disalvo Posted February 26, 2012 Share Posted February 26, 2012 I was hoping to get some good opions on macks mp7 and mp8 reliabilty..I currently own 3, 04 cv713 with the 427 and have had very few problems had to do the cam and lifters on one and thats it other than that pretty reliable. I also have a 06 ct713 with the aset and have had no problems so far. Was looking to buy a 07 or 08 with the MP but real nervous about what i'm reading about them. Would really like some solid advice on what i would be getting to..\P.S. All my trucks are Dump Trucks Quote Link to comment Share on other sites More sharing options...
mike69mackman Posted February 27, 2012 Share Posted February 27, 2012 mp8 motors have proven to be good so far, talked to alot of bynum tank drivers they love that motor!! Mike. Quote Link to comment Share on other sites More sharing options...
Green Dash Posted February 27, 2012 Share Posted February 27, 2012 There's an '08 Pinnacle tractor at work with an MP7 that's had a lot of shop time recently. Coolant was getting into the emmisions system and the truck was doing a regen every few hundred miles. The reason for the excessive downtime was that Mack couldn't find the problem after throwing thousands of dollars worth of parts at it (under warranty).I guessing this tractor is the exception rather than the rule because the company bought 120 2011's and is adding 100 more 2012's, all with MP7's. Quote Jim Link to comment Share on other sites More sharing options...
REEL ADDICTION Posted February 27, 2012 Share Posted February 27, 2012 i have a 2012 triaxle dump that i have a bout 30k miles no problem so far alot more power than my older macks Quote Link to comment Share on other sites More sharing options...
Mackpro Posted February 28, 2012 Share Posted February 28, 2012 If I was buying new I would have no problem buying a MP7 or 8, but a used one makes me wonder, have the dealer give you a warranty with it!. Otherwise i would buy another CV with a AI engine. Look for some low mileage Highway/DOT trade ins, They usually have smaller engines butthe HP could be bumped up. Quote Link to comment Share on other sites More sharing options...
rick harper Posted February 28, 2012 Share Posted February 28, 2012 The 07EPA engines were reliable but alot of Regen issues for the vocational markets not building enough heat to let the system regen on its own. One would have to do manual regen quite often. The EPA10 engines running DEF fluild are doing extremely good with very little regen issues. I would buy a the EPA10 engine over the EPA07 engine Quote Link to comment Share on other sites More sharing options...
disalvo Posted March 1, 2012 Author Share Posted March 1, 2012 Thanks for all the info.. Think I'm going to stick with CV for now..Thanks again to everyone.. Quote Link to comment Share on other sites More sharing options...
Sledneck32 Posted January 23, 2017 Share Posted January 23, 2017 Bump on this topic. How they been holding up? Quote Link to comment Share on other sites More sharing options...
james j neiweem Posted January 23, 2017 Share Posted January 23, 2017 Bynum tank lines seems to be IH and Freightliner now. Quote Link to comment Share on other sites More sharing options...
Sledneck32 Posted January 24, 2017 Share Posted January 24, 2017 Noob here bear with me... IH is International? So they got rid of the 120 macks they got in 2012 or they never got em? Quote Link to comment Share on other sites More sharing options...
beatngu Posted January 27, 2017 Share Posted January 27, 2017 At the nysdot all the newer macks have got the mp7 and they rarely have downtime i drove a 2013 mack garbage truck with minimum issues and that thing got BEAT. Only real issue i had with her was the def or fuel was geling Quote Link to comment Share on other sites More sharing options...
Keys Posted February 26, 2022 Share Posted February 26, 2022 I have a 2012 Mack with a MP7 when I start it up it runs for about 30 seconds and locks up and I have to wait for about a day before I could crank it again it will not turn over but after that day the next day I can crank it again and runs for about 30 seconds and locks up. Please help can’t figure out what’s wrong Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted February 26, 2022 Share Posted February 26, 2022 When you say it locks up while running.... I'd be surprised if it didn't bend a connecting rod, because it sounds like there is an excessive amount fluid entering a cylinder, ie: fuel, coolant, oil... does it smoke bad when it runs? Is the oil level rising? is the coolant level dropping? My first thought would be a bad injector that is over fueling a cylinder. do you have any active or inactive fault codes? You really need to stop running this engine before major damage occurs. Hopefully it is not hurt too bad now.. do you have a bore scope that you can run into the intake manifold to see if there is a really wet intake port? Is there fluid leaking from the exhaust starting and the manifold, turbo, and any clamps before it gets to the DPF? I'm sorry about all of these questions. More info will be here shortly.... jojo Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted March 8, 2022 Share Posted March 8, 2022 On 2/26/2022 at 4:38 AM, Joey Mack said: When you say it locks up while running.... I'd be surprised if it didn't bend a connecting rod, because it sounds like there is an excessive amount fluid entering a cylinder, ie: fuel, coolant, oil... does it smoke bad when it runs? Is the oil level rising? is the coolant level dropping? My first thought would be a bad injector that is over fueling a cylinder. do you have any active or inactive fault codes? You really need to stop running this engine before major damage occurs. Hopefully it is not hurt too bad now.. do you have a bore scope that you can run into the intake manifold to see if there is a really wet intake port? Is there fluid leaking from the exhaust starting and the manifold, turbo, and any clamps before it gets to the DPF? I'm sorry about all of these questions. More info will be here shortly.... jojo Never heard back from him? I was curious about that one. Did sound a whole lot like a hydraulic lock, didn't it? Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Keys Posted March 13, 2022 Share Posted March 13, 2022 What I mean by locking up is it just stops running. Was having to add water all the time haven’t figured it out yet Quote Link to comment Share on other sites More sharing options...
Keys Posted March 13, 2022 Share Posted March 13, 2022 Doesn’t smoke and no fault codes has me puzzled Quote Link to comment Share on other sites More sharing options...
JoeH Posted March 14, 2022 Share Posted March 14, 2022 Is the water going on the ground or into your oil pan... Sounds like you need your engine torn apart before you send a connecting rod out the side of your block or break your crankshaft... 1 1 Quote Link to comment Share on other sites More sharing options...
JoeH Posted March 14, 2022 Share Posted March 14, 2022 A tow to the mechanic to repair this thing is cheaper than what you're likely to do to it next time you start it... 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 14, 2022 Share Posted March 14, 2022 JoeH is giving you good advice.. jojo 1 Quote Link to comment Share on other sites More sharing options...
Hayseed Posted March 14, 2022 Share Posted March 14, 2022 20 minutes ago, JoeH said: Sounds like you need your engine torn apart before you send a connecting rod out the side of your block or break your crankshaft... ^^^^^^^ What he said ^^^^^^^ 1 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 Share on other sites More sharing options...
fjh Posted March 14, 2022 Share Posted March 14, 2022 1 hour ago, Hayseed said: ^^^^^^^ What he said ^^^^^^^ second that!😡 1 Quote Link to comment Share on other sites More sharing options...
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