Need help l4850 5cyl 2503di

[Mike Harrison]

I just installed new pistons and ring. Put everything back together but it wont start. I have white smoke. (It tryes to turn black ) I set the vales at .20 crack the fuel lines (one at a time) at the injectors. I have fuel but not much pressure. just a note i had the head and injuctors done. kind of wants to start anyone have any ideal

 

[PoTreeBoy]

I just installed new pistons and ring. Put everything back together but it wont start. I have white smoke. (It tryes to turn black ) I set the valves at .20 crack the fuel lines (one at a time) at the injectors. I have fuel but not much pressure. just a note i had the head and injectors done. kind of wants to start anyone have any ideal

Is that 0.2 mm (0.008")?

 

[North Idaho Wolfman]

Yes Clarify valves at .2mm or .008"?

New injectors or rebuilt?
Source of the injectors?

Did you remove the injection pump?
If you did, did you reinstall all of the shims that were under the pump?

You might still have air in the injector lines, crack all of them at the injectors and crank in short intervals till you get clear fuel with no bubbles to all of the injectors.
You will not get pressure when you crack the lines, that's normal.

Have you verified that the glow plugs are working?

 

[Mike Harrison]

Had the injectors tested new seals on the head I checked the valve clearance before I took the motor apart. The clearance on the valves was .14 when I reinstalled the valves the dealer told me to set the valves at .20. I have fuel at the end of the hardline just before it hits the injectors OHM out the glow plugs before I reinstalled them.

 

[Russell King]

@Mike Harrison

You did not answer the questions above on what units of measurement you are using. Is the .2 in inches or in millimeters.

There is a huge difference and having .2 inches of clearances is way too much and you are probably aware of that. But these people don’t know and the answer will lead them down different paths so it would be good if you would answer them.

 

[North Idaho Wolfman]

Had the injectors tested new seals on the head I checked the valve clearance before I took the motor apart. The clearance on the valves was .14 when I reinstalled the valves the dealer told me to set the valves at .20. I have fuel at the end of the hardline just before it hits the injectors OHM out the glow plugs before I reinstalled them.

.14 and .20 what???
If it's thousands, you're way off on valve clearance.

 

[Mike Harrison]

.14 and .20 what???
If it's thousands, you're way off on valve clearance.

View attachment 164862

 

[Mike Harrison]

. 20mm

 

[whitetiger]

.008" = .2032mm