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  1. H

    LML Callies Durastar Crankshaft Issues??

    I am in the process of putting a new engine together now with the Callies Durastar Crankshaft. Now I’m worried and just can’t seam to win with the crankshaft issues on the Duramax without buying the billet $4000 dollar version. They all break until you get to the L5P. I hate to say it, but the...
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    LMM: Rotating assembly ?

    Yep, I see it. Thanks. Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    Does anyone know if the pistons in the above post need to be delipped ? Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    The pistons have been chosen: Mahle Motorsports Part number #930036075 Cast 0.020 over No valve reliefs No bushings 16.8 compression ratio Coated skirt Thanks for all the help. Hopefully I can crank out 425 trouble free horsepower for the next 200,000 miles. Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    Yes I did realize they are one in the same pistons “Motorsports and Race”. The link you sent clears it up thanks ! I was quoted a difference of $600 dollars going from the Clevite Cast to The Motorsports Cast. Does that seem right ? One question I keep asking that has never been answered is...
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    LMM: Rotating assembly ?

    Okay, great information. Is there a Mahle Race cast piston without the valve reliefs and are they stronger than the Clevite Cast ? Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    Are they actually stronger than the Clevite Cast ? If so what makes them that way ? Sorry for all the questions. What I think I want is replacements that are dimensionally the same as my LMM pistons without the bushings and 0.020 over. This is why I keep comparing them to the clevite cast...
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    LMM: Rotating assembly ?

    Don’t those part numbers have valve reliefs and also .010 shorter to allow for block decking ? Will that effect my milage and cold starts ? Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    All I want is to pull my camper again and not crack another piston running the same mild tow tune like I did for the last 3 years. Fuel mileage and a long life is also important to me. I spoke to the guys at Mahle and they feel like the clevite cast pistons will be fine for what I’m doing...
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    LMM: Rotating assembly ?

    I have been doing a little research on the Mahle pistons and here is my conclusion. Mahle Clevite Cast; Similar to an LB7 No coating Stock height Mahle Race Cast; 10 thousandths shorter to allow for decking the block Coated skirts Valve reliefs I don’t think there are any other differences...
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    LMM: Rotating assembly ?

    Yes, a cylinder was damaged. The cracked piston was really clean compared to the others and the pattern may be a little different. I think this is because I drove the truck 2 more miles to get off the interstate and it was up hill all the way. I’m going to have all of the injectors checked just...
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    LMM: Machine shops in Louisville / Lexington Ky Area

    Okay, I checked with Smith automotive and they can do it but don’t have a torque plate for honing / boring. I ended up making the drive to Wagler for the bottom end machining. Austin gave us a shop tour. It was awesome !!! Sent from my iPhone using Tapatalk
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    LMM: Machine shops in Louisville / Lexington Ky Area

    Yeah, If I can’t find anything closer my plan is to drive 3 hours up to Waglers. Sent from my iPhone using Tapatalk
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    LMM: Machine shops in Louisville / Lexington Ky Area

    I am looking for a machine shop in my area that knows Duramax. I need my block bored .020 over and my rotating assembly balanced. Any suggestions are appreciated. Thanks. Sent from my iPad using Tapatalk
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    LMM: Rotating assembly ?

    What does a good spray pattern look like ? Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    It is just a light tow tune and ran with it for a long time, at least 50,000 miles. A bad or worn injector makes more sense to me. I had to drive the truck approximately 2 miles after the failure to get off the interstate highway in the North Carolina mountains which may have affected the...
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    LMM: Rotating assembly ?

    It has the typical crack that I see all over the internet. I Don’t think it is tuning as it has been on the same tune pulling the same camper for 3 years. Could be a bad injector and I plan on having those tested. I am from Kentucky. Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    Why do I need new LMM rods ? Can I just reuse mine ? Sent from my iPhone using Tapatalk
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    LMM: Rotating assembly ?

    Okay, I need a little help selecting parts. I have an 08 LMM with 140,000 miles and a cracked piston. I am in the process of rebuilding it and I just want to reliably tow my camper again while making 400 to 425hp. I have towed the same camper all over the Southern US for the past 3 years trouble...
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    LMM: LB7 block compatible with LMM ?

    Thanks everyone, I appreciate the help. Sent from my iPhone using Tapatalk
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