Lly duramax cracked heads

Duramax diesels forum duramaxdiesel technical duramax hard parts lly lly coolant coming ftom. Upgrades over previous years included a garret turbocharger that allowed general motors to meet new diesel truck emission standards while maintaining the original powertoweight ratio. While it retained the lly designation, mechanically it is identical to the lbz and is mated to the new 6speed allison transmission. I own a 2005 silverado 3500 lly duramax dually lt crew cap long bed and the handbrake cable is broken close to the driver side rear wheel. Here at driving line, weve spent inordinate amounts of time spelling out just how capable the duramax is in the performance sense, but weve never poured over the finer detailsthe nuts and boltsthat make gms 6. Lly duramax engine complete long block diesel experts. Second series duramax diesels gave gm a leg up on competition in the light truck wars. First introduced in 2004, the duramax lly engine is a 32valve turbocharged diesel engine made popular by the hummer h1, chevy silverado and gmc sierra. Heads in chico, california, to be checked for cracks, cleaned, and.

If not that may be the issue and the coolant is steaming out by the injector. Unless otherwise marked, all engines and parts are for competition use only. When duramax incorporated the use of the egr cooler, the cooling system of the engine was not upgraded. We do not weld or repair cracked blocks, cranks or heads. Best value 4091 reconditioned lly duramax cylinder heads. While all iterations are fairly reliable, the older 0104 lb7 engines and 04. What is the deal with duramax diesel head gasket thickness. Its cracked down at the bottem of the injector bore that protrudes into the combustion chamber. These heads had cracked and were causing a large coolant leak. It is a 32valve design with commonrail direct injection and aluminum cylinder heads. While various versions of the engine have surfaced over the years, all generations of the duramax are based on the same foundation. The duramax block and heads are poured at the defiance gm powertrain foundry in defiance county, ohio.

Since its introduction, the duramax has gone through lbz, lly, lbz, lmm. We have replaced gaskets on every platform of duramax, but the lly seems to. Midway through the 2004 model year, gm released the secondgeneration duramax, rpo code lly. See our cylinder heads quality performance aluminum street heads. Heads, castaluminum with six 14mm diameter head bolts per cylinder with sharing. And, like the lb7, compression once again checks in at 17. Sinister diesel heads up kit w arp heads for 20112015. Heads cracked at the injector just fixed one last week llys.

The lly brought variable geometry turbocharging, 50state emissions equipment and more reliable. Possible cracked head, or cyl chevy and gmc duramax. Since its introduction, the duramax has gone through lbz, lly, lbz, lmm, and lml designations, with a number of revisions along the way. They have developed and designed this new cylinder head from the oe casting but improved the casting strength and thickness in all the crack prone areas. Preparing for added horsepower and torque over the outgoing lly, gm cast. Browse our huge inventory of all duramax engines, s in stock and ready to ship. With the lly duramax sharing the same connecting rod as the lb7, its no surprise that this component is also the weakest link in the second generation of the duramax. This is a direct bolton aluminium cylinder head that replaces your difficult to access fractured factory cylinder heads. The price of these heads is in between the other two but the difference is that they will take the cracked head as a core where the other two places wont. Although much of the llys internals match what youll find in the lb7, this version of the 6. Promaxx performance cylinder heads are designed as replacement cylinder heads with thicker castings in crack prone areas. New fits gm gmc chevy truck 6 6 duramax diesel lly cylinder head engine code 2 ebay. Unfollow lly duramax heads to stop getting updates on your ebay feed.

Dhds line of reconditioned duramax cylinder heads offers superior value with no compromise in quality. To avoid cracked components these remanufactured units have 100 percent magnaflux tested blocks and crankshafts. Our reconditioned heads are thoroughly reworked in a state of the art rottler equipped machine shop and assembled with only the best oe components. Core plugs are 100 percent stainless steel to avoid corrosion aluminum cylinder heads are dyed to check for cracks oil cooler, pump, pan, and pickup tubes. Mar 25, 2017 lly duramax cracked head on cylinder 1,3 and 7. New gm chevy truck silverado hd kodiak sierra hd express savana lly 6.

How to tell if you have bad head gaskets on your duramax. The duramax engine is a general motors diesel engine family for light to medium duty trucks. Each sinister diesel heads up kit for the lly duramax engines also comes with a complete gasket set for every engine component that seals against the cylinder head including the exhaust manifold, up pipe, upper and lower valve cover, along with valve cover grommets, valve seals, and turbo drain seals. Promaxx performance has the answer for the epidemic of cracked gm 6. Jun 09, 2011 my duramax lly is losing coolant at a considerable rate but i cant find the leak. Each head has all new seats, guides, valves, and stem seals, as well as being resurfaced and magnafluxed. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install.

Is the injector supposed to have coolant in the sleeve. My duramax lly is losing coolant at a considerable rate but i. The duramax v8 engine is a general motors diesel v8 engine family for trucks. Anyone can get a head to produce high flow numbers, but if doing so leaves the port wall to thin the casting will crack. When gm introduced the duramax diesel in 2001, it was truly a state of the art engine.

How to diagnose blown or bad lb7 lly lbz lmm lml duramax head gaskets. I own a 2005 silverado 3500 lly duramax dually lt crew cap long bed and the handbrake. Edelbrock is the most respected name in performance. When towing with the lly up steep grades on a hot summer day, owners often noticed that the cooling system could not sustain the engines temperature and would overheat. Duramax cylinder heads and turbo bearing play part 3 duration. I had an injector that had coolant escaping around it and i replaced the seals and it seemed to stop that problem. This is a video of the other cylinder head on the truck. Carrillo has provided custom and prototype connecting. Since 1963, carrillo is recognized as the preeminent custom connecting rod manufacturer in the world. Promaxx performance has the answer for the epidemic of cracked gm duramax 6.

Gm had a good thing going with the original lb7 duramax engine, so they wisely decided to keep changes to a minimum when they introduced the new 310hp 6. The quick and easy way to tell you have a head gasket issue once you notice coolant being. Allied motor parts has over 150 years of experience of remanufacturing automotive and light truck cylinder heads. When towing with the lly up steep grades on a hot summer day, owners often noticed that the cooling system could not sustain the.

Ssdiesel supply duramax engines, heads and components. Both new and remanufactured short blocks, long blocks and complete dropin engines. The heads up kits from sinister diesel are designed to give duramax engines needed strength to handle additional horse power and torque without engine damage. As is shown in the photo above, almost all pistons crack along the center. My duramax lly is losing coolant at a considerable rate but i cant find the leak. Lly coolant coming ftom around injector archive duramax. We assemble each kit with a head stud set, the correct head gaskets, and all associated gaskets and seals for your engine so that you can avoid the most common issues that come along with. In 2006, the lly featured some more extensive mechanical changes such as connecting rods, heads and injectors, but the initial lly was basically the same engine as its. Over time as the headblock surfaces warp and the strength of the head bolts weaken, the head can lift causing combustion pressure to go directly into the coolant system. Whether its a duramax, cummins, or powerstroke these are the. Designed by promaxx from an oe casting, promaxx improved the casting strength with greater thickness in all crack prone areas.