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Holysmokes 11-11-2007, 09:50 AM Im curious as to what years / generation have the best dmax to date. Im a Cummins owner right now and am doing some research. Anything to stear clear of? What years are known for injector issues? Any other issues? Thanks. Smokes JoshH 11-11-2007, 10:36 AM It depends on what your plans are for it. If you are going to leave it stock or just add a tuner then I would say an LBZ would be your best choice. If you want to do an all out build then I would say LB7 just because they've been around longer so you can get it cheaper and probably find parts for it easier. 01-02 seem to have the most issues with injectors and 03-04 LB7s to a smaller extent. 04-05 LLYs sometimes have overheating issues. It's not uncommon for them to shorten rods and blow out the side of the block if it gets too far out of spec. LBZ have had some piston cracking issues when running aftermarket turbos and dual fuelers, but I haven't heard of many cracked pistons lately. I haven't heard much about the new LMMs. They seem to be a pretty solid engine, but they do have the DPF and other new emissions stuff. dogzapper 11-11-2007, 10:37 AM Lbz kgt 11-12-2007, 01:23 AM lbz hands down, and I see them all at the dealer.... RYDNHI4x4 11-12-2007, 04:10 AM Lbz Duramax in Georgia 11-12-2007, 01:01 PM I agree, LBZ. cargoone 11-12-2007, 01:11 PM This is interesting, everyone telling you LBZ owns one. I own an LLY, but from what I have seen the LBZ is about the best. With that said, my GMC dealer (who is also a good friend) says LLY was best engine built. I was considering trading in my LLY for LMM and he said don't do it, keep the LLY. You would think he would want the sale. 8100 Power 11-12-2007, 01:34 PM This is interesting, everyone telling you LBZ owns one. I own an LLY, but from what I have seen the LBZ is about the best. With that said, my GMC dealer (who is also a good friend) says LLY was best engine built. I was considering trading in my LLY for LMM and he said don't do it, keep the LLY. You would think he would want the sale. Ofcourse.....We love our trucks...:D BLUEHERON 11-13-2007, 01:09 AM I had the LLY and never had a problem with it. Lots of stories of overheating, but I never experienced it, although the fan ran a lot. It was chipped with the Edge Juice and I didn't hammer it much but the engine performed well in all circumstances, towing, commuting and just horsin' around. Solid motor from my experience. I now have the LMM and can't complain either (except it's so damn quiet. I need SOME diesel noise!). This one is bone stock and will be for awhile, I'm afraid. The concensus here is to get the LBZ, and I can't offer an opinion on that, but I don't think you can make a BAD decision. Good luck with whatever you end up with...... nwpadmax 11-13-2007, 01:39 AM LB7s make good pullers! Diesel Power 11-13-2007, 01:42 AM LB7, LB7, and..uhm yeah LB7 :) Twister773 11-13-2007, 02:29 AM haha :funnypost LBZ jbcox43 11-13-2007, 06:45 AM The best is the one you own.....With out a doubt!!! Sand Bag 11-13-2007, 07:17 AM We should all answer his other questions though....any issues like injectors or other components breaking or being a weak link? But I'm sure that all matters on what his plans are for the motor...we need answers on both ends! Looks like the score so far is: LBZ: 6 LB7: 3 LLY: 1 LMM: 1 I'm sure the TTPA points champs would have some knowledeable input on this subject.:rolleyes: JoshH 11-13-2007, 07:26 AM We should all answer his other questions though....any issues like injectors or other components breaking or being a weak link?I'm pretty sure I did answer those questions in the first reply of this thread. Tony Burkhard 11-13-2007, 09:16 AM If you want to build a monster you will want to build an LBZ short block with an LLY fuel system, I call it the LLZ. LBZ fuel system has come along way and may soon be the one to have on the monster motor. LB7 is like gen one cummins, time to move on to somthing bigger and better :D FLSTFI Dave 11-13-2007, 12:09 PM I have owned an LB7, LLY and LBZ....All crew Cab duallys. LBZ would be my first choice LB7 would be my second choice 06 LLY my third choice I would not own an 04 or 05 LLY JoshH 11-13-2007, 12:17 PM I have owned an LB7, LLY and LBZ....All crew Cab duallys. LBZ would be my first choice LB7 would be my second choice 06 LLY my third choice I would not own an 04 or 05 LLYWhy an LBZ over an LB7, but an LB7 over an 06 LLY? FLSTFI Dave 11-13-2007, 02:18 PM Why an LBZ over an LB7, but an LB7 over an 06 LLY? LBZ has the higher HP and Higher torque diesel. It also has the six speed allison vice the five speed allison. LLY HP and torque are not much higher than the LB7...LB7 gets better mpg. 06 LLY is only a three month production run. JoshH 11-13-2007, 02:21 PM Speaking from experience I'll say that an 06 LLY is much closer in power numbers to an LBZ than it is an LB7. The 06 LLY is significantly under rated by GM. Supercop8100 11-13-2007, 07:01 PM LBZ P.S. Because it is in ginormous font, it counts as 10 votes. :D nrk07LBZ 11-13-2007, 08:28 PM I love my LBZ. Lots of power and lots of turbo whistle with a free flowing exhaust, unlike the older motors. And you get the 6 speed allison with the manual option if you get an 06 or an 07 model LBZ. Tony Burkhard 11-13-2007, 09:32 PM For a stock truck or with little upgrades the LBZ is the one, but not for big builds, YET. McRat 11-13-2007, 09:46 PM The LiLLY's are the meanest. It's that Boy-Named-Sue syndrome I believe. SSchmi5519 11-13-2007, 10:19 PM Thank you McRat... lol Dont the LBZ's defuel at 3500 RPM's anyway? I was looking at them all just like you were and opted for the LLY. 8100 Power 11-13-2007, 10:23 PM Thank you McRat... lol Dont the LBZ's defuel at 3500 RPM's anyway? I was looking at them all just like you were and opted for the LLY. Programming can take care of the limit.. moparmotel 11-13-2007, 10:25 PM lbz | ||