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Old 12-21-2012, 01:33 AM   #1
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2012 Seneca Engine Noise


We have a new 2012 Seneca and were wondering if there are any other owners here that have an engine noise at about 55-65 mph that sounds kinda like a bad bearing. This "noise" goes away when I accelerate or back off the throttle. We had it at the dealer for some other issues and they took it to Freightliner to have the noise checked into along with some door wind noise addressed. $371.00 later Freightliner could not hear any noise. We hear it...the dealer hears it...but freightliner does not.

Wondering if others notice this same noise. It pops up at freeway cruise speed only.


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Old 12-21-2012, 02:21 AM   #2
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I don't have a MH, but you mention "hearing" a noise, is there any vibration associated to the noise? Did they check the clutch fan, U-joints? It could be a lot of different things.

This guy had a vibration issue with his 2013 Seneca: http://www.rv.net/forum/index.cfm/fu...d/26589797.cfm



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Old 12-22-2012, 02:06 PM   #3
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Hi Bob.

No vibration, just the noise. If I had to guess, Id say the noise comes from the throttle body. The noise can be affected by throttle position when the noise is happening. It's kind of a high pitch noise that can only be created at freeway speeds.

Not sure what they checked as they did a test drive (at the bargain price of only $142.00) and found no unusual sounds. What I'm trying to find out is if others M2's sound this way as well.


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Old 12-23-2012, 01:40 PM   #4
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See if they will let you take the mechanic for a ride... then you can recreate the conditions that cause the noise..
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Old 01-18-2013, 07:42 AM   #5
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Hi Busa1300. I have the noise too. I am on my first trip in the unit but the first time I got on the freeway, I noticed the noise at between 60mph and 65mph. To me it sounds like crickets chirping. I have no idea what it is, but I will have the freightliner people check it out when I return home. Have you had any luck with your freightliner service techs since December? To me the noise was obvious so they would have to be able to reproduce it I think. However, make sure the engine is warmed up before they drive it. On my first day out, I was several miles to the interstate and heard the noise right away, on my second day out, I was < 1 mile from the interstate and didn't notice the noise for a few minutes until the engine was warmed up.

I hope this helps and please post back if you discover any cause for this.


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Old 01-19-2013, 07:44 PM   #6
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I too have the noise
Crickets or chirping at 60 mph. To me sounded like fan belt noise
I never worried too much about it.
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Old 01-19-2013, 07:52 PM   #7
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Don't know if this is the same noise but this was posted on RV NEThttp://www.rv.net/CFORUM/index.cfm/f...d/26589797.cfm
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Old 03-03-2013, 10:07 PM   #8
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Sorry for the late reply. Been busy and rigs been at the dealer for a month!

Freightliner states noise is normal. The noise is from the throttle body and it can be altered by varying the throttle position. I'm going to devise a cover to fit the throttle body and see if this can eliminate or quiet it somewhat.

I have another noise question. Anybody getting a rattle noise from the drivers door area? When driving it sounds like the rattle is to my left and behind me.
Also, how is the fit of your doors in general? Ours were so poor you could actually put your fingers through the seal to the outside at the top portion of both doors. Freightliner has since adjusted them (there was much wind noise and air passing through seals) and are better but they could be adjusted even tighter...going to do this myself.

Thanks everyone! I'll update when try my "fix" of this noise.
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Old 03-04-2013, 11:40 AM   #9
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The noise you hear is going from shifter cable.There is a fix, my coach is at Freightliner being repaired.
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Old 03-16-2013, 12:13 AM   #10
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Can you give me more info? Exactly what the fix is (part number?) so I can be specific when I go back to Freightliner.


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