Duramax broken crank

Fluidamper has broken several cranks in DURAMAX's, they're too heavy (11lbs heavier than stock iirc), but the ones built in the last couple of years are supposed to be better. Unfortunately this is far to common on LML's than it should be. Seems 11-13 had a pretty high rate of failure at 150k+ miles. It's a crap shoot when the break occurs and ...

Duramax broken crank. Outside of being a doctor, nurse, EMT, or holding any sort of position in the medical field right now, TEACHERS have it the hardest during a pandemic. I mean for... Edit Your Post ...

2006 Chevy Duramax LBZ CCSB, LT3, MBRP 4 inch exhaust, AFE intake Stage 2, suncoast V, Edge juice w/***, gauges, EGR blocked, 6-inch lift, H2's w/ BFg AT 35's for the winter ... After a broken crank, you can do a replacement in the same block, but you will have to have the main journals line-honed or possibly line-bored to be sure …

Truck had a broken crankshaft. Replaced crankshaft. Does crankshaft position need to be relearned? I know it does on some GM vehicles. Truck runs and drives but has p02CD cylinder 1 injector exceeded limits and p02D3 cylinder 4 injector exceeded limits. ... Duramaxdiesels.com was founded in 2006 and created a site which houses …OR REPAIR THIS ONE with 10k miles or less on it:help. 2015.5 GMC 2500 HD 6.6L Duramax-AIRDOG2 165, FLOW PRO 5" DOWN PIPE BACK W/ MUFFLER, S&B CAI, CTS2 INSIGHT, PELA Motorsports & PPEI KW TUNED :gearjamin , Built Trans, Billet TC, Billet Input Shaft. WWW.OTHERS-ELECTRIC.COM. WWW.BAMAOFFROAD.COM.26 Mar 2023 ... Not a big surprise for Land Rover drivers: The crankshaft snapped after only 64000 km (40000 Miles) on the SDV6 3.0L Diesel.Feb 26, 2024 ... Broken Again.... Powerstroke Life · L5P DURMAX BOLT ON POWER! · 6.7L 1500HP CUMMINS Parts · Why Did We Build This? · Trevor LMM LLY LML...Is this a broken crank? Just installed a new CP3 and SAC 45s. Tuned it yesterday with EFI Live for the SAC injectors. Typical 0-90hp DSP5 tuning, not mine, the tuning came from a reputable source. 270k …Jun 18, 2023. #1. 2016 LML duramax, cp3 swapped (before rebuild all tuning is for cp3 swap), fass 165, installed Mahle performance pistons and rings, I’ve bled all the air you can possibly think. Maybe there’s more left. I’m between 430-450psi in all cylinders as well, did a manual compression test after completing the rebuild.I doubt the crank is broken. You would still have oil pressure. If you have a scanner pull up the cam and crank sensor/signal and see if you’re getting a reading. If you’ve got a broken crank and you lose those readings, it can cause a no start. actual fuel pressure reads like 5psi while cranking.After consulting with many folks who work on Duramaxes that seems to be the only common issue with broken cranks is the possibility that the balancer has gone bad. ... but nothing seems applicable for 2007.5-2010 6.6 Duramax's. Not sure if cross platforming started happening. The years also add up to the UAW strike in that time …

Aug 23, 2021 ... Www.ecodieselusa.com Scoping the insides of the oil galleys of two engines that both had broke crank shafts. Check out the results.If you’ve ever experienced the frustration of turning the key in your car’s ignition only to hear the engine crank but not start, you’re not alone. This common issue can leave car ...Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 06-07 LBZ & LLY Performance Parts Discussion. Broke Crankshaft on LBZ. Jump to Latest Follow ... Harley had his crank broke by getting backlashed too. A dyno operator backlashed the crank at a dyno/sledpull event, by letting off at high rpm and nailing the dyno and truck brakes at …Pull the pan, theres a good chance that hit marred the main bearings when the crank slammed forward. 2008 2500HD LTZ, EFI Live- Idaho Rob's Tunes, 4" Magnaflow Turbo Back, Raptor 150 Lift Pump, Transgo Jr, All Season Diesel EGR delete with high flow Y-bridge, Edge Insight for gauges,I've been able to find videos showing a very loud knocking sound, but as far as symptoms of a broken crank goes, I've found …May 8, 2013 · Yeah, it's a 3500 and the customer told us afterwards he put the parts on for his towing and fuel mileage. It's just shit luck like all the other cranks that have broken in the past. This one looks to have broken at the back though, because I can rotate the flywheel about 1" without turning the engine 15991 posts · Joined 2008. #2 · Jul 24, 2013. On the crankshaft there are two pins used for locating the damper and reluctor wheel. The pins can sheer off either resulting in loss of accesory drive or if its the reluctor, loss of oil pressure. When you build a duramax, you cut key ways into the snout and insert key stock to hold the damper ...

Duramax Engine LLY 2004.5 to 2005. In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the …10666 posts · Joined 2009. #5 · Oct 26, 2023. Engine Vibration • Fluidampr - Manufacturer of Performance Dampers For Gas & Diesel Engines. Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different. 2008 Silverado LT, Crew Cab, 2WD,LB.What happened is he drove it through a huge ass puddle and hydrolocked the engine. To everyone else who responded in this thread: cleaning the battery cables isnt going to fix this because its not the problem to begin with. The batteries are fine. I guarantee it. Pull the glow plugs and try to crank the engine.LML broken crank bolt while idling. Hey everyone first time post forgive me if I've posted in the wrong area, working on my 2011 LML just did a water pump replacement all went well, torqued crank bolt to 275 ft lb using a brand new crank bolt from gm idled truck for 20 mins to check for leaks all was well.Bought a lbz zf6 170k miles. Runs and drives very well untill you start getting on it. When get on it it will throw a code for p0606 and goes into limp mode. Drove it couple other times the. Finally threw a p0336 code to go start looking at crank sensor issue. I’ve ohmed harness from crank sensor to computer and no open loops. A little back ...

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Not sure about Duramax, but BBC should have forward thrust load applied to the crank flange (say 100 lbs) with 1/2 thrust load (say 50 lbs) applied rearward to the main thrust cap prior to and during initial tightening of the main thrust cap fasteners. The thrust loads used during assembly are arbitrary and do not need to simulate running loads.This switch is located in the suction side of the fuel system and it may induce a crank no start, hard start, or an extended crank. Note: The Chevrolet Express and GMC Savana vans utilize a Fuel Conditioning Module with an electric priming pump. The filter minder switch will have to be inspected with the electric prime pump running. See more. 1.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Outside of being a doctor, nurse, EMT, or holding any sort of position in the medical field right now, TEACHERS have it the hardest during a pandemic. I mean for... Edit Your Post ...

Aug 22, 2023 ... How to Identify a Broken Crankshaft: Chevy Duramax. Thoroughbred ... Broken crank sound. Grant Crowell•158K views · 22:36 · Go to channel · It...Find out how to repair the damage from a large limb that has split off the trunk of a Bradford pear tree, and how to prevent it from happening again. Expert Advice On Improving You...Mar 29, 2009 · If you have a pin shear off. (you will know it immediately). Do not drive the truck. Shut it off as soon as possible. Have it towed. Continuing to drive the truck wil allow the balancer to slip on the crank and it can play hell on the nose of the crank and the inside of the balancer. Mar 30, 2023 · May 4, 2020. #1,241. Several billet cranks broke at the limited pro stock power level this past pulling season. This is an assumption, but given the caliber of the builds, it's a safe bet they were narrow rod, internal balance, and/ or at very least, AF cams. Talking 1300-1400 hp. Sent from my SM-G960U using Tapatalk. We would like to show you a description here but the site won’t allow us.2011 Chev 2500 LML 86k miles Deleted in 2015. Running great until last week.. went to start and all crank no start. no DIC errors. Here's what I've done so far: Research on this site lol. Added 5 gal of diesel to tank (even though I'm at 40% full on the gauge) Swapped my FASS fuel/water filters. Primed stock fuel filter before and during …LML no crank, no codes, ran fine yesterday. 2011 LML, 65k miles. Drove it to work and back yesterday with no problems. Parked overnight, plugged in, overnight low was only 30 degrees so not too cold. Tried to start it this morning, turn the key and nothing. Batteries are fine, I put a multimeter on while turning the key and they never budged ...mike diesel. If i remember right, there all the same cranks...in my personal opinion, the reason why we dont see as many broken cranks in lly's is simply because more people own lbz's and lb7's. Let me rephrase it a little..more people mod lbz's and lb7's. People tend to look at lly's (for some stupid reason) as if they are the ugly red headed ...Spools & 38-Spline Pulling/Drag Racing Axle Shafts. Billet Engine Plates, Sled Pulling Performance Upgrades, Allison Trans Blankets, PCV Reroute Kits, High Flow Intake Manifolds 2001-2010 Duramax Diesel. Up to 150% more airflow and over 40 HP gain. Eight time TTPA points champ 2006 to 2013.Just wondering if anybody has had any luck just replacing the broken crank with a new one without completely tearing down the whole engine and having the …

Duramax 6.6 Technical. Duramax Hard Parts. Ok guys, I tore my engine down this morning, I took pics but haven't had time to load them, My crank is broken at …

It's still uck of the draw. Theres HUNDREDS of broken DURAMAX cranks from guys running aftermarket balancers on engine with cirtually no run time. LML's seem to pop around the 150-200K mile mark, others are a gamble. As to harmonics, these same harmonics are present in engines running ATI balancers, it's just a natural harmonic in the engine.36. SLC, Utah. Nov 8, 2015. #17. Broke mine in with delo 400 15w40 and still continue to use delo 400. Drove normally for 200 miles, then changed it. Started driving semi aggresive for another 150 miles, changed it again then started using the truck for its intended purposes. 82 psi boost with zero blow by.2011 Chev 2500 LML 86k miles Deleted in 2015. Running great until last week.. went to start and all crank no start. no DIC errors. Here's what I've done so far: Research on this site lol. Added 5 gal of diesel to tank (even though I'm at 40% full on the gauge) Swapped my FASS fuel/water filters. Primed stock fuel filter before and during …Oct 7, 2012 ... keyed crankshaft for Duramax- Dirtys House of Diesel. 16K views · 11 ... Duramax with broken crank | Brunt Boots Review. BoughtToBuild•780 ...If you’ve ever experienced the frustration of turning the key in your car’s ignition, only to have it crank without starting, you’re not alone. This issue, commonly referred to as ...broken crank. Jump to Latest Follow. 5K views 20 replies 7 participants last post by SilverGorillaLML Jan 21, 2016. tracygto Discussion starter. 117 posts · Joined …Apr 19, 2023 ... Completely overlooked this issue and now I feel like an idiot...but I wont make that mistake again! If you've tried everything and the truck ...Sep 15, 2023 · Had an LB7 that i built an engine for back in 2016, and broke the (LBZ) crank in 2018. Ran perfect with no noise until about 2200rpm and then would stumble and spit and shake. Best ways to check are rotating by balancer bolt while watching for flywheel movement, or checking for up/down/side movement of the front of the crankshaft If you’ve ever experienced the frustration of turning the key in your car’s ignition only to hear the engine crank but not start, you’re not alone. This common issue can leave car ...Jul 6, 2010 · 1633 posts · Joined 2009. #1 · Jul 6, 2010. I broke the Crankshaft on my LBZ. Just wondering peoples opions on what to put in it when rebuild it. And i do know about Socal so dont suggest that lol. $10,000 or under budget. 2006 LBZ. ATS Stage 2 W/ Co-Pilot. EFI Live. 5" diamond eye. Keys. Tierod Sleeves. CenterLink.

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CHAD REMAKEL: The main reason for modifying the Duramax firing order with the camshaft is to relieve stress on the front portion of the crankshaft in higher performance applications. The factory firing is 1-2-7-8-4-5-6-3, but this new camshaft design changes that to 1-5-6-3-4-2-7-8. Changing an engine’s firing order isn’t a new science, as ...85. 28. Mar 31, 2021. #1. Well I got 27,000 miles out of my longblock from XCalibur Diesel. I found out today the crank is broke.. So that's $6,000 down the tubes plus the $2,000 to have the engines swapped out. Im pretty sick right now.28. Massachusetts. May 15, 2023. #1. A friend of mine got this complete Lbz with a broken crank for a steal. Upon teardown, we found the crank broken at the 7/8 rod throw. Never saw one break here. Usually , they're broken towards the front of the block. Going to tear it down the rest of the way and check the main journals.We would like to show you a description here but the site won’t allow us.28. Massachusetts. May 15, 2023. #1. A friend of mine got this complete Lbz with a broken crank for a steal. Upon teardown, we found the crank broken at the 7/8 rod throw. Never saw one break here. Usually , they're broken towards the front of the block. Going to tear it down the rest of the way and check the main journals.Jun 18, 2019 · L. Lp5duramaxtow Discussion starter. 48 posts · Joined 2016. #1 ·Jun 18, 2019. Hey guys and gals! Been awhile since I have posted on this forum, Well long story short I have had nothing but a nightmare of a time with this 2017 Gmc Denali L5P I have the issues with the dash and radio freezing and Just turning off completely... New LP5 owner first 2017 GMC Denali Duramax. ... Danville Stage2R68mm,PPE Duel Fuelers 45 Over injectors,16-1 .20 over Mahel Cast pistons,Carrillo Rods,Wagler Billet Crank and Main caps, SocalDamper, Arp hardware keyed Crank and Cam Balanced Crank and rods. Merchant motor and transfer case …Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Duramax Powertrain broken crank. 4020 Views 20 ... tracygto Discussion Starter · Jan 21, 2016. Add to quote; Share Only show this user. I have just broke a crank in my 08 LMM and I am wondering if they make a kit so I can put a cummins in it. I just took alot of precautions to …916 posts · Joined 2006. #6 · Feb 2, 2010. Lbz. My'07 is an LBZ My Customer's '08 is the LMM with a new style 2 piece crankshaft. '92 K3500 Dually 6.5 fuel plus 20% JD TO4 turbo 3'' down & 3.5'' ex 5 speed. 07' Duramax Dually Quadzilla Programmer at 70HPfor now. 87' 6.2 K10 banks hairdryer plus 50% fuel (Dailly driver) ….

LB7 Duramax 2004. Broke the crank while towing. Here’s what it sounds like. Motor entirely rebuilt by DFC Diesel less than 60,000 miles ago. LB7 Duramax 2004. Broke the crank while towing.Jan 21, 2016 · Got a new crank, keyed it. Not that you did anything wrong. Plenty of builders reuse that stuff. I agree with Jaime more of those are popping up that reused the crank in a new build. There was a thread on dd like a month ago about it iirc, maybe longer. Sorry about your bad luck. Empire repair kit. Empire Performance EPE-CRKPINKIT Crank Shaft Pin Kit. As you can see it's a 1/4". Crankshaft Balancer Bolt. 1st Step 74 lb ft. 2nd Step 105 degrees. Some people key there's but that's for over 700 hp and you have to pull the motor for this. 07 Chevy Classic 2500HD 4x4 2LT LBZ CC/SB White.Nov 28, 2014 · I've got 3 LB7/LLY broken cranks here. They all do it, but the LB7/LLY cranks have a little more weight to them so they are preferred if you're building the motor. Not sure if it makes a difference which crank you have, I did go with a used LLY crank that was mag tested in my LMM though. :help Friend has 09 GMC LMM Allison stealership says crank is broken. $10,000 to fix. 175,000 miles. He says coming down big hill with turbo-brake on. Stepped on the brakes and trans shifted to low pegging the tach. Any ideas on a cheaper fix. Motor still runs but hammers to beat the band.Merchandisehttps://dirtydiamonddiesel.com/Thanks for tuning in we hope you guys and gals enjoy the video, be sure to follow us on social media platforms!Supp...Oct 7, 2009. #3. Depending on how much power your going to lean on it with. I would make sure you have about .0028-.003 clearance in the main bearings too. I believe under the added stress, it's helping the crank flex a little, squishing out the oil jacket and then it makes contact with the bearing (caused my spun bearing I believe because I ...In this episode of XDP Tech Tips, we talk with our tech expert Mike to find out everything we need to know on what the XDP Duramax Crankshaft Pin Kit does, h... Duramax broken crank, About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ... , Just wondering if anybody has had any luck just replacing the broken crank with a new one without completely tearing down the whole engine and having the rotating assembly spin balanced? My lml broke a crank shaft last Saturday night., 11 Jan 2018 ... ... Duramax engine. The engine used in this video is an LB7 engine but is relatively the same to newer versions of the duramax ... Broken "Compression ..., DING, DING, DING, WE HAVE A WINNER! BIG DIPPER -i think the same way as you do on this. problem is _____ comes to the masses with this idea that injectors caused this crank breakage and because of this, send _____ all your injectors and everthing will be "right" when you get them back, because they have a pc of paper that comes back with them saying everthing is fine, but it wont state that ..., Aug 26, 2014 · That's crazy that many have broken. I've only seen one and haven't heard about any until now. Sent from AutoGuide.com Free App. GM diesel mechanic Panama City, Florida. 1994 Chevy S10 lowered 7/9 with 215/35R18 (yes a 215/35 haha) 4.3 TBI motor with 700R4 swap, 2000 S10 front conversion, LED lights all the way around, HIDs low and high beam ... , If you have a pin shear off. (you will know it immediately). Do not drive the truck. Shut it off as soon as possible. Have it towed. Continuing to drive the truck wil allow the balancer to slip on the crank and it can play hell on the nose of the crank and the inside of the balancer., The oil pan would have to be dropped to confirm the broken crank. If you are getting codes for injectors I would start inspecting that issue and also look at the injector harness also. 1996 K3500 6.5L, ( "F" Eng #141 cast block) NV4500, crewcab, dually,Diamond Eye 4" Turbo Back Exhaust w/2.5" Flo-Pro Crossover, AirDog II DF165 w/ tank sock ..., Feb 26, 2024 ... Broken Again.... Powerstroke Life · L5P DURMAX BOLT ON POWER! · 6.7L 1500HP CUMMINS Parts · Why Did We Build This? · Trevor LMM LLY LML..., Fluidamper has broken several cranks in DURAMAX's, they're too heavy(11lbs heavier than stock iirc), but the ones built in the last couple of years are …, We would like to show you a description here but the site won’t allow us. , Is this a broken crank? Jump to Latest Follow 61 - 80 of 81 Posts. 1 4 of 5 Go to page. Go. 5. DMAXfirefighter · Former GM Tech and parts. Joined Jan 20, 2009 · 5,221 Posts #61 ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 207.6K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners …, May 4, 2020. #1,241. Several billet cranks broke at the limited pro stock power level this past pulling season. This is an assumption, but given the caliber of the builds, it's a safe bet they were narrow rod, internal balance, and/ or at very least, AF cams. Talking 1300-1400 hp. Sent from my SM-G960U using Tapatalk., Pull the pan, theres a good chance that hit marred the main bearings when the crank slammed forward. 2008 2500HD LTZ, EFI Live- Idaho Rob's Tunes, 4" Magnaflow Turbo Back, Raptor 150 Lift Pump, Transgo Jr, All Season Diesel EGR delete with high flow Y-bridge, Edge Insight for gauges,, Not sure about Duramax, but BBC should have forward thrust load applied to the crank flange (say 100 lbs) with 1/2 thrust load (say 50 lbs) applied rearward to the main thrust cap prior to and during initial tightening of the main thrust cap fasteners. The thrust loads used during assembly are arbitrary and do not need to simulate running loads., About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ..., Jan 21, 2016 · Got a new crank, keyed it. Not that you did anything wrong. Plenty of builders reuse that stuff. I agree with Jaime more of those are popping up that reused the crank in a new build. There was a thread on dd like a month ago about it iirc, maybe longer. Sorry about your bad luck. , Aug 26, 2014 · That's crazy that many have broken. I've only seen one and haven't heard about any until now. Sent from AutoGuide.com Free App. GM diesel mechanic Panama City, Florida. 1994 Chevy S10 lowered 7/9 with 215/35R18 (yes a 215/35 haha) 4.3 TBI motor with 700R4 swap, 2000 S10 front conversion, LED lights all the way around, HIDs low and high beam ... , The duramax engine has a long history of breaking cranks at that location. This is so much of a common issue that people have created cam shafts with altered firing orders to try to remove the stress from that point on the crank. Plenty of stock trucks have broken cranks like this., The duramax engine has a long history of breaking cranks at that location. This is so much of a common issue that people have created cam shafts with altered firing orders to try to remove the stress from that point on the crank. Plenty of stock trucks have broken cranks like this., Nov 26, 2018 · Broken cranks seem to be a very rare problem for Duramax's. People would need to have some fairly sophisticated equipment on a running engine to track how harmonics from the camshaft would eventually result in damage to the crank. , After consulting with many folks who work on Duramaxes that seems to be the only common issue with broken cranks is the possibility that the balancer has gone bad. ... but nothing seems applicable for 2007.5-2010 6.6 Duramax's. Not sure if cross platforming started happening. The years also add up to the UAW strike in that time …, 136k Miles, and yes cranks like normal. Chevy Mechanic: Vince S. If you were to pinch off the hose from the filter assembly to the injector pump will it hold pressure. If it holds i woukd then loosen the steel line from the pump to the fuel rail and see does any metal come out of it., 2009 LMM Broken Crank! Hello and Thank you for having me here at DieselPlace! I've been looking around here for a while now and have gotten some very good information from the members here! I work as a mechanic for a small business and have many Duramax engines that I service here. My problem at this point is 2009 Chevy …, This switch is located in the suction side of the fuel system and it may induce a crank no start, hard start, or an extended crank. Note: The Chevrolet Express and GMC Savana vans utilize a Fuel Conditioning Module with an electric priming pump. The filter minder switch will have to be inspected with the electric prime pump running. See more. 1., About 2 weeks ago on the way to work the truck started bucking violently and died. Pulled codes and got p0366 crank sensor. Took it to a mechanic I know and he replaced crank sensor. It still throws the code after clearing it when cranking. We are getting power and signal from both the crank and cam sensor. The reluctor wheel is tight., 1633 posts · Joined 2009. #1 · Jul 6, 2010. I broke the Crankshaft on my LBZ. Just wondering peoples opions on what to put in it when rebuild it. And i do know about Socal so dont suggest that lol. $10,000 or under budget. 2006 LBZ. ATS Stage 2 W/ Co-Pilot. EFI Live. 5" diamond eye. Keys. Tierod Sleeves. CenterLink., I got a 2011 duramax that I make a living with an now I've got a broken crank . From reading some apparently they are having crank problems.anybody give me some insight ., What did you torque the bolt to, some say in the range of 275 lb ft, SoCal has it listed as. Crankshaft Balancer Bolt. 1st Step 74 lb ft. 2nd Step 105 degrees. SoCal Diesel - LLY Duramax Torque Specs. Let me know when your done with XDP alignment tool/kit as I may be interested in purchasing it after your done... ~ Mike H ~ ., Apr 1, 2021 · 85. 28. Mar 31, 2021. #1. Well I got 27,000 miles out of my longblock from XCalibur Diesel. I found out today the crank is broke.. So that's $6,000 down the tubes plus the $2,000 to have the engines swapped out. Im pretty sick right now. , Jan 9, 2019 · 43. Galt, Ca 95632. Jan 9, 2019. #5. The pic shows the reluctor wheel hub and oil pump gear misaligned with the crank. That pin broke for sure. Once you remove that hub then you can see the cam gear and pin. It might be fine, and your issue is just the hub in front of it. You should be able to pull that off with a puller. , Aug 23, 2009 · Aug 23, 2009. #1. Got the motor out and found the second from the front Main bearing spun pretty good. The bearing was pretty well chawed up. Way undersize at this point. The main cap and block journal seem ok (going to check out of round on the crank and main). This was noticed at first at very low RPMs (about 1200) when I first started to ... , I think doing an entire L5P swap would be better that way you benefit from better flowing heads. Run the L5P injectors with the LBZ ecm just run an external reluctor wheel for the crank sensor if the tooth count on the L5P wheel is …, Nov 28, 2014 · I've got 3 LB7/LLY broken cranks here. They all do it, but the LB7/LLY cranks have a little more weight to them so they are preferred if you're building the motor. Not sure if it makes a difference which crank you have, I did go with a used LLY crank that was mag tested in my LMM though.