Not seeking for help, I’m just showing off my blow motor. No worries the Jeep will live another day it’s getting a new (to me) motor put in soon.
Cylinder 6 piston failed
- Thread starter BrunoPizz97
- Start date
John Scoggins
TJ Enthusiast
OP
Well if you remember back about 3 weeks ago I posted on the forum about rod knock " https://wranglertjforum.com/threads/is-this-rod-knock.30833/#post-497894 " and I was about 160 miles away from home. Guess its safe to say its not rod knock
That's right, now I remember!
Definitely not rod knock at all. Makes me wonder how this happened though, as this doesn't typically happen to 4.0s.
xxdabroxx
TJ Addict
OP
OP
My mechanic says that the aluminum piston probably got fatigue since aluminum gets porous and less dense over time from stress and will lead to cracking. Said that aluminum is weird, that some aluminum pistons can last forever and some can last not so long.
Have you thought about just cleaning it up and running it for awhile so you can find where the problem is?
ejay
TJ Addict
An XJ I bought years ago had the same issue. Piston skirt/sleeve #1 shattered. #1 being closest to the front of the vehicle. I was told later that when your oil pump is going out that's the first cylinder to suffer. Don't know how true that is. Doesn't really matter after the fact.
OP
Customer service *did you try turning it on and off *Huh? The problem is he only has half a piston
Did I miss something?
xxdabroxx
TJ Addict
I thought they gave us 6 cylinders so we had extra. Just pull out the broken pieces and keep on truckin.
Huh? The problem is he only has half a piston
Did I miss something?
Might clear up with some heavier weight oil
Jeepn_Texas
TJ Enthusiast
I saw an engine do that... after checking the Fuel injectors we found the one that was in that cylinder, was not closing and was putting raw few into the cylinder constantly. We saw a lower MPG a few days before the failure and then the piston failed. It looked like skirt failure caused by the rings seizing in the cylinder. Also, the oil was a bit thinner than usual. any of this match-up to your failure?
It could also be from a lean condition due to a partial clogged injector, what did the plug look like?
Vidar
TJ Enthusiast
OP
Actually I didn’t have any of those symptoms, my oil looked good. I got about 17 mph highway with 33” tires. The only thing that was wrong was after a long drive I heard a ticking sound