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  #11  
Old 05-16-2018, 11:39 AM
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I've done several 6.4 engine removal and installs cab-on. This is only because I do not have a lift. It's not terrible but the biggest complaint is having to be under it taking the bell housing bolts and engine mounts loose.

Someday I'll have a shop with a lift...
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  #12  
Old 05-17-2018, 11:19 AM
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Thanks for the advice, guys.

I'm worried about further damaging the engine by turning it over/ running it.

What is the relative compression test going to tell me other than a cylinder is bad. The next step will be to pull the heads, right ? Why not just go straight to that ?

Am I wrong to think that the noise is for sure caused by a mechanical issue, like cracked piston, bent rod, valve train damage ?
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I regularly pull 25K lbs with my 185 HP (but it's tired so probably closer to 170HP) 7.3 IDI all the time. It's not the HP that matters, it's the 360-ish lbs of torque that move the load.
  #13  
Old 05-18-2018, 06:52 AM
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would suck to pull the heads an find out you just had a bad injector. Based on your responses, you arent interested in doing any diagnosis. Good luck with it.
  #14  
Old 05-23-2018, 10:11 AM
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How do I diagnose a bad injector ?
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I regularly pull 25K lbs with my 185 HP (but it's tired so probably closer to 170HP) 7.3 IDI all the time. It's not the HP that matters, it's the 360-ish lbs of torque that move the load.
  #15  
Old 05-23-2018, 10:40 AM
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power balance test, relative compression and shutting each cylinder down individually to see if/what changes.
  #16  
Old 05-24-2018, 05:08 PM
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Got Auto Enginuity connected. This truck has sat for the last 5 months. Battery voltage was low. I have the charger on it now.

Pulled DTCs. Nothing significant. The alternator went out on this truck a while ago, so there were several CAN bus non communication errors and low battery voltage errors accumulated.


The only powertrain error code was
P0128 Coolant Thermostat (Coolant temperature below thermostat regulating temperature)

I ran a Key On Engine Off test. Got the following:

P0091 Fuel Pressure Regulator Control Circuit Low
P0003 Fuel Volume Regulator Control Circuit Low

Ran it again and it was clean. Ran it again and got the error again.

Ran the injector buzz test and they all passed.

The software can perform the glow plug test as well as the cylinder contribution test (engine running).

Are you thinking it is safe to run this engine ?
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I regularly pull 25K lbs with my 185 HP (but it's tired so probably closer to 170HP) 7.3 IDI all the time. It's not the HP that matters, it's the 360-ish lbs of torque that move the load.
  #17  
Old 05-24-2018, 11:00 PM
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Quote:
Originally Posted by sootie View Post
power balance test, relative compression and shutting each cylinder down individually to see if/what changes.
So you think it is safe to turn the engine over and start it ?

AE doesn't do the relative compression test. But it will do power balance and you can shut off injectors.

Any chance a glow plug broke off and is hammering on a piston ?
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I regularly pull 25K lbs with my 185 HP (but it's tired so probably closer to 170HP) 7.3 IDI all the time. It's not the HP that matters, it's the 360-ish lbs of torque that move the load.
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