"It Lives"

JOHNBOY

JOHNBOY

< Rocking the Big Single!
Aug 30, 2006
2,159
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Saegertown, Pa
McRat said:
My thinking is that broken cranks are driveline related, not crankshaft strength per se.

Anything you can do to reduce shock to crank couldn't hurt.

Perhaps there might be a market for a rubber coupler/dampener.

Did you have an LB7 crank? Seems it most affects LB7's.
Click to expand...

LB7 crank. I already found several LLY cranks and I talked to Guy today about a billet crank.
 
JOHNBOY

JOHNBOY

< Rocking the Big Single!
Aug 30, 2006
2,159
0
0
Saegertown, Pa
I got the lower pan off it looks fine. No shavings, no chunks, no grit, just oil. The oil looked good and so did the filter. As best I can see everything looks good. I need to pull the engine to look further. I am really thinking the crank is broke.

This getting weirder. Everything I have checked so far has been good.
 
Fingers

Fingers

Village Idiot
Vendor/Sponsor
Apr 1, 2008
1,715
86
48
White Oak, PA
Sounded like a single cylinder, what ever the issue. Sounded like when I dropped a rod in a gasser. Valve?

You will know soon enough I am afraid. Let me know if you need/want a hand. I'll drive up.
 
jneal

jneal

New member
Feb 12, 2008
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Bloomington, Indiana
Johnboy, from my experience with a broken cranks, (and I've seen alot) sometimes they break and leave all kinds trash, chunks and debris in the pan. Yet I have seen some that visually you can see anything unitl you have disengage the clutch (but that's on a semi with pull style clutches). Have you tried putting it in gear and have someone bar the engine over with the damper bolt so you can try and see movement or lack of it in the crankshaft? I seen the video and it sounded "deep", but of couse that's a video and not in person. I have had injectors cause fuel knock that make the engine sound like it's about to come apart. Are your 80% over injectors the original nozzles honed out? If so I'd think there is a real good change that it cracked a tip due to the loss of material and increase rail pressure via the CP3X2. A cracked tip would cause horrible fuel knock. Just giving you some ideas from past experience. I hope it is an injector and not the crank for your sake. Good luck.
 
JOHNBOY

JOHNBOY

< Rocking the Big Single!
Aug 30, 2006
2,159
0
0
Saegertown, Pa
UPS DRVR said:
John let me know if you need me to come over.
Click to expand...
Thanks for all your help Sean!:cool:


jneal said:
Johnboy, from my experience with a broken cranks, (and I've seen alot) sometimes they break and leave all kinds trash, chunks and debris in the pan. Yet I have seen some that visually you can see anything unitl you have disengage the clutch (but that's on a semi with pull style clutches). Have you tried putting it in gear and have someone bar the engine over with the damper bolt so you can try and see movement or lack of it in the crankshaft? I seen the video and it sounded "deep", but of couse that's a video and not in person. I have had injectors cause fuel knock that make the engine sound like it's about to come apart. Are your 80% over injectors the original nozzles honed out? If so I'd think there is a real good change that it cracked a tip due to the loss of material and increase rail pressure via the CP3X2. A cracked tip would cause horrible fuel knock. Just giving you some ideas from past experience. I hope it is an injector and not the crank for your sake. Good luck.
Click to expand...

Sean and I decided to just pull the engine out. We got the trans out and are basicly ready to pull the engine. What ever is wrong is "deep". :( I checked for a messed up injector yesterday. I found nothing. I already had one hang up. But interestingly enough the side that the knock comes from appears to be the passenger side. The injector I hung was a drivers side injector. I at first thought I broke piston because off a hung injector, but I had no blow by like I have seen from others that broke pistons.

I am going to tear the engine down completely. At this point I have no real choice. The way I see it I either spun a rod bearing or broke the crank.

Thanks for all your thoughts they really do help!:cool2:
 
JOHNBOY

JOHNBOY

< Rocking the Big Single!
Aug 30, 2006
2,159
0
0
Saegertown, Pa
Thanks guys. :)

Sean (UPS DRVR) and I got the engine out. We tryed to put it back on the stand but had a bolt break and mess up the adapter plate and cut up my finger. The engine ended up on the floor.:( It went down gentlely. We got it back up right and called it a night. We will tear into into tomorrow.
 
McRat

McRat

Diesel Hotrodder
Aug 2, 2006
11,249
26
38
64
Norco CA
www.mcratracing.com
JOHNBOY said:
Thanks guys. :)

Sean (UPS DRVR) and I got the engine out. We tryed to put it back on the stand but had a bolt break and mess up the adapter plate and cut up my finger. The engine ended up on the floor.:( It went down gentlely. We got it back up right and called it a night. We will tear into into tomorrow.
Click to expand...

When my guys move heavy stuff, the first thing out of my mouth is:

"If this starts to fall GET THE FK OUT OF IT'S WAY"

Hope yourf hand is OK.
 
02freighttrain

02freighttrain

Team Salad Bartender
Aug 13, 2006
911
0
0
sootville, Fl
If my motor is falling, I normally push someone underneath it to cushion the fall:D J/K Hope the cut's not too bad....... Soak it in diesel fuel, it will heal faster.
McRat said:
When my guys move heavy stuff, the first thing out of my mouth is:

"If this starts to fall GET THE FK OUT OF IT'S WAY"

Hope yourf hand is OK.
Click to expand...
 
sweetdiesel

sweetdiesel

That's better
Aug 6, 2006
10,390
0
0
52
Thailand
02freighttrain said:
If my motor is falling, I normally push someone underneath it to cushion the fall:D J/K Hope the cut's not too bad....... Soak it in diesel fuel, it will heal faster.
Click to expand...

:rofl: I was thinking the same thing

serously John glad it didnt come crashing down and I hope things are going to work out better for ya from now on
 
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