Motor mount bolts keep breaking off

To change the motor mount driver's side of a 2004 Chrysler PT Cruiser, you will need to follow these steps:

1. Raise the vehicle: Use a jack to raise the vehicle off the ground and support it with jack stands. Make sure the vehicle is securely supported before proceeding.
2. Locate the motor mount: The motor mount is located on the driver's side of the engine compartment, between the engine and the frame of the vehicle.
3. Disconnect the negative battery cable: This will help prevent any electrical issues while working on the vehicle.
4. Remove the engine mount bolts: The motor mount is held in place by bolts that attach it to the engine and the frame. Using a socket wrench, remove these bolts.
5. Remove the old motor mount: With the bolts removed, the old motor mount should come loose. Carefully lift it out of the engine compartment.
6. Install the new motor mount: Place the new motor mount in position and align the bolt holes. Insert the bolts and tighten them to the manufacturer's specified torque.
7. Reinstall the battery cable: Reconnect the negative battery cable and test the engine mount for proper operation.
8. Lower the vehicle: Carefully lower the vehicle to the ground and test drive the vehicle to ensure everything is working correctly.

It's important to keep in mind that this is a general guide and the steps may vary depending on the specific model and year of your vehicle. It's best to consult the vehicle's service manual or seek the help of a professional technician. It's also important to use the right tools and safety equipment, such as gloves, safety glasses, and jack stands.
Also, it's important to note that changing a motor mount can be a difficult task and it's best to have a professional technician perform the repair.

This does sound like the problem is more than just the front front motor mount

it could be the problem and it could be that you need a harder tensile bolt ,if you undo all the bolts on the engine mounts it could be that the motor is not sitting right in the frame .if you keep getting the problem you might need to get the frame checked cheers pete

Check your motor mounts on the sides of the engine. Make sure the mount brackets on the engine block are still in place.

Maybe the drive belt is to small and pulling on the assembly, and in turn pulling enough to break the bolt. probably is fine when idle, but under load the condition changes, causing tension to be applied and snapping the bold. That would be the first place I would look.

I have also had other bolts come out of other assemblies and everything ran fine. Until one day when it didnt and belts snapped and so did bolts as and my transmission. It wasnt a good day. So check your belt alignments, mower deck bolts, spring placement, rear end bolts, etc. Good Luck!!

No it wont. Use a jack to keep the engine lifted. remove the mount, change the belt. you may have to wiggle or pry the engine back to get the bolts in, but it will not hurt a thing. Just pry on something that wont break.

That head bolt is guide to help align the motor mount. Once all the bolts are removed that hold the mount to the engine you will be able to wiggle and pry it off of that alignment bolt.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

It's your motor & transmission mounts - relatively inexpensive.
Here is where you can get all 4 mounts for your car - AUTOMATIC transmission: http://dodge-car-parts.yogiautoparts.com...
If you feel like reading, here is a bit of information about the function of these mounts on a car:

The purpose of engine motor transmission mounts: Most mounts made of metal and rubber, many newer model mounts are filled with hydraulic fluid, some advance hydraulic mounts come with electronic variable speed control by ECM engine control module. The basic design are the same to support between engine, transmission and subframe. They work hard to keep engine and transmission running smooth minimizing the amount of rattling and vibration from acceleration and stops. At the same time mounts are supporting all major power train systems keeping all mechanical components in balance level and position. Motor mounts are extremely important vehicle parts that stabilize and align a vehicle engine inside the engine compartment. Although small in size and relatively cheap in cost, motor mounts can cause tremendous mechanical problems if they break or go bad. Engine motor mounts are small parts that are used to stabilize and properly align a vehicle engine. When motor mounts go bad, they can cause a variety of symptoms, ranging from mechanical damage to excessive engine noise.

Check the starter and see if there is a provision for a front or top brace. most starters have them and that part is often discarded on the first replacement. (should be a small "L" bracket) between the starter motor and the block. You could try using grade 8 mounting hardware but if it snaps again they will be more difficult to drill.
I'd also start looking for a reason there is so much stress there, otherwise even if the bolts do not snap, the nose of the starter will shatter. One possible cause of that is an engine mis-fire during starting, due to a bad ignition wire, cap or rotor.
Likely you can get a pair of oem bolts and possibly even the bracket for cheap at any scrapyard.

On the Ironhead Sportster, the top motor mount bolt that goes through the frame is usually a 1/2 inch bolt. I'd use a grade 8 fine thread bolt with a nylok nut on it. Make sure you "shim" the top motor mount to the frame with the appropiate amount of washers so as not to "torque" the frame. If you do, either the top motor mount or the tab on the frame will break from the torque and vibration.