740B blowing fuel

[Aussietech]

I have a 740B haul truck
S/N T4R01716 roughly 13,000hrs

Machine is blowing blue/white smoke. We have replaced the head gasket,
We have replaced all 6 injectors with remain ones from a local diesel shop ,Have done injectior cut out tests, passed every time.
Have had the DPF filter cleaned,
We have installed new EGR cooler with new
Have put coolant pressure gauge on for 12hrs no drop in pressure
No coolant in the oil
No loss of oil
At full rpm the smoke goes away, when idling the smoke comes back,

 

[Nige]

I have a 740B haul truck
S/N T4R01716 roughly 13,000hrs

Getting close to engine overhaul time with those hours.

Machine is blowing blue/white smoke. We have replaced the head gasket,

Before or after it started blowing smoke.?

How a bit of back story about how the smoking at idle got to this point.?
Got worse & worse over an extended time (weeks, months, longer.?) or literally appeared from one day to the next.?

Is the engine burning any oil.?
Do you have access to Cat ET.?

 

[Aussietech]

Replaced head gasket after it started blowing smoke,

Started smoking machine was shut down within a week, replaced head gasket, sent back to work for 3 days
Returned to work shop with lots and lots of smoke,
Cut out test said 1&6 injectors failed, replaced all 6 with rebuilt ones,

Blowing less smoke after that, but still enough to see it and cause a issue

Not burning oil
Yes I do,

Also pulled the engine oil, with less the 50hrs on it,
Smelt a lot like exhaust fumes in the oil

 

[Nige]

Have you downloaded a Product Status Report in pdf format using ET.? If not it might be a good idea.

 

[Nige]

Cut out test said 1&6 injectors failed, replaced all 6 with rebuilt ones,

Rebuilt at a specialist shop or OEM Reman.?
Trim Codes all set.?

 

[Aussietech]

Have you downloaded a Product Status Report in pdf format using ET.? If not it might be a good idea.

I can do it once I get back to it

 

[Aussietech]

Rebuilt at a specialist shop or OEM Reman
Trim Codes all set.?

At a specialist shop

 

[Nige]

At a specialist shop

A bit difficult not knowing if they have equipment for testing electronic injectors to validate the Trim Codes or change them if necessary. Bugger.

 

[ahart]

A couple of questions:
1- do you have any oil sample data for this machine?
2- is there another T4R on site?

 

[Dave Neubert]

Did you rebuild head wile off could be wore valve guides