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Cummins n14
That should get the shop manual.
Good luck.
N14 Top End Knock
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by SpeedyGonzalez, Sep 3, 2019.
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Premco out of Lampasas, TX. -
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There is a specific brush that is used to clean the injector cups. It MUST be used before the install. As far as fuel on the top of the piston is concerned, a plastic tube adapted to a vacuum is the best way to get down to the top of the piston.
SpeedyGonzalez Thanks this. -
Edit: found them online, it looks like theirs three, a spiral brush, and then two normal brushes. I'm assuming the spiral brush is the one to use, according to their site its stainless steel filaments.Last edited: Sep 5, 2019
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Call these guys.
Specialty automotive diesel tools & diagnostic tools including NEXIQ USB-Link: Apex Tools
There are different size brushes for different bore sizes.SpeedyGonzalez Thanks this. -
The tech at the dealer is convinced the injector is stuck open and recommended I inspect the piston crown, the driver drove it about 1000 miles in its condition so I'm hoping the piston isn't torched. Any odds on the likelihood its torched?Last edited: Sep 6, 2019
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If he was seeing a lot of black smoke it's highly likely that it got too hot.
Nylon bristles are worthless.SpeedyGonzalez Thanks this. -
Where's @spyder7723? Thought he was the n14 guru?
@Bakerman knows his way around one too.Last edited: Sep 6, 2019
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I'm with you on the nylon, but figured it would be worth the try, driver wants to get back on the road ASAP and it's either a nylon brush or some brass wool for cleaning it out because he doesn't want to stick around for the end of the weekend.
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