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Old 07-16-2008, 02:32 PM
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Engine mount question

I am in the process of trying to decide how to work out the engine mounting issue with my 56 F100.

Am I correct in my thinking that there are stronger rotational forces on the engine mounts rather that fore/aft or up/down? If so, then the portion of a mounting system that is welded to a cross member is stronger if it is triangulated in some way?

The reason I am asking is that I have found a mount that is designed for my engine, that replaces the factory insulator with one that has a simple round bushing that fits between two tabs that are welded to cross member. The pictures do not show any gusseting, so it appears that on each tab there would be maybe 1 1/2 inches of weld on each side of the tab.

I have also seen a mount that basically is a tube that a bolt would go through welded to two plates that when welded to the cross member actually creates a triangle of metal. Now, while this mount is for a different vehicle it may be adaptable to my project.

Thoughts and comments are appreciated.

Bill

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Old 07-16-2008, 04:58 PM
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Quote:
Originally Posted by v8muscle
I am in the process of trying to decide how to work out the engine mounting issue with my 56 F100.

Am I correct in my thinking that there are stronger rotational forces on the engine mounts rather that fore/aft or up/down? If so, then the portion of a mounting system that is welded to a cross member is stronger if it is triangulated in some way?

The reason I am asking is that I have found a mount that is designed for my engine, that replaces the factory insulator with one that has a simple round bushing that fits between two tabs that are welded to cross member. The pictures do not show any gusseting, so it appears that on each tab there would be maybe 1 1/2 inches of weld on each side of the tab.

I have also seen a mount that basically is a tube that a bolt would go through welded to two plates that when welded to the cross member actually creates a triangle of metal. Now, while this mount is for a different vehicle it may be adaptable to my project.

Thoughts and comments are appreciated.

Bill
As a structural engineer, I've seen a lot of automotive parts that scare me. Triangulated is always better than not. As for the loads on the motor mounts, the rotational (torque) load is seen as an up and down load on the motor mounts (one up, one down). The fore-aft loads are negligible unless you run into something.
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Old 07-16-2008, 08:12 PM
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Originally Posted by joe_padavano
The fore-aft loads are negligible unless you run into something.
Good one, Joe
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