Bad injector, engine failure

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Jun 18, 2013 | 08:19 PM

#16

Tom

Super Moderator

Joined: Aug 2003

Posts: 25,479

Likes: 742

From: Isanti, MN

Thanks for posting the update! Tuner advocates like to insist that in stock configuration they won't last long, but this demonstrates that this isn't necessarily the case.

Jun 18, 2013 | 08:56 PM

#17

StanleyZ

Logistics Pro

Joined: Nov 2001

Posts: 3,788

Likes: 103

From: Georgia

Quote:

Originally Posted by oxbronco

I know this is pretty old, but I thought some of you would be interested to know that It turned out being a broken rocker arm. Thats it! It did make a horrble racket though. They ended up changing the whole rocker assembly on that side. The final bill was just under $1,000. A heck of alot better than 12-15 thousand. He also has just over 300,000 on it now. Still running completly stock.

Failed rocker arms have been a recurring problem in the 6.4s. I don't remember if the truck in question is stock but my theory is that the rockers fail because they are at the end of the oil lubrication stream and the diluted oil just don't quite keep them sufficiently lubricated. I agree 280,000 miles is pretty good, but still there is no reason the rockers should fail at that mileage. Besides, if my memory serves some of the other rocker arm failures were at 120,000 or so.

Jun 19, 2013 | 11:23 AM

#18

parkland

Lead Driver

Joined: Jan 2006

Posts: 6,267

Likes: 5

Quote:

Originally Posted by Crazy001

Thanks for posting the update! Tuner advocates like to insist that in stock configuration they won't last long, but this demonstrates that this isn't necessarily the case.

I saw a f450 cube truck with huge mileage, and it was 100% stock and still ran great.
I think the problems start when someone uses the 6.4 for soccer mom chores.