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  1. 06-07 LBZ & LLY Duramax Powertrain
    Okay, don’t know if this is really the right place for this thread, but i was talking to a buddy today about my lbz and he claimed that the lbz is bad..? he has a 2008 lmm which as far as my knowledge is practically the same engine but with a dpf. and he told me that one of this family members...
  2. 11-16 LML Duramax Powertrain
    Hi all! New member here. I have a 2015 with 415k on it. I’ve had super luck with the truck overall, but alas I figured it had a blown head gasket when I was putting a gallon of coolant in at every fuel stop… I found a diesel performance shop where I live in Ocala, FL. As I suspected they told me...
  3. General Discussion
    I’m new took me 20 mins to find out how to post lol! I’ve got a 2004 lly duramax I just bought I’ve owned for less then 2 weeks! Test drove it twice no issues no leaks other then ac. Me and the lady decided to buy after everything cheeking out drove the beast home an hour away parked it got up...
  4. General Discussion
    I have a 03 Lb7 with 175,000 miles, I had new bosh injectors put in 3,000 miles ago and I'm now experiencing low coolant levels and a hard radiator hose. So, my question is, is it worth is or not to put in the money to do the head gaskets or to sell. My alternative would be to attempt to do...
  5. General Discussion
    I have a 07 chevy lbz with 86k miles on it, and im leaking coolant slowly, i thought it was from heater core adapter coming out of the fire wall but its not, its not the egr because that is fully removed, its not the heater core line and nothing els i can see on top of the engine. I can see...
  6. 911 Problems Forum
    2011 duramax. Egr and fuel filter delete( filter head removed) fass 165 lift pump 3 inch down pipe lb7 up pipe h&s mini max pcv reroute. I just replaced headgaskets and lower oil pan gasket. Cranked over with no glow plugs to try and prime up oil before actually running at idle speeds. Installed...
  7. 01-04.5 LB7 Duramax Powertrain
    I got a 03 Lb7 with 200,000 miles I'm planning on doing a drop in Ryans 64mm turbo in the future, So I'm going to be studing the truck while I do injectors. I know ARP is a very accredited brand, but a set of Xotic head studs are $300 cheaper with very good reviews. Was curious if anyone has...
  8. 911 Problems Forum
    I have a 2005 lly with 107k and it has never been modified or abused. About a year ago I had it push coolant and since then it has had a hard upper radiator hose and it has pushed coolant out a handful of times. It also will run hot randomly and the weather does not effect it. I have not had a...
  9. 06-07 LBZ & LLY Duramax Powertrain
    So my aunt – Temp gauge likes to bounce around and stay at the halfway mark between 160 and 210, and then when I get on The throttle it sometimes jumps back up to right under 210 on the dash temp gauge where are normally used to sit, I have a scan tool that reads life data and regardless what...
  10. 04.5-05 LLY Duramax Powertrain
    So I just finished putting new head gaskets in my 2005 lly. 183k miles and bone stock up until I bought it. When I bought the truck it had typical HG symptoms... black tank, bubbling coolant at cold start with cap off, blowing coolant out when driving etc. So I decided to buy the truck for low...
  11. 01-04.5 LB7 Duramax Powertrain
    Hey all! I have a stock 2001 lb7 3500 dually. It blew a head gasket(!) about 11 months ago or so. I took it apart while leaving the cab on and the turbo on. Unfortunately a few days before I was going to assemble everything while waiting for parts in the mail, I found out I had Lymphoma and it...
  12. 01-04.5 LB7 Duramax Powertrain
    Yes another post but after hours and hours of researching i'm still not entirely sure. My only sign so far is a somewhat stiff upper radiator hose and some pressure in coolant reservoir after a day or so of sitting. Is that normal? Replacing the radiator cap seemed to actually alleviate a lot of...
  13. 11-16 LML Duramax Powertrain
    Hi all; sure hope I'm posting this in the right forum. Please LMK if I should move it elsewhere. First, about the truck: It's a 2015 3500 LT w/ ~295k miles. It has an EFI tow tune and EGR delete (done by previous owner) and a lift pump (done by me), otherwise its stock. Spent its previous...
  14. 2017-19 GM T-K2 Platform Powertrain
    Hello all , I have a 2018 3500hd dually, we use for hauling. truck has 169K miles on it now. have done every possible recommended maintenance on truck since new in 2018! followed everything per GM ! Recently about 3,000 miles ago had to replace turbo due to veins sticking! after turbo was done...
  15. General Discussion
    Hello, i’ve got an lbz duramax leaking about a gallon of coolant into the crank case in 5 minutes. I’ve been doing a bunch of research and have seen it can be the water pump and head gasket. i’d like to think it’s the water pump but it was just replaced 3,000 miles ago. I had a shop diagnose it...
  16. General Discussion
    i have a 06 lly for about a year now and been loving it, i noticed a slight bit of oil around the head gasket on the passenger side rear. checked all the symptoms for a blown head gasket and everything checks out okay and it looks to be traveling down from somewhere higher up. ive read some...
  17. 06-07 LBZ & LLY Duramax Powertrain
    i have a 06 lly for about a year now and noticed a slight bit of oil around the head gasket on the passenger side rear. checked all the symptoms for a blown head gasket and everything checks out okay and it looks to be traveling down from somewhere higher up. ive read some people have seen the...
  18. Performance Upgrades
    So a while back I parked my 2003 2500hd CCLB after having a generous amount of oil come out of my crank case breather tube. I stopped driving it right there and then. Did an oil change and rather than the usual 2.5gal out came 5gallons of really, really thin oil. My first thought was fuel in the...
  19. Drivetrain
    So a while back I parked my 2003 2500hd CCLB after having a generous amount of oil come out of my crank case breather tube. I stopped driving it right there and then. Did an oil change and rather than the usual 2.5gal out came 5gallons of really, really thin oil. My first thought was fuel in the...
  20. 04.5-05 LLY Duramax Powertrain
    replacing my headgaskets and putting studs not sure If i should worry bout injectors or cp3 while I'm there was wondering if known to have issues an how the cp3 last I am getting the mbrp downpipe to put on 2 just dont know what else i have to do i know it needs the hoses on the fuel lines any...
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