07.5+ LMM Duramax PowertrainDiscussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect
would anyone suggest taking off the turbo and having it rebuilt at some point?
Hello Plato,
Look, I am just an old Diesel Nut for 40 years of driving and tinkering, and I do not profess to know much about the technical ends of the Isuzu based Duramax engine.... However, there are some general rules on diesels that I think pertain to you..
Most diesel engines last longer than the fuel injection components and they need service at some point.
Now in the Duramax, if you take care of the injectors with some added lube, I hear of people getting 200,000-300,000 out of injectors so this may not be the case, but service on them is likely before a general rebuild. On the turbo, there have been no failures of the turbo that I have heard of in Australia. But with all Turbos, usually if the bearing is getting a bit tired, the seals will start to leak first. This would be the major indicator, the seals, around the cooling system on the bearing. Even though they are reportedly ceramic, I would expect them to show leakage before you have bearing looseness enough to cause problems. By the way, I religiously cool my turbo down, at least a minute around town, and 2-3 minutes off the highway. This will extend the life of bearings and seals IMO>
Variable pitch turbos, may need service on the actuator, the servo that varies the pitch. But in general I would say the probability of necessary turbo service before the total engine rebuild is extremely likely, unless you are running hard with high HP tunes. In all cases, you have to Pay to Play, with all engines the harder you run them the shorter the life. From all my study and owning 2, and watch 50 of my Clients running them, I find this to be true.
I would expect 250-300,000 miles or more, out of the engine, with a likely fuel injection service earlier, depending on the fuel additives or lack there of, that you use...
Good post lone Ranger!!
One more thing that will prolong turbo life is shorter oil change intervals. I'm a freak and do mine every 3k. No questions asked.
__________________ 06 Chevy LBZ/Allison 4x4 EFILive & DSP5, Suncoast IV w/1054, Suncoast Tcase brace, MA pump rub fix, PPE lift pump, AEM Intake, shimmed fprv, ported rail fittings, 4"-5" Grandrock/MBRP, torsion bolts removed, 4" drop shackles, stock turbo, stock wheels, Autometer GS boost/pyro, Aeroforce scangauge, PPE sleeves, Cognito pitman/idler braces, 8k HIDs, Recon LED tails & smoked 3rd brake, Pioneer DVD, 98,000 miles and counting 12.60 @ 105.41 mph #15---Top 25 Fastest Stock Duramax's Keystone 8 Luggers Videos
Hello Plato,
Look, I am just an old Diesel Nut for 40 years of driving and tinkering, and I do not profess to know much about the technical ends of the Isuzu based Duramax engine.... However, there are some general rules on diesels that I think pertain to you..
Most diesel engines last longer than the fuel injection components and they need service at some point.
Now in the Duramax, if you take care of the injectors with some added lube, I hear of people getting 200,000-300,000 out of injectors so this may not be the case, but service on them is likely before a general rebuild.
01-04 LB7 injectors have problems and they all will fail at some point. Some only last 80k some last 160k. GM has a 200k injector warranty. 04.5+ dmax injectors will go forever, no "service" needed (im not sure what you mean by that, but HPCR injectors arent "servicable" and are not able to be rebuilt by any Joe Handyman...basically for the most part they either work 100%...or they dont work at all and need to be replaced)
Quote:
Originally Posted by lone Ranger
But with all Turbos, usually if the bearing is getting a bit tired, the seals will start to leak first. This would be the major indicator, the seals, around the cooling system on the bearing. Even though they are reportedly ceramic, I would expect them to show leakage before you have bearing looseness enough to cause problems. By the way, I religiously cool my turbo down, at least a minute around town, and 2-3 minutes off the highway.
The turbos on the dmax are very reliable. There is no set mileage that they will last and you cant accurately say "expect to replace it at XXX,XXX miles". It is water cooled so technically it doesnt need any cooldown (if you dont beleive me, think of all the hundreds of thousands of other duramax owners who dont know a single thing about turbodiesels, and they never have problems with turbos blowing up due to hot-shutdowns) if you are in a hurry, but if you can wait 30-45 seconds or so, thats all it needs.
Quote:
Originally Posted by lone Ranger
Variable pitch turbos, may need service on the actuator, the servo that varies the pitch.
there is no servo.....the vanes are actuated by a unison ring which is controlled/positioned by engine oil pressure.
No offense intended, those are just my own opinions...
i know this isn't the forum, but I need some quick advise... how/where do I disconnect the TC from the fly wheel on the allison or better yet where do I get to it from?
i know this isn't the forum, but I need some quick advise... how/where do I disconnect the TC from the fly wheel on the allison or better yet where do I get to it from?
pull the starter and get at the flexplate bolts through the starter hole. There are 6 of them.
Frankly, guys, i hope mine goes a lot more than 250-300K. Three of my last 5 gasser trucks went 250K+ with nothing but maintenance. One is at 320K with a new owner, and not yet ready for a rebuild. I would think 400K for a well-treated d-max should be normal.
j
__________________ buckmeister2, carson city, nv, 2004 dmax lb7 4x4,ext. cab LT SB, loaded, 3.73 rear, 168,000 miles, Banks 4" turbo-back pipe, no cat, HUGE muff + AirRaid CAI (both PO install), Mild ECM program by IdahoRob , Rollover ball gooseneck hitch for towing '09 Cougar 5th wheel, 35', 10,600 pounds
I have a friend (He is a farmer) and he got the first dmax in that area and the first one blew at 10,000 miles and the current one has over 500,000 on it no problems.
That would be almost 100k a year!!!! Good luck with that. There is one on hear that has a LBZ though with around 225K. But that dude puts on some miles. Also when I =was in getting my ECM re flashed there was a guy that had an 06 with 210k (Rotella miles) yes the only thing the dude will rune and yes he goes 10-12K
I was at the dealer a few months ago and talked to a guy that delievers cars all over the country to dealers. He told my he already put 98k miles on his 2009 dually in 9 months and was trading it in because he wanted to keep his trucks under warranty. Said he pulls anywhere from 2 to 4 cars at a time with it. Asked if he had any problems. Only complained mileage wasnt as good as his trucks in the past.
__________________ 2006 Chevrolet LBZ Crew Cab, 7in BDS Lift, 22in Eagle Boss wrapped with 325/50 Kumho A/T, 4in Bully Dog Cat Back Exhaust with 6in DualTips, Bully Dog Power Pup
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) yes the only thing the dude will rune and yes he goes 10-12K
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