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~~I have a ’13 Mustang coupe, v6, 6-speed as my daily driver. Ever since I have owned it I have noticed a vibration coming from the engine compartment when coasting. I thought it was one of those things that new cars have that go away with time. Well, it did not. After several months of paying attention to it and getting more uncomfortable with it, I took it to the dealer yesterday.
The symptoms are a vibration that begins at 2800 rpm when coasting downhill under part throttle. It lessens down to about 2200rpm where it fades away. It occurs in all gears and even with the clutch in. So it is engine related. No drive train.
The dealer checked it out and could duplicate it – thank goodness! They looked around in their magic problems/issues book and discovered that those symptoms occur naturally with v6 stick shift cars only. The book says 3500-2000 rpm. Turns out the flywheel is called a dual mass flywheel and the vibration is a result of the design. It occurs in all v6-6-speed Mustangs 2011-2014.
Wow! I have never heard of such a thing. Making an engine design that has a natural vibration in the normal driving range of the car. It is very disconcerting to me, so the car may not be long for this household. If you value your sanity, I would not recommend a v6, 6-speed.
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DOH !!!
I could have had a V8 !!!
I guess too many people liked the old V6 engines and they had to do something to them to make people want to get rid of them and buy a new car. This reminds me of the 1975 Buick I had with the odd-fire V6 engine.
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Yeah...remember the OLD /first V-6? GMC put them in a lot of trucks. What-a gas hog! Butt-den.....back then gas was 0.35 per.
6s6
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Vibration is an persistent problem in V-6 engines. Some that I have seen have a thing that looks like a mini shock absorber that goes from the engine to the frame, to dampen out the vibrations. That may have been on the '95 drop top Mustang I had with a V-6. That other car company that makes the Vortec V-6 uses a counter balance shaft that lies between the intake manifold and the lifters, driven off the cam gear.
How about the Jap cars with the V-6? Anybody heard of similar problems?
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MustangSteve wrote:
DOH !!!
I could have had a V8 !!!
I guess too many people liked the old V6 engines and they had to do something to them to make people want to get rid of them and buy a new car. This reminds me of the 1975 Buick I had with the odd-fire V6 engine.
Yeah. I went for the cheapo approach to getting a new car. 305hp v6 vs 450hp v8. The power is fine.but the sound sucks and that vibration is discomforting. Next time I will pay the extra $10,000 and get the v8.
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lowercasesteve wrote:
Wow! I have never heard of such a thing. Making an engine design that has a natural vibration in the normal driving range of the car.
It could be a matter of robbing Peter to pay Paul so to speak. It's possible the balancing\damping arrangement that gives you that part throttle\coast down vibration may also make that engine buttery smooth at 7K.
My wife's 09 Edge has a 265HP version of that engine, and while it doesn't grunt down low, it pulls like a rocket at high revs, and is liquid smooth all the way to redline. There is no vibration of any kind, but then, this car is an automatic.
John
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I get the same vibration when rpm is reducing around 2800. But, it always disappears immediately when i push in the clutch.
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