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Clearance for engine movement

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Old Aug 20, 2011 | 03:22 PM
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Default Clearance for engine movement

I am working on putting an LS2 into an old car. The engine is in and mounted using Mopar offset motor mounts everything lines up good but there is one section where one of the front mounting points on the drivers side comes very close to the steering box mount.
Clearance for engine movement-engine-clearance.jpg
The distance is about 10mm

I have two questions
When the engine is under load what direction will the engine move? If it rotates towards the drivers side I suspect this will hit. If it rotates towards the passenger side it should not be a problem.

What is this mounting bolt used for? Any problems just machining it off of the block?

I have some heavy duty rubber that I could put in there to cushion the contact but I really don't like that Idea. The mounting point in the car is pretty much immovable without major modifications to the chassis. I can move the engine back about 3/4" to clear this but this makes the headers fitment a major hassle because of the cars foot boxes.

Any advice is appreciated.
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Old Aug 20, 2011 | 05:25 PM
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What type of motor mounts do you have?

If they are urethane than a half inch of clearance should be good to go.
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Old Aug 20, 2011 | 05:48 PM
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Default They are plain rubber mounts

There just plain rubber mounts. I looked for them made out of urethane but could not find a source for them. If anyone knows where to get them in urethane please let me know.

Here is what they look like.
Clearance for engine movement-mount.jpg

I found these mounts, they are not urethane but should sufficiently limit movement.
http://www.mitymounts.com/chrysler.htm

Last edited by debreshnev; Aug 20, 2011 at 06:20 PM.
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Old Aug 20, 2011 | 09:33 PM
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With OEM type mount, I would expect the follow in General...

The motor well try to rotate (facing it from the front) Counter-clockwise. The driver side tends to try to ride upward and over to the passenger side while the passenger side will dip a bit. It should not really move too much unless the mounts are really old.
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Old Aug 20, 2011 | 09:48 PM
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Default thats what I needed to know

BCZEE, thanks that is what I needed to know. Since it will be rotating the other direction I don't think it will contact the frame.
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