LMM: Well it finallly blew, and Now it Runs!

05smoker

I'm officially done!
Mar 30, 2007
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Sorry to hear the news Tommy. Love your attitude towards it though!:D When my brother's LB7 let go a few years ago, it windowed the block. Glad to hear yours didn't do the same.

Check with Burkhart or Danville for shortblocks.

Ed
 

vortecfcar

No longer a member
Jun 28, 2007
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Looks like it let go on the 4-5 shift.. :physchic:

I'm not sold on a cracked piston yet. I wonder if it's not the turbo... bad seal? locked up compressor?

Nick
 
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McRat

Diesel Hotrodder
Aug 2, 2006
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Norco CA
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When running VNT turbos, the RPM sensor in the turbo will sometimes fail causing similiar symptoms. Call Steve at TTSPowerSystems and ask him for a new sensor so you can eliminate that possibility.
 

slowlmm

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Mar 2, 2008
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Looks like it let go on the 4-5 shift.. :physchic:

I'm not sold on a cracked piston yet. I wonder if it's not the turbo... bad seal? locked up compressor?

Nick

I wonder the same thing now after our convo ill look into wht we discussed and see and pray thts it. Any one else find it strange tht my balance rates are almost within in norm and it dosent spew oil or smoke out the pcv :confused: any other ideas before we tear it apart
 

slowlmm

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Mar 2, 2008
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Don't run it anymore than you have to. If a piston just cracked, the block is often AOK. If you drive on it, you buy a new block.

yea just ran it to get in the trailer 4low crawled on at idle and to check the rates last night :)
 

slowlmm

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Mar 2, 2008
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When running VNT turbos, the RPM sensor in the turbo will sometimes fail causing similiar symptoms. Call Steve at TTSPowerSystems and ask him for a new sensor so you can eliminate that possibility.

lol hmm well im going to his house for a bbq this weekend to tear my motor down so ill ask him :D
 

McRat

Diesel Hotrodder
Aug 2, 2006
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yea just ran it to get in the trailer 4low crawled on at idle and to check the rates last night :)

Harbor Freight has a cheap diesel comp tester that includes the right tip IIRC. It works better than my expensive one.

Pull all 8 glow plugs, put a battery charger on, disconnect glow plug module, then crank 5 revs and record. A cracked piston is going to show very little. All cyls should be within 50 lbs of each other before you panic.
 

slowlmm

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Mar 2, 2008
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Harbor Freight has a cheap diesel comp tester that includes the right tip IIRC. It works better than my expensive one.

Pull all 8 glow plugs, put a battery charger on, disconnect glow plug module, then crank 5 revs and record. A cracked piston is going to show very little. All cyls should be within 50 lbs of each other before you panic.

ok cooool ill check tht out as well . and see well lets hope tht i can put off a build a little longer :)
 

slowlmm

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Mar 2, 2008
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Say hello to his missus for me. She has the best fried chicken!

Tell him to give you the McRat Special price on the turbo sensor.

LOL hmmm sounds tempting mcrat specail priceing hugh should i wear a helmet and pads when i ask for it :D
 

Gasuout

Johnny
Mar 20, 2008
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Santa Ana , Ca.
Maybe its not a piston , and you broke a turbo . Been there . Sounds bad when you break a turbo shaft .

Injector balance should be max high on bad cylinder .

Is it thumping like mine did ? Sound of a completely dead hole .