jwmcgregor Posted June 26, 2018 Share Posted June 26, 2018 I'm new here and new to Mack trucks. I purchased some CHU's out of a fleet. They have MP8 415's. DPF 2009-2010 trucks. I like them as they are spec'd out perfect for what we do. However...right now one of them is at my local mack dealer with a broken crankshaft. It took the block out with it so the whole lower end is toast. Is this an issue with MP8? The trucks had rev limits at 2250 when they where delivered. I set them to 1950 shortly after they went into service. My dealer is telling me they will not install anything but a Genuine Mack rebuild engine. Is this a common practice? I can buy a low mile MP8 that's been taken out of a truck for one reason or another from multiple sources for about 25% the price of the "Genuine mack rebuilt". Does putting in a short block or another MP8 in that truck require flashing and programming at the dealer level? How tight a grip do they have on my nuts here? Thanks! Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/ Share on other sites More sharing options...
Popular Post Dirtymilkman Posted June 27, 2018 Popular Post Share Posted June 27, 2018 That is definitely not a common issue. I've never seen a mp8 lower end failure. Usually just injectors. I'm sure you're dealer wants to sell you a reman to make more money. I'd go for the used motor but do injectors and cups in it. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401408 Share on other sites More sharing options...
fjh Posted June 27, 2018 Share Posted June 27, 2018 yup agree bottom end on these is not to bad its the heads and all the bolt ons that have the issues! Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401420 Share on other sites More sharing options...
jwmcgregor Posted June 27, 2018 Author Share Posted June 27, 2018 (edited) Any idea on the dealer level support needed in putting in a new short block or complete power plant? Do all the new/used sensors need calibrating to communicate with my control modules or is it “plug and play” stuff? I’m concerned about the support I’ll get if I load it up and take it out of there shop in order to install a used power plant as they will only install the Mack ReMan engine which is 4x the price of the 200k mile MP8 complete engines that I am finding available. Edited June 27, 2018 by jwmcgregor Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401428 Share on other sites More sharing options...
Mackpro Posted June 28, 2018 Share Posted June 28, 2018 One of our customers has a 2008 CHU MP8 485hp that they use for moving heavy equipment. They got a new loader or some new super heavy piece of equipment that was to much for the 485 HP so they bought a 605 Titian. One day the Titian was busy so they hooked the 485 HP up to this 100,000 pound piece of equipment. It didn't make it far and broke the crank. Truck had under 150,000 miles on it. We put a Mack reman engine in it. That was the only crank failure we have seen in the MP8. One of our other shops have seen a couple MP7 broken cranks but unknown of details. Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401470 Share on other sites More sharing options...
Hayseed Posted June 28, 2018 Share Posted June 28, 2018 On 6/27/2018 at 9:37 AM, jwmcgregor said: My dealer is telling me they will not install anything but a Genuine Mack rebuild engine. What are their reasons/justification for this...??? On 6/27/2018 at 9:37 AM, jwmcgregor said: How tight a grip do they have on my nuts here? And twisting & squeezing, I reckon... I can see where they're coming from if truck was under Warranty. But on an 8-9 Yr old Truck ??? This is straight out Gouging In My Opinion.. Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401474 Share on other sites More sharing options...
fjh Posted June 28, 2018 Share Posted June 28, 2018 yup they want to may money how ever! you also get a so a solid outcome with a warranty ( for what its worth ) for your extra zillion dollars! Again the truck is close to the end of its DESIGNED life span ! 2004- 2010 . 10 years . 2010- 2018 5 year life span! 👿 Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401493 Share on other sites More sharing options...
jwmcgregor Posted June 28, 2018 Author Share Posted June 28, 2018 (edited) 11 hours ago, Hayseed said: What are their reasons/justification for this...??? And twisting & squeezing, I reckon... I can see where they're coming from if truck was under Warranty. But on an 8-9 Yr old Truck ??? This is straight out Gouging In My Opinion.. They say “it’s never worked out. There’s always something wrong wit a sensor or something on the salvage engine”. Rediculous..I have three other matching units with 450k miles...if a 250k mile take out is not worth putting in a truck does that mean that my other three units are due for rebuild? I should hope not.. Edited June 28, 2018 by jwmcgregor Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401496 Share on other sites More sharing options...
jwmcgregor Posted June 28, 2018 Author Share Posted June 28, 2018 11 hours ago, Mackpro said: One of our customers has a 2008 CHU MP8 485hp that they use for moving heavy equipment. They got a new loader or some new super heavy piece of equipment that was to much for the 485 HP so they bought a 605 Titian. One day the Titian was busy so they hooked the 485 HP up to this 100,000 pound piece of equipment. It didn't make it far and broke the crank. Truck had under 150,000 miles on it. We put a Mack reman engine in it. That was the only crank failure we have seen in the MP8. One of our other shops have seen a couple MP7 broken cranks but unknown of details. MacPro...is dealer level support required to put a new/used/different power plant into service on the truck? Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401497 Share on other sites More sharing options...
Mackpro Posted June 28, 2018 Share Posted June 28, 2018 maybe. If you use the engine ECM that comes with your new (used) engine it won't match the VIn of the other ECMs and you will have issues in the future if any programming needs to be done. If you use the original engine ECM with new (used) engine then the injector calibration codes won't match and that can cause other issues Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-401506 Share on other sites More sharing options...
jwmcgregor Posted July 6, 2018 Author Share Posted July 6, 2018 Well.. I’m in need of a doner engine for a 2010 chu613 with MP8 415C. DPF not SCR. Can anyone tell me if this 2011is a compatable donor? It is DPF and SCR family ABPTH12.8SOI Serial 938209 Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-402063 Share on other sites More sharing options...
steeler Posted July 10, 2018 Share Posted July 10, 2018 I'll tell you why they won't do anything other than a reman. For one, they don't like the idea of someone "bringing in their own steak" to have them cook it for you. They get no profit in parts that way, just labor. 2nd, and I'm speaking from experience here is that there is almost always (for my shop anyway) issues with this or that being different/not working with your application. It can become a huge pain in the rear, especially after they give you a quote and end up 20 hrs over what they told you it would cost. Our shop went through it not long ago with an mp7. Tried to install engine only to find out there are a zillion different flywheel housings for the mp. And the one on the original engine was no good. We won't do it anymore, only Mack remans. Every time we install a customer supplied used engine we lose our butts. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-402213 Share on other sites More sharing options...
Hayseed Posted July 10, 2018 Share Posted July 10, 2018 Here in Australia "vomack" have their own used Parts division.. https://www.vmrtruckparts.com.au/ Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-402216 Share on other sites More sharing options...
Timmyb Posted July 10, 2018 Share Posted July 10, 2018 3 hours ago, Hayseed said: Here in Australia "vomack" have their own used Parts division.. https://www.vmrtruckparts.com.au/ Is that because they don’t intend to supply new parts longer than 10 years or something? It’s what I’ve heard somewhere. Quote Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-402220 Share on other sites More sharing options...
Hayseed Posted July 10, 2018 Share Posted July 10, 2018 36 minutes ago, Timmyb said: Is that because they don’t intend to supply new parts longer than 10 years or something? It’s what I’ve heard somewhere. I think , They're only legally obliged to provide Spare part support for 10 yrs.... Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/53674-mp8-broken-crankshaft/#findComment-402221 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.