Outer Limits 4x4 Board

My 75series with a 2H engine was just fitted with a new fuel and oil filter. After blowing ceals off my oil filter i worked out that the oil pressure relief valve needed replacing with the aftermarket extended part. I have since done this and have driven 200km with the oil pressure being spot on. However yesterday afternoon after 5-10min of running i noticed that the idol was rough. Cabin was julting from side to side when stoped. I incresed the idol revs and this vibration went away however thats when i noticed that there is now white smoke coming out of exhaust. From what i can tell i am not burning oil. I have lost about 800Ml of water in the last 200km as well.

I understand that white smoke is either water (bad bad bad) or unburnt diesel usualy linked to bad injectors/carbon deposits. Is this correct.

If so has anyone had expearence running a cleaning agent in the fuel with the 2H and what was the outcome and what one did you use.

Do you think i should replace hoses including heater hoses?

Thank you,

Jono

I would be investigating your water lose situation asap combined with white smoke it could well be leaking internally which would cause rough idle. Water lose and white smoke not a great combination. Do you have bubbles in your radiator at say 1000rpm?

Think a compression check would be a good start.
Oil isn't a milky colour is it?
As Scanas suggested, run the engine without the radiator cap and look for air bubbles.
I wouldn't worry about changing hoses or trying a fuel flush, definately get the white smoke issue sorted.

Thank you for the quick replys. I just took the car to the local macanic to see about a compression test who was as usefull as tits on a bull.

On the way home i thaught i would do some laps around the block to see if the temp was going to go up like you would expect from a blown head gasket.

The smoke stopped bellowing and the idol became smooth again like nothing was ever wrong. My theorys are.
1-that there is a buggered injector which would cause a cylinder not to fire then eventualy it would come around. This would explain rough idol(feeling of timing being out).
2-there was water in my fuel from condensation in tank.

cheers,

jono

or you have coolant leaking into the cylinder when its not under pressure.

pressure test the system when its cold

I had an issue similar to this with one of my old 2H's, turned out to be a buggered diaphragm in the back of the fuel pump.

Symptoms were, rough running of engine, very bad white smoke issues (obviously overfuelling)...

Cost me $70 all up, a diesel fitter friend of mine fixed it at the time.

White smoke from a diesel can also be a symptom of air getting in the fuel system, you obviously got lucky and it "bled itself" out on the drive home.

i would say you didn't bleed the fuel system properly after replacing the fuel filter. if the symptoms come back, check for any loose connections in the fuel filter then bleed the fuel system (one time i left a washer off the injector lines, and got myself an intermittent problem like that).

BLACK smoke is a symptom of too much diesel. and if it's water getting into the engine, it would smell sweet, like burning coolant... you do run coolant don't you?

BLACK smoke is diesel that has combusted.

WHITE smoke like I had was uncombusted diesel, due to massive overfuelling.

Cheers

Guarantee you that you have done a headgasket, and i bet it only uses water when your above 80 or 90ks........ cheap fix mate and i speak from experience as a diesel fitter and have done a number of 2H's (usually turbo ones but your oil pressure relief failing would of caused it) when you tourque your headbolts back up go another 10 over what is reccomended with the tension wrench.(thats how i fix the turbo one's from blowing them) and it don't hurt them a bit. They really lack the number of headbolts on a 2h compared to the 1hz's and the likes of others.

bad_religion_au wrote:White smoke from a diesel can also be a symptom of air getting in the fuel system, you obviously got lucky and it "bled itself" out on the drive home.

i would say you didn't bleed the fuel system properly after replacing the fuel filter. if the symptoms come back, check for any loose connections in the fuel filter then bleed the fuel system (one time i left a washer off the injector lines, and got myself an intermittent problem like that).

BLACK smoke is a symptom of too much diesel. and if it's water getting into the engine, it would smell sweet, like burning coolant... you do run coolant don't you?

X2