Engine Mount Replacement
How are engine mount issues diagnosed?
Diagnosing engine mounts is not necessary in all cases, as some vehicles are scheduled for motor mount replacement as part of the factory scheduled maintenance. For most other vehicles, the motor mounts will be evaluated for the amount of travel they allow the engine, if the engine is listing in one direction, whether they have physical damage or leaks, and if they produce vibration or noises in the cabin. If any obvious symptoms are present, the engine mounts will be identified if they are causing the symptoms. Some manufacturers publish specifications for positioning engine and transmission mounts, and failure to adhere to these specifications, or the engine mount gradually shifting out of position, will lead to engine vibrations felt in the cabin, and possible premature engine mount failure. If the technician notices the engine mount appears to be failing, but is installed incorrectly, they may recommend correcting the installation, and testing the existing mount.
How is an engine mount replaced?
Replacing engine mounts requires proper engine supporting equipment. The technician will place the engine support tool across the top of the engine bay, and secure the engine in place. Then, any obstructing components are removed, and the motor mount is removed, given one more final inspection, and replaced if needed. Once the motor mount is replaced, it is checked to confirm proper alignment specifications have been met, and the fasteners will be tightened to specification. All removed components will be reattached, and the vehicle will be tested to ensure the customer complaint has been corrected.
RepairPal Recommendations for engine mount issues
When changing an engine mount at home, never support the engine with a jack or jack stand. The weight of the engine sitting on the pinpoint head of a jack or jack stand can puncture the oil pan, or crack other components. The engine should be supported by an engine brace from the top.
What to look out for when dealing with engine mount issues
OEM engine mounts are generally more expensive, but aftermarket engine mounts may not meet the specifications of the OEM mounts, and vibration can result. When it comes to engine mounts, you get what you pay for. The original equipment manufacturer mounts are usually the best option, though there are some excellent choices in the aftermarket.
Can I replace the engine mount myself?
Replacing engine mounts is dangerous, and engines are extremely heavy. There is a risk of being crushed by a falling engine, and crushing a hand between the engine and engine mount pedestal. If safe engine supporting methods are not clearly known, or proper engine bracing tools are not on hand, this repair should not be attempted, and a professional technician with appropriate equipment should complete the job.