That sir, is a problem. Are the cooling nozzles twisted, or is it the piston dimensions that are off?
Cracked LML pistons
- Thread starter CaptPhil
- Start date
That sir, is a problem. Are the cooling nozzles twisted, or is it the piston dimensions that are off?
The only cracked lml pistons I have heard of were on trucks with H & S tuners.
I have never heard of an lml piston crack efilive.
I have abused some lml pistons badly. They were delipped.
Get the owner some tunes from Kory this time.
I have never heard of an lml piston crack efilive.
I have abused some lml pistons badly. They were delipped.
Get the owner some tunes from Kory this time.
Exactly I am in the same boat I've loaded your tunes and mine no cracked pistons... people need a brain when using these trucks and not tow on max effort tuning
My truck never comes off kill mode, but when I tow I don't use more than like 450hp. It's so crazy how your foot can control fueling... Just nuts huh? Lol
Lotta truth right there, my own truck (lbz) i dd and tow @ about 600hp, prob only use 400-450 or so, truck has 240k on the clock right now!
I know weird concept right? I Dd on a 700 rwhp tune have for over a year even towed a skidster
I saw that post On FB last night, phone does not do it justice, but looking at that scar pattern, the majority of the burn took place right at the crack, were all 5 holes similar?
Though it seems you hear more and more about a cracked piston or two on the LML are they year specific? i only ask, because I have to agree with Kory on this one, I had just the H&S tune prior to MCC and it never left HOT. towed with it so the right foot will play a lot into it, but what confuses me is the heat was only concentrated to the one side, which leads me to believe either to early with injection or misaligned injectors?
Off base here? I open to criticism can only learn better by asking
Though it seems you hear more and more about a cracked piston or two on the LML are they year specific? i only ask, because I have to agree with Kory on this one, I had just the H&S tune prior to MCC and it never left HOT. towed with it so the right foot will play a lot into it, but what confuses me is the heat was only concentrated to the one side, which leads me to believe either to early with injection or misaligned injectors?
Off base here? I open to criticism can only learn better by asking
Stock trans, just h&s and dpf delete. This truck towed for a living, but we're talking 30k+ gcw, not just a skid steer or something. In fact, the co. That had this truck hauled a case 580k backhoe out for us with there new pickup that replaced this lml. Driver said he used to drive a dmax but it always used antifreeze and they could never figure it out, so they traded it.
Do they not have a locating pin? Was the oil coking on the bottom side of the piston?
yes, pins get them close but are never perfect on any engine. yes all are burnt on the underside.
Sounds like she got real hot. I could definatly see them cracking from not having proper oiling to cool them. Seen it before I'm the semis.
High oil temps most likely. Anything over 250F post oil cooler usually doesn't do much good for the pistons. Cut one open and see if they're clogged internally.
I work on mainly Cummins med/hd and the cooling nozzles are never off as far as you make it seem this engine was.
High oil temps most likely. Anything over 250F post oil cooler usually doesn't do much good for the pistons. Cut one open and see if they're clogged internally.
I work on mainly Cummins med/hd and the cooling nozzles are never off as far as you make it seem this engine was.
im prob makin it up then, have you ever been in a dmax? the nozzle is easily movable 1/4" maybe more, i never measured, i just make sure they are aligned when i put engines together.
I'm not saying you're wrong. Never cracked open the bottom end on a Dmax, sorry. Locating tabs/pins on Cummins engines fit tighter than that!
I agree with you Caleb, but I have a question: have you seen significant damage caused by prolonged run time of a cast piston which was starved of oil supply due to a broken squirter?
i have never seen one with a broken squirter other than an engine with major failure so i cant say for sure on that. i can say the wrist pins and bushings were all ok in this engine so even though they were not aligned as good as id wanna see them, im not sure there was a shortage of oil in the area. just me thinkin out loud there though.