Do I have broken motor mounts?
How to determine if your engine mounts are bad: Open the hood. Have a second person start the engine, apply the parking brake, on vehicles equipped with automatic transmission press brake pedal with left foot, shift the transmission in to 1st gear or DRIVE, give the engine a LITTLE bit of gas. Watch how much the engine twists in the engine compartment. The amount of twist should be very little if your engine mounts are in good condition. Keep in mind that the amount of twist that you see is only a sample of what is really happening when the car is being driven, and even more so during rapid take-offs from a stop.
Many drive train problems can be traced back to worn or broken engine mounts.
- Excessive engine movement under acceleration or deceleration which can cause interference between engine mounted components and engine bay mounted components.
- Excessive shifter movement on manual transmission vehicles. The transmission is bolted to the engine, so if the engine is allowed to twist in the engine compartment, this misalignment will be transferred to the transmission shifter which may put the shifter linkage in a bind causing missed shifts. Excessive shifter movement may also be just plain annoying to some drivers.
- Wheel hop under extremely hard take offs, wheel hop is caused by many variables, but boils down to drive train components flexing under load (Look around on the web for specific causes and remedies of wheel hop)