Did a Cylinder cutout test and cylinder 5 is bad. I'm going to finish driving for the week, parked the truck for a while and talk to a diesel mechanic about a overhaul .
Thanks for the advice guys.
DD15 Cylinder Liner/Head/Piston/Rocker ???
Discussion in 'Trucks [ Eighteen Wheelers ]' started by DriverHaze, Dec 28, 2025 at 11:34 AM.
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A cutout didn't tell you cylinder 5 is bad, just that your issue is with cylinder 5.
Exactly what happened when you cut out cylinder 5? Lose the noise or smoke? -
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What's PAI kits like for a dd15? Any good?
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Use the Relative Compression Test. The Mechanical Compression Test is way more involved.
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I've seen YouTube videos of their liners failing. I wouldn't chance it.
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