gearing behind a diesel

[bigbrowndog]

White smoke can be caused by retarded timing also by a blocked fuel filter [ usually at higher revs.]
Black smoke can also be caused by the timing being too far advanced, overfueling and low nozzle pressure .

 

[yotawheeler]

ok so would it be safe to say that if there is any amount of smoke be it black, white or blue that the engine has some issues that should be resolved? not saying its a serious issue but has issues?

 

[crushers]

if the smoke is excessive then yes. certain engines pump out more smoke than others, it is the nature of the beast...

 

[Tapage]

certain engines pump out more smoke than others, it is the nature of the beast...

nice slogan Wayne .. !

 

[yotawheeler]

ok.

 

[roscoFJ73]

ok so would it be safe to say that if there is any amount of smoke be it black, white or blue that the engine has some issues that should be resolved? not saying its a serious issue but has issues?

IMO blue is the worst because its oil burning smoke. If your getting a cloud of blue smoke on take off after sitting at the lights it is usually the valve gude seals allowing oil to enter the combustion chamber so when you apply the throttle the engine heats up and burns the oil more quickly.

A constant plume of blue smoke is most likely worn rings.

Yes ,issues of some kind,however as Wayne says different engines particuarly older designs blow more smoke as they were designed in less smog conscious days.
On the Toyota 1HD FTE diesels, the Europeans have different injector opening pressures compared to the Australian version.
This is because the EU has higher anti pollution standards and Australian versions would probably be quicker on take off(my perspective)
Older designs like the 12HT Toyota dump more fuel (than it can handle)into the engine when you flatten the pedal resulting in a puff of black smoke.
This trait probably brought about its demise by not being able to comply with Japanese and EU standards