LBZ: just split a piston at 250fwhp [Archive] - Duramax Diesels Forum

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malibu795
11-21-2012, 05:49 PM
just happened couple hours ago about 1600 today.. just north of wytheville VA
haulling this whitch is 7 high 7 wide 8 long GVW is 23,000lb its currently tarped but still catched allot of wind..
http://sphotos-a.xx.fbcdn.net/hphotos-snc6/178960_4538342490194_816702289_n.jpg
symptoms very rough idle and blow by pulsing out the oil dipstick insnic with dead miss and loss of power.

i dont know what the oil temp was.. but im guesing i get oil temps down it would keep pistons cooler.. what can be done to the oil squirters? open them up .00X"?

couple options...
1)no damage to cylinder wall... swap in new rod and piston..
2) damage to cylinder wall... sleave block new rod and piston
3) new short block

and increase oil cooling capacity.

right now it looks like i will be eating left overs im ~300 miles from home :o

lotsofmiles
11-21-2012, 06:04 PM
that sucks.

whitetrash21
11-21-2012, 06:07 PM
You've only had that in for a couple mos, right?? High mile donor??

Sorry to see that, especially when it's your livelihood

adeso
11-21-2012, 06:17 PM
ok first off, WTF is that thing
I don't see you getting the oil with a all stock truck unless you were running it really hard. I would put a oil temp gage in first if you are worried about it to see if you need to mess with it at all. What RPM/EGT/boost were you running? and yea, seems like a piston.

DBUSHLB7
11-21-2012, 06:24 PM
Sorry to hear it man. Good luck for a speedy recovery

Fingers
11-21-2012, 06:29 PM
I've seen one of those before. Mixer of some sort IIRC.

Cooler oil would help, cooler charge with more air would work better.

JMO

Call, I might have something for ya.

malibu795
11-21-2012, 06:30 PM
You've only had that in for a couple mos, right?? High mile donor??

Sorry to see that, especially when it's your livelihood
i got the engine with 98k on it there is 142k on it now came out of a 06 3500service van
ok first off, WTF is that thing
I don't see you getting the oil with a all stock truck unless you were running it really hard. I would put a oil temp gage in first if you are worried about it to see if you need to mess with it at all. What RPM/EGT/boost were you running? and yea, seems like a piston.

the knives in a paper shredder.. from domtar paper company headed to get rebuilt.

4.63 gears 31.5" tires is 2600 rpm @70. .75 od (4l85E tranny)
i was running 65 which is ~2400rpm
ECT normal to cold at 185-190*
boost 8-10psi normal for a high sail load... low sail is 5-8psi at same speed
timing ~8-9* at cruise
havent been able to get an EGT to work reliably autometer 1600 or a 2000
i find it very hard to believe that the engine at 250hp would run hotter then then 360hp LBZ engines

adeso
11-21-2012, 08:04 PM
If something is going on high EGTs would lead to high oil temps and not happy pistons. How was your oil PSI? steady and normal? who knows maybe you just got one with a flaw in it

malibu795
11-21-2012, 08:27 PM
Normal oil pressure put almost50k weighing an avg of 23,000lb for an easy 90% of those miles

lotsofmiles
11-21-2012, 08:35 PM
4.63 gears? Those rpms sound close to 3.73 with 265's? 265's are 31.6? Iirc

malibu795
11-21-2012, 10:05 PM
4.63 gears? Those rpms sound close to 3.73 with 265's? 265's are 31.6? Iirc

225/70/19.5 (32.7)with the .75 od on the 4l85
3.73 would be 1800 @65 vs 2300 @ 65
bald they are bout 31.5 18/32 worth of tread

adeso
11-22-2012, 01:22 AM
Sounds like you just got unlucky, whoever made your piston must have been hung over that day. if you are towing heavy a lot a oil temp gage would be a good add on

SmokeShow
11-23-2012, 05:39 PM
Sorry to go OT but did u pick up the mixer at the plant in Ky?

malibu795
11-23-2012, 05:53 PM
Shredder at a domtar plant in bennettsville sc

JoeyD
11-25-2012, 08:13 AM
If you have the room under the engine, can you run a 4500-5500 oil pan? Holds 4 more quarts i think, then add a external oil cooler. Should cure any oil temp issue's.

malibu795
11-25-2012, 03:11 PM
Joey that's an idea i will look into.
lost #4 piston
info will be kept
here
http://www.duramaxdiesels.com/forum/showthread.php?t=39285&page=11

malibu795
12-03-2012, 04:20 PM
Up and running

paint94979
12-03-2012, 04:22 PM
Up and running

How does it sound?

Fingers
12-03-2012, 04:38 PM
Rattle rattle rattle..... :D

malibu795
12-03-2012, 04:43 PM
Only when below160ect

malibu795
12-04-2012, 05:14 PM
How does it sound?

idle once warm.. is between lly and lbz.. exhaust note.. couldnt tell you
sounds like a lbz/lly at idle little more turbo whistle

MarkBroviak
12-04-2012, 06:26 PM
Definitely get and oil temp gauge in it! Mine is running 180-220 degrees averaging just over 190degrees and I am 6K lbs 2wd, could only imagine what your actually seeing for oil temps. Your sound is probably not far off stock because of all the stock parts you are running. It takes big plumbing, turbo, cam, etc. to really change the tone of the motor.

hondarider552
12-04-2012, 06:31 PM
Adam, from what I have found.




Sustained higher RPM but low egt is harder on the oil than lower rpm(2200 and below) and higher EGT. I see you have gears and cruise at 2400rpm+. I wouldnt be surprised if you see 250*+ oil temps with a moderate load on the truck. I saw 274* in my LB7 towing 10,000 up a 6* grade for 8 miles at 55mph in 4th gear.


Oil temp gauges really opened my eyes in these trucks with temps. I value a oil temp gauge more than EGT. We only realize our trucks get hot when the engine fan comes on, well, what are the oil temps to drive the coolant temps up? You dont know untill you put a gauge in the truck, and I can promise you, your oil temps will always be higher than coolant temps while towing.

MarkBroviak
12-04-2012, 06:44 PM
Adam, from what I have found.




Sustained higher RPM but low egt is harder on the oil than lower rpm(2200 and below) and higher EGT. I see you have gears and cruise at 2400rpm+. I wouldnt be surprised if you see 250*+ oil temps with a moderate load on the truck. I saw 274* in my LB7 towing 10,000 up a 6* grade for 8 miles at 55mph in 4th gear.


Oil temp gauges really opened my eyes in these trucks with temps. I value a oil temp gauge more than EGT. We only realize our trucks get hot when the engine fan comes on, well, what are the oil temps to drive the coolant temps up? You dont know untill you put a gauge in the truck, and I can promise you, your oil temps will always be higher than coolant temps while towing.

X2, exactly right! I will be upgrading my oil cooling because I love higher rpms and oil temp climbs quick when you jump the rpms up for longer periods of time.

malibu795
12-04-2012, 07:00 PM
on this trip form ohio to wisconsin with a heavy load with by sail area plsu 20mph head winds.. im sure its high.. actually could watch the oil pressure drop when climbing a grade.. avg OP was 45psi are 2200-2300 with this load. caught it down to 38-40 on a grade same rpms full throttle.. backed off and OP came back up.. giving the charaterisitic that it beign heat related..

i rarely see ECT temps above 200*... fan will come completely on at 200* (hyd 2886 clutch.(more repsonsive then the stock lb7 i had). also keep in mind i dont have a bumper siting in front of the radiators like the regular trucks do.. means more airflow)

im thinking putting one of these on for my setup with a thermostatic bypass i dont think i need the 601
http://www.summitracing.com/parts/prm-301/overview/
4-14gpm flow rating
http://www.summitracing.com/parts/prm-501/overview/
4-16gpm
http://www.summitracing.com/parts/prm-601/overview/
4-18gpm

hondarider552
12-04-2012, 07:14 PM
I know with my oil cooler, with oil temps at 165*-180*, at 1800rpm im at 62psi. GM spec is 42psi @ 1800, so im well above that.

malibu795
12-04-2012, 07:23 PM
I know with my oil cooler, with oil temps at 165*-180*, at 1800rpm im at 62psi. GM spec is 42psi @ 1800, so im well above that.

useing the dash guage?

i got mine tapped into #3 main the ecm sensor is #4 main..

hondarider552
12-04-2012, 07:26 PM
Using my edge CTS, but the dash gauge is very close as well.

malibu795
12-04-2012, 07:35 PM
i have an autometer since i havent gotten a 6.5 oil pressure switch to route to my dash guage... yet

adeso
12-04-2012, 08:04 PM
I see 42 PSI at 1650 RPM, but my motor was built really lose (insert mom joke here). What oil are you running?
Superdiesel spec'ed out a really nice setup in his thread, I have been running his setup and have had 0 issues towing with triple oil cooled turbos

malibu795
12-04-2012, 08:08 PM
15w40 delo conventional.. its probably looser then stock.. new bearings but didnt turn the crank.. journals where all in spec..
i can swap my ect to oil easily if the t-tape doesnt keep then sensor from grounding

im head to columbus ohio tomorrow with a generator (~5500lb)

adeso
12-04-2012, 08:11 PM
I would run syn 5w40

malibu795
12-04-2012, 08:31 PM
i will run this for 10k then proably swap to syn..
how much does it cost per 10qts?
i run 10,000 miles every 5-6 weeks,
35.00 for delo 1300 from walmart plus a 10.00 B1441 oil filter
45.00 for an oil change.

that cost me ~4.5cpm

only thing i would be really sold on is if i could extend my service interval by min double..

i did that with my fuel filters... spent 100.00 in setup and it will last 60-75,000 miles and cost 37.00 in filters( 2 micron fuel and a f/w sep) per change vs the oem every 10-15k

cost to service life is something i have to take into effect..
with the oil cooler i want the cooler down streem of the filter... hot oil filters quicker better and smoother then cold oil. i dont think i can get that on a sandwich plate adapter..

LBZ
12-04-2012, 08:40 PM
Good to hear your back up and running Adam.
While on the topic of oil temps, what extra cooler kits are out there for extreme winter conditions? I want to go with something that won't make my oil too cold when it is -30 out-especially cold starts that might take longer for the oil to warm up.

adeso
12-04-2012, 08:41 PM
It does cost more, but if your temps are up some it will hold you over. I would see what your oil temps are doing, if they are high then run syn until you get a oil cooler on there. I'm really happy with the setup super diesel help me setup

adeso
12-04-2012, 08:42 PM
Good to hear your back up and running Adam.
While on the topic of oil temps, what extra cooler kits are out there for extreme winter conditions? I want to go with something that won't make my oil too cold when it is -30 out-especially cold starts that might take longer for the oil to warm up.

The two out there that I know of (killerbee and super diesel) use a Tstat and they stay closed (so normal stock system). I'm running mine up here in Minot ND

LBZ
12-04-2012, 08:52 PM
The two out there that I know of (killerbee and super diesel) use a Tstat and they stay closed (so normal stock system). I'm running mine up here in Minot ND

Thanks.
I would like to see the SD set-up. Wouldn't buy an O-ring from that Killerbee clown.
I went to SD's website and it looks like it's just one big site full of ad's and nothing that shows his products. Gonna have to do a search on here I guess and see what I can find.

malibu795
12-04-2012, 08:53 PM
this is what sledhead used modified by supper diesel
http://www.summitracing.com/parts/ear-503erl
(Opening starts at 160 degrees, fully open at 180 degrees)

my consern is goign too big and oil never gets warm enough and im lifting the pressure relief valve all the time in cold weather or dumping hot/cold oil in a cyclic fashion..which IMO is worse then just hot oil

adeso
12-04-2012, 09:21 PM
Thanks.
I would like to see the SD set-up. Wouldn't buy an O-ring from that Killerbee clown.
I went to SD's website and it looks like it's just one big site full of ad's and nothing that shows his products. Gonna have to do a search on here I guess and see what I can find.

I'm running SD kit now. You have to mount your own cooler but it is very simple fab skills. It is night and day from stock. Still need to watch that temp gage but so much better

malibu795
12-04-2012, 09:21 PM
how much did it drop your temp?

LBZ
12-04-2012, 09:28 PM
What does he do to modify them?
Porting them out?

adeso
12-04-2012, 09:30 PM
Well I'm running 3 oil cooled turbos so a whole different deal, but I could heat my oil up to 230 empty just playing with it. Now on the way up here at 60* outside (so not hot) and 26,700 CGVW and 63 mph (car hauler), it would just open the Tstat up at 190. On hot days I can get it up some but it really is night and day difference

adeso
12-04-2012, 09:34 PM
What does he do to modify them?
Porting them out?
Yes, he ports the sandwich plate for more flow, that is the only part you buy from him (at least when I did after he just started making them)
After the truck is warmed up I have noticed 0 loss in oil PSI

malibu795
12-04-2012, 09:35 PM
basic it pulls and arguable 100* out of the oil...

adeso
12-04-2012, 09:55 PM
If you are having issues with a stock turbo, this will take them all away. And it will only help with ECTs also

hondarider552
12-04-2012, 10:34 PM
basic it pulls and arguable 100* out of the oil...

Before cooler I saw a max of 274. After the cooler highest ive seen is 225. Havent.heard the engine fan kick on since putting the cooler on. So around a 50* drop