Can somebody share experiences, if a (lower) dogbone (insert) is mounted on a MK7 Diesel?
Is it better shifting?
Is there extra noise?
Just to let you know, I put a Powerflex diesel insert in my winter car ('15 TDI Sportwagen), and there's no increase in NVH whatsoever. No one riding in my car can notice it, even after I tell them about it. There was a barely perceptible vibration for maybe 2-3 days/200miles right after I installed it, but nothing nearly as extreme as you're describing.Update: driven about 600 miles, it's now okay at normal idle, not great. But running the A/C makes it feel the same as it did at idle right after install. In other words, not acceptable. This time of year in LA I don't need to run HVAC but I'll need it come summer.
My commute is less than 2 miles so I don't normally drive the TDI to work. My wife's commute will be about 80 miles round trip until May. Because she's awesome she has agreed to switch cars with me to try to break in the insert. I get to drive her Model 3 Dual Motor for a month... I suspect my 2 mile commute is going to be longer than 2 miles ?.
I'll post another update by the end of the month.
I had a 2010 Mk6 TDI /6MT that I put a BFI GTI dogbone insert in a couple months after I bought it new, it added a bit of vibrations, and within a week they were mostly gone. For the next 70k miles I drove it until VW bought it back,there was nothing more than the feeling of a clickety diesel engine, which is to say you wouldn't confuse it for a gasoline engine, but it wasn't anything like an old Mercedes.Interesting... It's definitely a vibration, as opposed to something interfering/touching. I'm stock emissions wise so there's plenty of downpipe clearance. I'm also stock with regards to engine/transmission mounts with the exception of the insert.
I had zero NVH issues prior to installing the insert. Besides the typical, but minimal, diesel engine sound there was nothing to note in that area. How would my engine/trans have become misaligned and what exactly do you mean by misaligned? Would you suspect it happened during the install of the dogbone insert?
If not during the installation of the insert I would think I should have had some minor NVH issues before, that are now be amplified by the insert. That being said, I also suspect the stock motor/trans mounts would be relatively soft, especially on a diesel.
To be honest I don't expect anyone would find the vibration I'm feeling acceptable. I'm more eager to pull the insert than my wife. Part of the reason she agreed to switch cars with me is so that I get a break from turning wrenches. I tried to explain to her that pulling the insert will take me something like half an hour start to finish but she was having none of it. At the same time everyone says not to get an insert on a diesel. No other user reports until yours to compare to so I figured everyone was right... maybe not. I would love to keep it but the vibration is a no go. It also resonates when the windows are down, downright unbearable.
I think you should be able to tell if the engine is misaligned just by looking at it from below, you could also use a prybar while you're there to move it around a bit and look/listen for any clunks to figure out what's touching it, but if you want to align it on stands you gotta make sure the car is level (use 4 stands, or stands & ramps).Thanks for the link and explanation, makes sense now. If you could grab some pictures when you're under your car again it would be much appreciated.
I don't have a lift but I've got stands. I may try to get the car up tomorrow and see if there's anything obvious (to my untrained eyes). Will take some pics too.
I would love to keep the insert in. With my current shifter setup it feels great to go through the gears.