Hello,
I am having some frustration, and I need the collective help. I am trying to fix my friend's 2005 Mitsubishi Eclipse. It suffers from vibrations at idle speed. The entire cabin vibrates when the car is in drive, but not in neutral. When you switch from neutral to drive, the entire engine sways like 10 degrees counterclockwise (facing the front of the engine, FWD 2WD car). I replaced the easiest and worst condition mount, the front mount, but it didn't improve the vibration. The old mount was obviously bad: torn rubber, could easily remove the old rubber insert by hand etc.
But the rear mount, responsible for allowing the engine to rotate 10 degrees, is much harder to tell if it is bad. It sits by the firewall, beneath the intake manifold. A large metal plate is blocking view of the rubber insert. I took a video of the rear mount yielding to the engine sway when shifting to drive. The rubber obviously shifts position. But I can't tell if it is torn.
I am pretty certain the passenger side and driver side mounts are bad. These have torn rubber, but I don't see how these would be responsible for allowing the engine to rotate 10 degrees, because these are literally on the axis of rotation. Could these be responsible for vibration?
My question is this: what are the odds that replacing the rear mount will fix the cabin vibrations? Is this an engine tune-up issue or a mount issue? The owner took the eclipse to a mechanic prior to me and said all 4 mounts needed to be replaced. I am just trying to fix the vibration, not the engine swaying:
I'll post a link to video in a sec...
I am having some frustration, and I need the collective help. I am trying to fix my friend's 2005 Mitsubishi Eclipse. It suffers from vibrations at idle speed. The entire cabin vibrates when the car is in drive, but not in neutral. When you switch from neutral to drive, the entire engine sways like 10 degrees counterclockwise (facing the front of the engine, FWD 2WD car). I replaced the easiest and worst condition mount, the front mount, but it didn't improve the vibration. The old mount was obviously bad: torn rubber, could easily remove the old rubber insert by hand etc.
But the rear mount, responsible for allowing the engine to rotate 10 degrees, is much harder to tell if it is bad. It sits by the firewall, beneath the intake manifold. A large metal plate is blocking view of the rubber insert. I took a video of the rear mount yielding to the engine sway when shifting to drive. The rubber obviously shifts position. But I can't tell if it is torn.
I am pretty certain the passenger side and driver side mounts are bad. These have torn rubber, but I don't see how these would be responsible for allowing the engine to rotate 10 degrees, because these are literally on the axis of rotation. Could these be responsible for vibration?
My question is this: what are the odds that replacing the rear mount will fix the cabin vibrations? Is this an engine tune-up issue or a mount issue? The owner took the eclipse to a mechanic prior to me and said all 4 mounts needed to be replaced. I am just trying to fix the vibration, not the engine swaying:
I'll post a link to video in a sec...