JX not boosting and haemorrhageing oil :-(
Posted: 01 Jul 2018, 10:07
My JX was running reasonably until a spirited run out the other day, when I noticed it's occasional drip of oil had become a few drips. It had also lost some power. Over the next few short trips out, only a few miles, the bus got slower and the oil leaks were enough to make rear of the bus look like a dalmatian!
Plumbed a boost gauge in the other day and on a foot flat down run I'm seeing around 5psi in second, third and possibly 6psi in top, though the boost seems to tail off and drop to nothing when left. If I drive gently, even over a long distance, I can nearly stop the oil leaks. The leaks are from a few places, behind the sh*t plate, behind the cambelt cover, as well as a weep from the oil sender on the cooler/filter housing.
The turbo isn't covered in oil though, so I'm scratching my head as to why I'm not getting much boost, and as to why at the same time, oil coming out of every hole!
A few other bits of info...
The engine starts well, and other than running a bit like the CS it replaced, feels good, if a little 'unrevvy'.
Its not running hot at all, in fact despite this hot weather, it's running well.
BOV has an allen screw stopping it opening.
I've turned the main fueling screw up to see if it was a fuel restriction, but even when I've got an unhealthy dose of black smoke, he ain't boosting ( screw returned to standard )
Doesn't burn oil, and just a haze on an evening when cars follow with their lights on.
Exhaust manifold and inlet are tight - suspect my exhaust manifold is just a bit warped, so I'm always on to of it
Preload adjuster on the beehive type wastegate is screwed well in.
LDA passes the thumb test - pull it open, and it stays open until I take my thumb off the inlet.
I'm hands on, but no expert by a long shot, so I could be misleading you here!
So that's all I know. I worry the the oil leaks are caused by crank case pressure, but I run a turbo bug, so I'm paranoid about such things. I'm wondering if the turbo is restricting exhaust flow and causing an increase in crank pressure.
So, solving stuff.
I'm tempted to pull the air filter housing off, so that I can rule out blocked airways.
Maybe check the engine breather.
I can't see or hear a boost leak, but if anywhere, I guess it must be in the single short flexi pipe.
Wastegate stuck open?
Any ideas guys? I'm not initially looking to stop leaks, but to suss why all of a sudden have I lost power and started leaking everywhere.
Thanks in advance.
Plumbed a boost gauge in the other day and on a foot flat down run I'm seeing around 5psi in second, third and possibly 6psi in top, though the boost seems to tail off and drop to nothing when left. If I drive gently, even over a long distance, I can nearly stop the oil leaks. The leaks are from a few places, behind the sh*t plate, behind the cambelt cover, as well as a weep from the oil sender on the cooler/filter housing.
The turbo isn't covered in oil though, so I'm scratching my head as to why I'm not getting much boost, and as to why at the same time, oil coming out of every hole!
A few other bits of info...
The engine starts well, and other than running a bit like the CS it replaced, feels good, if a little 'unrevvy'.
Its not running hot at all, in fact despite this hot weather, it's running well.
BOV has an allen screw stopping it opening.
I've turned the main fueling screw up to see if it was a fuel restriction, but even when I've got an unhealthy dose of black smoke, he ain't boosting ( screw returned to standard )
Doesn't burn oil, and just a haze on an evening when cars follow with their lights on.
Exhaust manifold and inlet are tight - suspect my exhaust manifold is just a bit warped, so I'm always on to of it
Preload adjuster on the beehive type wastegate is screwed well in.
LDA passes the thumb test - pull it open, and it stays open until I take my thumb off the inlet.
I'm hands on, but no expert by a long shot, so I could be misleading you here!
So that's all I know. I worry the the oil leaks are caused by crank case pressure, but I run a turbo bug, so I'm paranoid about such things. I'm wondering if the turbo is restricting exhaust flow and causing an increase in crank pressure.
So, solving stuff.
I'm tempted to pull the air filter housing off, so that I can rule out blocked airways.
Maybe check the engine breather.
I can't see or hear a boost leak, but if anywhere, I guess it must be in the single short flexi pipe.
Wastegate stuck open?
Any ideas guys? I'm not initially looking to stop leaks, but to suss why all of a sudden have I lost power and started leaking everywhere.
Thanks in advance.