Pinned Motor Mounts

After separating a motor mount again I knew I needed something stronger than stock motor mounts. I'm thinking they are making mounts with different rubber than they use to or the manufacture procedure is different. Something is up. All I know they don't last as long as they did years ago. It looks like with today's technology they know how to make a motor mount that doesn't pull apart without you doing a basic backyard fix. For what its worth, as always anything made with metal I will buy from a quality part chain, not from a discount auto part franchise.


Separated motor mount

I hear that the '69 Bronco mounts have torque limiters or pins going though mount that limits the movement of the engine. The draw back is this motor mount will also raise the engine in the bay approximately 3/8 to 1/2 inch. This might be acceptable if used in a ’64-‘65 Falcon, but the ’60 Falcon having the smallest transmission tunnel needs all the room it can get with a V8 bellhousing. It should be noted that the 260 V8 has a 6 inch bolt span and the 289-351 has a 7 inch span. So if you have a 221 or 260 forget about using Bronco mounts.

I didn't want the harshness of solid motor mounts on a street driven car.  Other than the cruelty of this type mount the vibration from the engine will eventuality take its toll on other parts. 

I remembered seeing something very similar to this modification in an old Hot Rod magazine years ago.  This modification not only keeps the motor mounts in one piece, it will also put more torque to the driveshaft by eliminating the flex in the OEM mount that is lifting the engine when it is rev.  It will make a more responsive drivetrain that will responds crisper to throttle response. You also gain less wheel hop, not to mention less chances of the headers hitting the shock towers due to the engine twisting.  With this modification I can now  have almost the smoothness of rubber mounts and the strength of solid.  I can feel a very slight vibration with the mounts being pinned, but it is not enough to to be concern it is something that was expected.

 **Click on thumbnails for bigger pic**

New motor mounts Drill 2- 25/64" holes in each mount Counter sink the holes
     
3/8"x 1 3/4" Stainless
Flat Head Cap Bolt
Using Loctite tighten nut until the bolt
starts to spin plus an extra 1/4 to 1/2  turn.
Grind the bolt head flush with mount
then paint mount to deter rust

 
 
 

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