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Old 06-30-2016, 10:24 PM   #71
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... ... ... You ... don't have a failed turbo, do you? Would certainly account for (1) missing oil, (2) billowing smoke, and (3) no power. Oil could possibly be in the tube going from turbo to air intercooler (has this happen on a Volvo w/ ISX Cummins), if it didn't go out the exhaust.

He did pull the turbo tubes?
Could a bad connection cause the same?
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Old 06-30-2016, 10:49 PM   #72
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Pulling for you Dred. Keep us updated if you can.
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Old 06-30-2016, 10:58 PM   #73
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He did pull the turbo tubes?
Could a bad connection cause the same?
Once had a couple bad hoses from turbo to intercooler - intercooler to engine, causing a loss of turbo boost. Would account for smoke and power, but not necessarily oil loss. Oil's gotta be going somewhere. If it's not in the engine (or cooling system), then it either went on the ground, into the intake, or out the exhaust.

With a major engine disassembly and reassembly, there's always the chance something wasn't hooked up tight ... or a weak connection could fail.
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Old 06-30-2016, 11:02 PM   #74
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Pulling for you Dred. Keep us updated if you can.
I have not felt this low in quote some time, thanks for the support
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Old 06-30-2016, 11:04 PM   #75
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Would be helpful to know, what flavor engine is in yer bus?
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Old 06-30-2016, 11:04 PM   #76
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Once had a couple bad hoses from turbo to intercooler - intercooler to engine, causing a loss of turbo boost. Would account for smoke and power, but not necessarily oil loss. Oil's gotta be going somewhere. If it's not in the engine (or cooling system), then it either went on the ground, into the intake, or out the exhaust.

With a major engine disassembly and reassembly, there's always the chance something wasn't hooked up tight ... or a weak connection could fail.
Well the oil leak is back too?

If I had not SEEN him put a new gasket on I would think I get swindled?
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Old 06-30-2016, 11:06 PM   #77
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Would be helpful to know, what flavor engine is in yer bus?
cummins 5.9 turbo
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Old 06-30-2016, 11:18 PM   #78
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First things first. Need to find out where the oil is going. A failed turbo can leak (blow) oil into the intake system. Pull the hose going to the air cooler to check. While you have it off, carefully reach in and see if the turbo "guts" feel tight (fair warning, there might be sharp points in there!), and if it spins very freely.

So, having checked, you found inside the boost hose nice and dry, the turbo tight and spinning freely? Post back here and we'll see what's next. Otherwise, you're probably going to need a fresh turbo, which for a 5.9, I would expect the new one to go around $700 or so.
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Old 06-30-2016, 11:27 PM   #79
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Originally Posted by Brad_SwiftFur View Post
First things first. Need to find out where the oil is going. A failed turbo can leak (blow) oil into the intake system. Pull the hose going to the air cooler to check. While you have it off, carefully reach in and see if the turbo "guts" feel tight (fair warning, there might be sharp points in there!), and if it spins very freely.

So, having checked, you found inside the boost hose nice and dry, the turbo tight and spinning freely? Post back here and we'll see what's next. Otherwise, you're probably going to need a fresh turbo, which for a 5.9, I would expect the new one to go around $700 or so.
Come to think of it, there was a screeching sound just before I came to a stop? I thought that was pistons seizing, sounded more like a loud belt.

I will see what I can do tomorrow, lights out for now.
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Old 06-30-2016, 11:28 PM   #80
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Next, why can a turbo fail? Well, aside from the obvious age, there's disassembly/reassembly of the engine ... did something get into the oil system and work its way into the turbo bearings? There's no easy way to know after the fact. Was the boost system (basically everything between the turbo to the intake manifold) free of leaks? This can cause the turbo to spin extra fast to (try to) overcome the leaks, causing premature wear and failure. Some turbo setups have an external oil line which could get kinked ... and my big ISX Cummins has a coolant line as well (I don't think the 5.9's have this).

I'm not sure on the 5.9's, but on my ISX, there's a "wastegate" controller that somehow adjusts the turbo as I drive, optimizing the way it works and boosts. This can fail, causing power and smoke issues (a computer diagnostic should be able to catch it). There's a lot of computerized gadgets I have on an ISX that the 5.9's are not known to have.
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