1970 Challenger - K-Frame, Motor Mount Issue..

[72ls5fla]

Hey all ...

I have a very intersting thing goin on ...

On the DVR side, the bolt hole for the motor mount bolt in slightly elongated.
I am guessing this is to aid in alignment when installing the engine, to give soem "play" for mounting.
Here is what is going on..

I noticed that when I would (in 1st low) slam the gas, I would hear a loud bang and noticed the shaker bubble sharply roll over hard to the thud.
I figured maybe a bad motor mount.
Turned out that the engine was lifting the motor mount up until the bolt would hit the top of the elongated slot/hole.

Now this does not happen when just in 3/drive, must not be as much torgue or something,just in 1st.
I tighted the hell out of the bolt, worked okay for alittle bit and then the same thing started again.

How in the hell can I fix this short otf chaining the damn thing down???
Could I have a bad bolt?

really confused on this.

bill

[brads70]

Humm that shouldn't be happening as I'm sure you know. Are you sure the mount isen't seperated?
Maybe you should invest in one of these? I have one in mine and it works great!
http://www.engine-swaps.com/Pages/ProductsType/TorqueStraps.html

[72ls5fla]

the mount is not seperated.
I had a buddy do a power brake while I watched, I actually saw the whole mount pull up, bolt and all.

The PASS side has a regular old hole.  It is just big enough to get the bolt through.
Wish the DVR was the same.

Maybe the motor mount is shot under side where I can't see.

Thanks for input.

[BS CUDA]

Humm that shouldn't be happening as I'm sure you know. Are you sure the mount isen't seperated?
Maybe you should invest in one of these? I have one in mine and it works great!
http://www.engine-swaps.com/Pages/ProductsType/TorqueStraps.html

Torque strap indeed. I took Brads advice on this strap - works great, fits great. The car also doesn't twist as much when leaving the line.

[brads70]

Try putting a jack and a 2x4 under the side of the oil pan and jack up to see what happens?  You should be able to quickly see if the mount is bad?

[72ls5fla]

i will give that a try tomorrow.

i have a feeling it is going to be okay ---  but i would actually be happy if was bad.

will report back and let ya know...