Duramax Diesels Forum Truck of the Week
  #16  
Old 06-17-2009, 12:48 PM
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Originally Posted by Subman View Post
He was thinking about running the crank and pistons from the LBZ with the LB7 heads, I was wrong when I said he wanted to use the LBZ heads.

I talked to him a little more this morning. He has an LB7 truck with what turns out to be a busted crank. He picked up an LBZ engine and tranny from a total that was in a fire. All the wires, injectors etc are toast so to speak on the LBZ. He's trying to do this on the cheap, after he told me this morning what he was wrong, I suggested getting a LB7 crank and forget all the LBZ stuff. I have to think you could get an LB7 crank pretty cheap.
Why not just take that burnt LBZ short block and bolt the LB7 heads on it?? Quick, easy (no need to rebalance or even pull the oil pans off), and gives him a stronger than stock-LB7 bottom end (except weaker pistons)...
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  #17  
Old 06-17-2009, 01:21 PM
radvans radvans is offline
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I think there is a keyed lb7 crank for sale in the market place now.
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  #18  
Old 06-17-2009, 04:24 PM
mainer mainer is offline
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ben has a crank for lb7 too
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  #19  
Old 06-17-2009, 05:48 PM
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Quote:
Originally Posted by mainer View Post
ben has a crank for lb7 too
yeah! Its cheap too, checked out by a machine shop.
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  #20  
Old 06-17-2009, 10:33 PM
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Thanks guys I'll let him know. I agree Ben, I thought that is what he wanted to do originally, bolt the lb7 heads and anything else he needed on to the LBZ block. Will let you know how it turns out. Ben if it comes to a crank what do you want for yours?
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  #21  
Old 06-17-2009, 10:41 PM
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Quote:
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Ben if it comes to a crank what do you want for yours?
http://www.duramaxdiesels.com/forum/...ad.php?t=14436
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  #22  
Old 06-18-2009, 09:10 AM
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Quote:
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yes found that thanks.
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  #23  
Old 03-08-2020, 03:45 PM
paulllyw paulllyw is offline
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Old thread, but I have a good lbz engine that needs head gaskets but need an engine for an lmm, can I swap over the lmm heads onto the lbz and be good to go in the LMM?
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  #24  
Old 03-08-2020, 04:50 PM
Blackmax123 Blackmax123 is offline
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no reason to swap the heads, as they're the same.
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  #25  
Old 03-08-2020, 05:22 PM
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I thought the injector bore was slightly different between the LBZ and LMM. LBZ injectors in an LMM would require larger O rings. Not sure on the other way around but would think it would still work
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  #26  
Old 03-08-2020, 05:32 PM
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LBZ/LMM same bore hole, and are slightly bigger than LLY. The LLY have a smooth body where the LBZ/LMM have a step around the body close to the middle of the injector body.
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  #27  
Old 03-08-2020, 05:34 PM
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Another way to identify just as a reference
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File Type: jpg 86E43665-FA09-4B66-9BA4-44E9AF627C08.jpg (63.6 KB, 30 views)
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