocked with fuel and tried to turn the engine, check your oil. Some of that fuel might have been forced past the rings and might have contaminated the oil.

George


phatratpat - June 12th, 2006 at 02:07 PM

:thumb DUDE I did the brakes, all good,, I am big he man !
I AM ONE WITH MY KOMBI :lol:


gull - June 12th, 2006 at 02:17 PM

I stripped down a rs ej20T on sunday , the same problem .The motor snaped the rear conrod and spat the oil pick up off .



they did the same thing remove the spark plug let the fuel out and hit the key .motor ran great untill the second start then bang ! dead

injector failed open ? dont think so
fuel pump stayed on ? mmmm not sure

others I have seen the air flow unit fail and fill the bore with fuel ( and put 3ltrs in the sump )

I have two ej20 n/a jap motors here & a ej25

sounds like your in more shit than the fist settlers .


kombibob - June 12th, 2006 at 08:21 PM

fuel pump is shutting off, oil level is fine but i will change before i try and start next.
i removed the injectors today and the seals do look ordinary ,i'll get them cleaned and seals replaced tomorrow and see if that works.


1303Steve - June 12th, 2006 at 08:46 PM

Hi

With the height of the Kombi fuel tank, I wonder if you have leaking injector pintel and the fuel is able to syphon from your tank when the car is standing. If this is a common problem a bandaid fix would be to fit a fuel lock off solenoid, but it would be best to find the cause in the 1st place.

Steve


ian.mezz - June 12th, 2006 at 08:51 PM

to check if injectors are leaking you need to leave them connected tto fuel rail once lifting them out of holes, disconnect wires then prime line , let sit for a while then touch end of injector should be dry?? but from what you said you would see the fuel comming out ???
the seals in manifold only let air get sucked in , if worn.
not fuel.

[ Edited on 12-6-2006 by ian.mezz ]


seagull - June 12th, 2006 at 10:06 PM

Thats what sam did ! then the donk whent BANG ! oil all over the place

start it in the sand & be ready for it


pete wood - June 13th, 2006 at 12:16 AM

smell the oil. if it smells like fuel, drain it and replace it before you start it.

BTW, are you sure it's not the starter motor?


seagull - June 13th, 2006 at 06:48 AM

what are you smoking Peter ?


pete wood - June 13th, 2006 at 09:56 AM

sorry, I was just thinking outside the square. what I thought was a seized motor in my car turned out to be stuffed starter, that's all.

and if the oil has any fuel in it, he needs to change it or he will screw the bearings.


kevo - June 14th, 2006 at 11:16 AM

Quote:
Originally posted by phatratpat
:thumb DUDE I did the brakes, all good,, I am big he man !
I AM ONE WITH MY KOMBI :lol:



what the F**K are you smoking dude?


Baja Wes - June 14th, 2006 at 03:18 PM

Steve and Ian are on the right track. Stuffed mani seals would only let air in.

Sounds like an injector is sticking and not shutting off properly. Leaving overnight the kombi tank probably would be high enough to siphon out through the leaky injector. It would also cause fuel to constantly spray from the injector when the key is switched on (fuel pump on).

My mate parked his baja on a hill on fraser island and it let the fuel siphon from the tank, through the dellorto's, through their overflow pipe and into his engine. We had a nice Fuel hydrolock the next day, and a couple of litres of fuel in the oil. I had to drive off to a civilised part of the island to find oil, and then came back for an oil change in the middle of a sand island, not the best place for it :)


kombibob - June 14th, 2006 at 06:18 PM

wouldn't the top seal on the injector seal aganst air and the lower seal prevent fuel bypassing the injector?
the lower seals on mine were cactus and the fuel injection specialist said that they would have been the cause.
cleaned and resealed injectors are in and it seems to be running fine with no fuel smell when i get up it anymore too.
fingers crossed

[ Edited on 14-6-06 by kombibob ]


h - June 14th, 2006 at 08:19 PM

Quote:
Originally posted by kevo
Quote:
Originally posted by phatratpat
:thumb DUDE I did the brakes, all good,, I am big he man !
I AM ONE WITH MY KOMBI :lol:



what the F**K are you smoking dude?

ditto to that.. :o
good to see ya fixed it bob.. :thumb


Baja Wes - June 14th, 2006 at 08:30 PM

Quote:
Originally posted by kombibob
wouldn't the top seal on the injector seal aganst air and the lower seal prevent fuel bypassing the injector?



you might be right. They are quite different to my injectors.


kombibob - June 14th, 2006 at 09:10 PM

yep all seems good now nice and crisp and much more responsive.
thanks for your thoughts guys.
and don't worry about phatratpat i know what he was on about.
and what he has been smoking ..:P


phatratpat - June 14th, 2006 at 10:42 PM

:lol: ITS GOOD SHIT MAN ! ! !:crazy:


seagull - June 15th, 2006 at 12:43 AM

I am going to get now seals for all 4 of my subaru donks now


GeorgeL - June 15th, 2006 at 04:28 PM

Quote:
Originally posted by gull
I stripped down a rs ej20T on sunday , the same problem .The motor snaped the rear conrod and spat the oil pick up off .



If the engine gets just barely enough fuel in there to hydrolock it can put tremendous stress on the crank and conrod due to the angles of the components (lots of leverage near TDC) It's likely that the engine above had this occur and damaged, but didn't break a conrod. Upon startup, the conrod finally broke.

Now, that is a worst case. If the cylinder was half full of fuel the forces would be far lower and probably wouldn't hurt anything.

George


gull - June 15th, 2006 at 05:39 PM

the flame stripped the paint off the rolla door