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01-02-2019, 08:30 AM
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#29
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Senior Member
Join Date: Jun 2017
Location: Leonard, Michigan
Posts: 150
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Quote:
Originally Posted by ericjan2011
Charndog. I have a 2011 with 18k. Drove from Maryland to Atlanta. Averaged 57 mph and 10.1 MPG. No issues except a low oil pressure alarm going on and off occasionally. Probably a bad sensor. It only happened going up hill when the pressure dropped down to about 40-45 lbs. Normally about 55-60 lbs. I'll have it checked out this springtime, but several have complained about all of the false alarms and lights.
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Sorry, haven't looked into that one, nor have I heard of it.
I could speculate or guess but you don't want that. I would start with trying to see if it triped a fault code. Of course check the oil level. other than that, dealer.
Or you can search on line, Navistar may have something.
Good luck, let us know what you learn.
Greg (charndog)
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01-02-2019, 11:27 AM
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#30
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Junior Member
Winnebago Owners Club
Join Date: Nov 2015
Posts: 10
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My Serrano Experience
I have a Serrano, which I purchased with a few thousand miles, and it now has in the mid 20's. I've been following the engine issues for some time. I had the same problem as everyone has- the tube into the turbo comes off. But, the fix is brain dead- you just tap holes through the bracket and put in a couple of screws to keep it connected. After reading about these engines for years, I think this accounts for 90 percent of the issues. I can't imagine why Thor didn't just do a recall.
The good news is that if you take care of this, the engine is trouble free. And, the upside is enormous. I get truly unbelievable fuel economy (11-12), and no need to add urea. One interesting thing I have noticed is that my fuel economy seems to be going up with time. At 25k the engine still may be breaking in.
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05-19-2019, 08:11 AM
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#31
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Junior Member
Join Date: May 2019
Posts: 5
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I have a 2014 Tiffin Breeze with maxxforce 7. During acceleration I push out some black smoke. Other than that it runs great. Does yours push out black smoke
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07-13-2019, 04:42 PM
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#32
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Junior Member
Join Date: Jul 2019
Posts: 11
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Quote:
Originally Posted by dbear
All of the lawsuit info I was able to find was for 2008-2013 MF11, 13, & 15 engines found in class 7&8 trucks. Nothing regarding MF7.
Navistar lawsuits
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Happy to hear!
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07-14-2019, 07:45 AM
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#33
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Junior Member
Join Date: May 2019
Posts: 5
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My advice to you is stay away from the maxxforce engine. My Maxxforce 7 was a nightmare. There were a lot of issues with those engines . Google Maxxforce engines the reviews are bad . Go with a Cummins, I finally did.
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07-14-2019, 09:47 AM
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#34
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Member
Join Date: Jun 2018
Posts: 77
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2011 Breeze 28, MaxxForce7 with 38,000 miles, no problems. The problems you might read about were with the later years, 2013-2015, which was a different engine, designed to meet the 2010EPA requirements.
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11-02-2019, 09:10 PM
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#35
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Mar 2016
Posts: 562
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I have a 2011 H/R Trip with a MF7 engine and with 22,000 miles now and not one issue. I do not let it idle for more than 10-15 minutes. I drive at 60-64 mph, some times towing a jeep wrangler, and we get about 11.5 to 12.5 mpg average our trips. It will climb hills just fine, no overheating issues even in 105 deg. temps out here in the west. No parked re-gens. Totally happy with this engine, it runs great.
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11-03-2019, 04:59 PM
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#36
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Junior Member
Join Date: May 2019
Posts: 5
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Glad to hear that you are having luck with yours. My MaxxForce had major issues. I traded mine in for a Newmar with the Cummins 360. Good luck.
Show quoted text
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11-03-2019, 05:38 PM
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#37
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Senior Member
Join Date: Dec 2011
Location: Houston TX.
Posts: 2,349
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Old thread but
RUN AWAY
__________________
Full timed in 2008 Newmar Essex. Currently part time in 2020 Entegra Esteem 29v tow Jeep Wrangler
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02-17-2020, 12:18 PM
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#38
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Junior Member
Join Date: Feb 2020
Posts: 1
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MaxxForce 7
Quote:
Originally Posted by johnace135
Glad to hear that you are having luck with yours. My MaxxForce had major issues. I traded mine in for a Newmar with the Cummins 360. Good luck.
Show quoted text
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Im curious, what problems did you have?
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02-17-2020, 10:45 PM
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#39
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Junior Member
Join Date: May 2019
Posts: 5
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Constant amount of black smoke coming from exhaust. Just like being followed by a black cloud
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05-01-2020, 07:42 PM
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#40
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Junior Member
Thor Owners Club Workhorse Chassis Owner
Join Date: Apr 2020
Location: St Paul, MN
Posts: 7
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Performance Update
Quote:
Originally Posted by vnorvi
We are the second owner of a Serrano. The engine has been great. Nice power and we get 11 mpg. 24000 miles so far. All is good with one exception. The rubber tube comes off the turbo inlet. This is not a huge repair but is annoying, and will happen to all of them eventually. It is easy to repair with a more substantial bracket or screwing it on. Take care of it before it happens.
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We are in the process of purchasing a 2013 Serrano with 39,500 miles on it. The previous owner claims to have had no issues with the motor. Wondering how many miles yours now has and how it is running now?
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06-02-2020, 10:35 AM
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#41
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Senior Member
Join Date: Nov 2011
Posts: 698
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Quote:
Originally Posted by Jdsandb
We are in the process of purchasing a 2013 Serrano with 39,500 miles on it. The previous owner claims to have had no issues with the motor. Wondering how many miles yours now has and how it is running now?
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The only engine problem was a bad turbo solenoid. We have just under 38000 miles on the unit. Runs great.
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06-03-2020, 05:45 AM
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#42
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Junior Member
Join Date: Jul 2019
Posts: 11
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No problems
We are at 54000mi and no problem at all.
Let it warm up before pushing it and idle for 5 min after a ride.
Give its love and it will be good for you.
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