Hilux 4x4 Forum

pietpetoors wrote: ↑Thu Jun 22, 2017 12:35 pm Welcome to the forum Theresa
Does it use water?

Normally white smoke = engine oil burning.
If driving short distances the black water might be condensation and because the inside of the exhaust is black due to diesel fumes the water becomes black. But if you drove a far distance and water is still coming out from the back it is not normal.

GRWLR ZN wrote: ↑Thu Jun 22, 2017 3:42 pm Good day Theresa,
Welcome to the forum.

I assume that this is a new vehicle? All new vehichle's exhaust systems are fitted with catalytic converters.
The function of these are to convert the harmful exhaust gasses into water vapour and less harmful gasses.
Like Pieter said, if you travel mostly short distances it is normal to have some water present, but even with a catalytic converter fitted it should go awayif you travel longer distances.

Massive puffs, or a constant column of white smoke could point to a more serious problem. Oil burns white,however it will have a blue-ish to grey-ish tinge to it and will smell quite bad.

A bit of "steam-ish" white smoke is not to worry about.

Very hot and humid weather conditions can also contribute water vapour build up in the exhaust, especially when the vehicle is parked overnight.

Mud Dog wrote: ↑Thu Jun 22, 2017 3:48 pm Welcome Theresa!

I'm not a diesel head, but if it's water it can only come from four places - window washer, air conditioner condensation, leaking coolant or condensation from the exhaust due to ambient moisture over night or due to leaking coolant passing through the motor. From what you describe as it bring "gummy", neither of those possibilities seem likely unless it's coming from the cat and I'm wondering if it's not possibly diesel fuel related.

Where in relation to the vehicle dies this discharge occur? Engine area? Centre or rear of the vehicle? Have you checked from underneath to see where it's coming from?

What is the mileage on the vehicle? Black smoke is normally from excessive fuel and white smoke is from oil - it could well be that there is a turbo problem again or even a problem with the valve stem seals. You say it's not burning oil, but how often do you need to top it up?

Mud Dog wrote: ↑Thu Jun 22, 2017 3:48 pm Welcome Theresa!

I'm not a diesel head, but if it's water it can only come from four places - window washer, air conditioner condensation, leaking coolant or condensation from the exhaust due to ambient moisture over night or due to leaking coolant passing through the motor. From what you describe as it bring "gummy", neither of those possibilities seem likely unless it's coming from the cat and I'm wondering if it's not possibly diesel fuel related.

Where in relation to the vehicle dies this discharge occur? Engine area? Centre or rear of the vehicle? Have you checked from underneath to see where it's coming from?

What is the mileage on the vehicle? Black smoke is normally from excessive fuel and white smoke is from oil - it could well be that there is a turbo problem again or even a problem with the valve stem seals. You say it's not burning oil, but how often do you need to top it up?

Obelix and Dogmatix wrote: ↑Fri Jun 23, 2017 8:47 am Okay, shot in the dark but is the diesel pump properly calibrated? if it is over fuelling it could also cause a lot of smoke. may be worth a check.

And good Luck

theresa wrote: ↑Fri Jun 23, 2017 12:44 pm

Obelix and Dogmatix wrote: ↑Fri Jun 23, 2017 8:47 am Okay, shot in the dark but is the diesel pump properly calibrated? if it is over fuelling it could also cause a lot of smoke. may be worth a check.

And good Luck

Thanks, I will have the calibration of the fuel pump checked. If the calibration is out, will the smoke be white?

GRWLR ZN wrote: ↑Fri Jun 23, 2017 2:40 pm Let me just be clear, when i say drain out a bit of fuel, it must be from the fuel tank and not the filter or water seperator.