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2018 6.7 knocking??

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Old

Dec 7, 2019 | 11:33 AM

#1

Dixie1392

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2018 6.7 knocking??

2018 f350 6.7 started knocking in Saint Louis MO. Drove it apprx 390 miles (expecting to be towed before I made it home) sounds like a rod knocking but i don't believe it would have made it 390 miles without throwing the rod. Its had regular oil changes every 5-6000 miles. He uses Lucas diesel injector cleaner in it from time to time. Had to replace battery the day before and cleans his k&n filter all the time. It has apprx 165k on it & is no where near paid for. I need help!!!!

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Old

Dec 7, 2019 | 01:16 PM

#2

ncl

Fleet Mechanic

Joined: Oct 2003

Posts: 1,371

Likes: 10

From: Green Springs, OH

Maybe post this in the 6.7 forum. Why put a k&n on a new truck especially a turbo engine. You need the best filter possible and that is OEM. Everything else stock on the truck?

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Old

Dec 7, 2019 | 01:24 PM

#3

98ramtough

Mountain Pass

Joined: Nov 2019

Posts: 168

Likes: 1

Wow that is a lot of miles on a 2018.

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Old

Dec 7, 2019 | 01:34 PM

#4

DEW34

Senior User

Joined: Jun 2007

Posts: 262

Likes: 8

Is the noise coming from the bottom of the motor or the top , could be a fuel knock from an injector , did this happen after fueling up?

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Old

Dec 7, 2019 | 01:45 PM

#5

Lamoon78

Fleet Mechanic

Joined: Nov 2019

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From: Livingston Tx

No K&N on a turbo engine take that out.

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Old

Dec 7, 2019 | 06:45 PM

#6

Dixie1392

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It's in the lower end. We put apprx 100k on our trucks a year. When they reach 200k, we trade them in.

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Old

Dec 7, 2019 | 07:49 PM

#7

DEW34

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Joined: Jun 2007

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Well that sucks !! if its coming from the bottom .

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Old

Dec 7, 2019 | 07:54 PM

#8

ncl

Fleet Mechanic

Joined: Oct 2003

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From: Green Springs, OH

Quote:

Originally Posted by Dixie1392

It's in the lower end. We put apprx 100k on our trucks a year. When they reach 200k, we trade them in.

Trade it in then.

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Old

Dec 7, 2019 | 08:05 PM

#9

ford390gashog

Fleet Owner

Joined: Jan 2004

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From: Brentwood,CA

Club FTE Gold Member

Quote:

Originally Posted by ncl

Trade it in then.

Obvious solution, I agree

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Old

Dec 7, 2019 | 08:31 PM

#10

samuse

Senior User

Joined: Oct 2019

Posts: 407

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I'd yank the K&N and don't mention the Lucas.

BOTH of those products are some the worst things you can put on a truck.

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Old

Dec 8, 2019 | 11:17 AM

#11

Dixie1392

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If you think it's an injector, what would you do? Will it throw a code?

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Old

Dec 8, 2019 | 12:15 PM

#12

67L48

Posting Guru

Joined: Jun 2018

Posts: 1,366

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From: Frederick, CO

Quote:

Originally Posted by Lamoon78

No K&N on a turbo engine take that out.

x10. In fact, I'd correct that to "No K&N on any engine." High risk, no reward. At best, an K&N functions about as well as a crappy paper filter. At worst, it doesn't filter very well at all and can leach out crap into your engine. And, if he really cleans his K&N all the time as stated, this probably just makes it worse.

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Old

Dec 8, 2019 | 12:22 PM

#13

George C

Cargo Master

Joined: Oct 2005

Posts: 2,866

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From: WNY

Another K&N on a diesel... I wouldn’t install one of those things on YOUR lawn mower,
A clean K&N is as bad as no filter at all. They need dirt to help filter and plug the wide open holes in the gauze..

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Old

Dec 8, 2019 | 01:06 PM

#14

ncl

Fleet Mechanic

Joined: Oct 2003

Posts: 1,371

Likes: 10

From: Green Springs, OH

Quote:

Originally Posted by George C

Another K&N on a diesel... I wouldn’t install one of those things on YOUR lawn mower,
A clean K&N is as bad as no filter at all. They need dirt to help filter and plug the wide open holes in the gauze..

True and the filter is worthless if it's not oiled correctly. Old out of date theory. Oil bath air filters.

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Old

Dec 8, 2019 | 01:15 PM

#15

Dixie1392

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Ok, I understand about the K&N. Now can we please get to the knocking?

If it's an injector, is there a way to tell for sure? Do I need to Drain fuel, replace with new, add conditioner,???

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