Engine or turbo issue?
02-10-2017, 07:59 PM
#1
Engine or turbo issue?
Spring is getting closer so its almost time to tear into the cobalt and find the source of some issues I had last year.
I am noticing significant oil build up in the charge pipes, significant enough to foul up my 3bar Map sensors.
Stock turbo, 130k km.
Compression test was a little low on cylinder 2, (120ish psi compared to 140-150 on the other 3).
Engine runs fine until the oil builds up on the charge pipes, then it throws a couple codes, typically a P0107, P2199, P0106 and sometimes a P0101, and it usually misfires or cuts boost at moderate load. Clean the sensors, problem goes away.
Will probably do a leak down test on the engine come spring, but what is the best way to diagnose a leaky turbo?
Its also worth noting that oil consumption is pretty low considering the residue ive been finding on the charge pipes, what are the odds that a ton of it is stuck inside the IC?
I am noticing significant oil build up in the charge pipes, significant enough to foul up my 3bar Map sensors.
Stock turbo, 130k km.
Compression test was a little low on cylinder 2, (120ish psi compared to 140-150 on the other 3).
Engine runs fine until the oil builds up on the charge pipes, then it throws a couple codes, typically a P0107, P2199, P0106 and sometimes a P0101, and it usually misfires or cuts boost at moderate load. Clean the sensors, problem goes away.
Will probably do a leak down test on the engine come spring, but what is the best way to diagnose a leaky turbo?
Its also worth noting that oil consumption is pretty low considering the residue ive been finding on the charge pipes, what are the odds that a ton of it is stuck inside the IC?
02-15-2017, 05:35 PM
#4
I agree that the cylinder seems low. Which Is why I plan on doing a leak down test. Other than the issues caused by the oil the engine runs fine. I'd just like to be able to confirm the turbo isn't bad before I pull a motor out seeing as its a much more significant job. I'd just pull the head off and check but I don't want to pull the injectors out since I don't have the tool.to reinstall new seals.
02-22-2017, 11:08 AM
#6
In all honesty if there's anything wrong with the motor I'm probably just going to swap it with an ldk or Lhu instead of trying to fix the lnf.
I'm still curious if there's any way to test or what to look for in a bad turbo causing oil issues. I'd like to look at that and make sure that it's not also causing issues before I spend a bunch of time and money on an engine swap.
I'm still curious if there's any way to test or what to look for in a bad turbo causing oil issues. I'd like to look at that and make sure that it's not also causing issues before I spend a bunch of time and money on an engine swap.
02-22-2017, 11:15 AM
#7
you could take off the o2 housing and see if there is a ton of oil getting past the seal. sometimes when turbo seals go out, the oil is pushed into the exhaust and you will see a oil like soup in/on the exhaust wheel.