Thread: white smoke and runs on 4 cylinders when cold

Hello and thank you for clarifying everything with the injectors!

I took a little holiday and today i got the car back from the garage. washers and o-rings are changed, injectors are adjusted but the problem remains. Mechanic said that it could be a cracked head that leaks some fuel into the cylinder, but it was a guess, and i'm not really conviced about that, since there is no fuel in oil nor air in the fuel that would cause poor starting.

My next step is putting some injector cleaner in fuel, and if that doesn't work maybe i will try pressure checking fuel galleries in head.
And if everything fails i will consider swapping the td5 for BMW 3.0 diesel

Buy am AMC head that's what I did cost me alot $4.2k but worth it

Originally Posted by Maciej

Hello and thank you for clarifying everything with the injectors!

I took a little holiday and today i got the car back from the garage. washers and o-rings are changed, injectors are adjusted but the problem remains. Mechanic said that it could be a cracked head that leaks some fuel into the cylinder, but it was a guess, and i'm not really conviced about that, since there is no fuel in oil nor air in the fuel that would cause poor starting.

My next step is putting some injector cleaner in fuel, and if that doesn't work maybe i will try pressure checking fuel galleries in head.
And if everything fails i will consider swapping the td5 for BMW 3.0 diesel

Some night time reading that may help.

Resources

Originally Posted by Maciej

Yes, with minimal deviations (-1 to +1), it works on all cylinders when in idle. What problem do you suggest?



No, not yet at least, my mechanic friend said that it can be risky with unit injectors.



I was thinking about that, but outside temperature is around 25*C, so i don't think thats the problem.

Yesterday I removed all the injectors and checked copper washers and the results are not very clear. There is no indication of leak of any kind on the washers, but there is some kind of brown marks on the injectors and the hole where injectors sit (you can see it on the picture, but it is even more visible in person). there is also some carbon residue on the outside diameter of the hole where the washer is located.
There was also some residue on the tip of the injectors visible on the attached picture, is it acceptable? all of them looked basically the same. Maybe i could soak tips of the injectors in something before i put them back? also, should i apply some kind of lubricant on the injectors before putting them back in the engine?
Attachment 162995Attachment 162994

THank you all for the replies, I'm really grateful!!
And sorry for any grammar errors.

Cheers, Maciej!!

first up you look to be geeting oiling past the rings...

Stop everything and check the oil for diesel dilution and level, clear the crank case ventilation system and then start it up again if all is ok (just dump and replace the oil if you need to) with the breather pipe removed.

Its also worth looking in the intercooler to manifold hose at this point.

Originally Posted by theelms66

Why not get injectors serviced whilst out.?

no real need if the balance values are accurat 0+/-1 is excellent.

before you go replacing the fuel pump read up on the return/line bleeder in the pump, many pumps have been needlessly replaced because this thing has stuck open.

once everything is done and together with the engine warmed up (60+deg c) bridge the fuel pump relay with the engine stopped and check the injector tops for leakage.

Hello!

i have been very busy for the past weeks and didn't have time to do much with my car. The only think i did is replacing the oil. This time I used 5W40 instead of 10W40, because some people said that too thick oil can mess with the hydraulic lifters (or lash adjusters). The only result is that the missfire occurs now randomly. Today i started the car on the morning (around 9-10*C) and it was running perfectly, and when i got to my job and started it again after 10 minutes or so it started to missfire. I also noticed that the plug that connects to the glowplug on cylinder no. 1 is broken, but i don't think it really matters. I have done around 1500km and there is no diesel in oil, and i didn't notice any drop in oil level. This weekend i will try to run the car with breather valve disconnected, we will see if it brings any results.

Cheers!

The low temp oil viscosity has no effect on the engine running in any Australian environment, and at engine operating temps a 0W-40 is the same viscosity as a straight SAE40 engine oil, and at any temp above approximately 10°C a 15W-40 is roughly the same viscosity as a 5W-40.

I'd be looking for oil in the loom or a dodgy engine harness/loom.

^^^ this , have you checked / or replaced injector harness ?

Originally Posted by rick130

The low temp oil viscosity has no effect on the engine running in any Australian environment, and at engine operating temps a 0W-40 is the same viscosity as a straight SAE40 engine oil, and at any temp above approximately 10°C a 15W-40 is roughly the same viscosity as a 5W-40.

I'd be looking for oil in the loom or a dodgy engine harness/loom.

I agree with Rick the misfiring won’t be because of the oil viscosity.

But in a Poland winter then 5W/30 is recommended by LR for -30°C to 35°C climates.