Blow by, blue smoke, shuttering c15

Vipercat · Mar 18, 2020

FoolsErrand said: ↑

If its drinking oil and fogging out the intersection youre gonna need that overhaul sooner than later.

They have high compression and high boost. They take ring lands off the piston. Lot of guys go back down to a lower compression piston and have better reliability. I think i was told its an oem marine application piston but dont hold me to that part. We have one c15 that just got overhauled and it did what u describe. The oil pressure gets low enough and itll derate. Will feel like hitting a brick wall when maxxed out and pointed up the mountain. Then itll surge back up and derate again.
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Rideandrepair said: ↑

My Detroit was doing that, I think the fuel lines are sucking air between tanks and pump. Check for bubbles in fuel tanks,if so it’s coming from the return lines.
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I will have a look tomorrow morning. I was suspecting something was off with the fuel filter to. This particular model has a water separate er aswell though.

6wheeler · Mar 19, 2020

Vipercat said: ↑

The truck had a fleet guard fuel filter when I bought it, but I replaced it with Donaldson. I think the micron filter is a little different? Either way this seems plausible as the fuel filter is currently wet(looks like it leaks a little fuel out the top) but never noticed it with the fleet guard... I actually wanted to get the same one but the guy at the truck shop said Donaldsons are just plain better.

It was my thinking that blue smoke was an oil issue and not fuel though?
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Blue smoke is fuel. Water in the fuel, fuel injector bad, intake/exhaust value cracked.

Water is in diesel everywhere. Could be a fuel injector but I would bet water is in the filter or tanks

pushbroom · Mar 19, 2020

Usually don't worry about blowby til oil consumption or low power/fuel mileage get horrible.

Shutter sound could be IVA's, low fuel pressure or even an injector starting to go. Any codes when hooked to a laptop? Whats the fuel pressure at?

Vipercat · Mar 19, 2020

pushbroom said: ↑

Usually don't worry about blowby til oil consumption or low power/fuel mileage get horrible.

Shutter sound could be IVA's, low fuel pressure or even an injector starting to go. Any codes when hooked to a laptop? Whats the fuel pressure at?
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Iva through a code and was replaced, haven’t hooked up a computer and fuel pressure gauge is out of whack so not sure. Will
Be throwing a new head/injectors etc etc on soon though. Would a bad injector cause blue smoke though? Always thought blue=oil

Shawn2130 · Mar 20, 2020

Blue smoke is also an injector not spraying right, dribbling.

Diesel is a type of oil.

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