diy motor mounts - PeachParts Mercedes-Benz Forum

survivor · #1 08-14-2009, 05:50 PM

I was wandering about what is the size and thickness of the board i will need to raise my engine to lift it and change my motor mounts?
I have a floor jack but dont want to hurt my oil pan.

Chad300tdt · #2 08-14-2009, 06:00 PM

I used two 2x4's cut a couple inches longer than the oil pan is wide. A 4x4 would work better if you have one.

survivor · #3 08-14-2009, 06:06 PM

Ok so one single 4x4 will ddo the trick.
thanks

pawoSD · #4 08-14-2009, 08:17 PM

I use a single piece of 2x4....or a thinner piece of hardwood.

emerydc8 · #5 08-14-2009, 10:57 PM

Would that be okay for an E420? I'm wondering if the added weight of a V-8 would test the structural envelope of the oil pan. Has anyone done the mounts on a 119.975 using wood and a floor jack?

survivor · #6 08-15-2009, 09:22 PM

i cant tell very well by that picture if the board goes across towards the bumper or from door to door.

Chad300tdt · #7 08-15-2009, 09:59 PM

It's going from door to door.

I put the front of the car on jack stands and removed the front wheels to give me room to get to the mounts comfortably. I replaced the engine shocks and oil cooler lines at the same time.

Chad300tdt · #8 08-15-2009, 10:09 PM

Quote:

Originally Posted by emerydc8

Would that be okay for an E420? I'm wondering if the added weight of a V-8 would test the structural envelope of the oil pan. Has anyone done the mounts on a 119.975 using wood and a floor jack?

The OM617 weighs 563 pounds. How much does the M119 weigh?

emerydc8 · #9 08-16-2009, 07:30 AM

Googled it for an hour to no avail. I suspect it's at least a few hundred pounds heavier than the OM617, but haven't been able to verify that.

280EZRider · #10 08-16-2009, 04:09 PM

Quote:

Originally Posted by survivor

I was wandering about what is the size and thickness of the board i will need to raise my engine to lift it and change my motor mounts?
I have a floor jack but dont want to hurt my oil pan.

The wood-under-the-pan thing is a MBZ method which is right in their maintenace library. So if no one knows about your particular engine, have a look there. My guess is that the V-8s can be lifted this way as well. Also keep in mind that you're not lifting the entire weight of the engine when doing this.

pawoSD · #11 08-16-2009, 11:23 PM

Quote:

Originally Posted by emerydc8

Googled it for an hour to no avail. I suspect it's at least a few hundred pounds heavier than the OM617, but haven't been able to verify that.

I highly doubt the M119 is much heavier than a 617....which is an entirely iron block/head diesel....very heavy for its size. The M119 has an aluminum head right? The engine probably weighs around the same or perhaps even less than a 617.

mramay · #12 08-16-2009, 11:56 PM

The M117 is 452 pounds and I'd expect the M119 to be less than 50 pounds heavier.

I use an 18" wide 2x6 on the pan to lift the engine. That pan is very thick steel, probably twice the thickness of my Chevy steel oil pans, and it will easily lift the engine (and if you forget to get everything loose, most of the front end weight of the car without distorting at all.

emerydc8 · #13 08-17-2009, 02:39 AM

Quote:

That pan is very thick steel, probably twice the thickness of my Chevy steel oil pans

Thanks. I actually deformed the oil pan on my 92 Chevrolet Z-28 by using the wood/floor jack technique to change motor mounts, so that's what made me ask the question.

I can't find the site now, but I recall reading that Porsche had to beef up the suspension and chasis of the 500E (which has virtually the same M119 engine as my E420) to accomodate the increase weight over the 300E engine. I thought I remembered reading that it was a few hundred pounds heavier than the 6 cylinder in the 300E.

Mike D · #14 08-17-2009, 10:48 AM

As much as I hate recommending HF there's THIS for a cheap price.

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=96524

$60 versus a collapsed oil pan, teeter-tottering boards on a floor jack, smashed fingers,...

280EZRider · #15 08-17-2009, 01:05 PM

Quote:

Originally Posted by Mike D

As much as I hate recommending HF there's THIS for a cheap price.

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=96524

$60 versus a collapsed oil pan, teeter-tottering boards on a floor jack, smashed fingers,...

I can understand why you hate recommending this thing, especially when a wide block of wood would do an even better job in view of the fact that the wood would support the majotity of the pan. The gimmic, on the other hand, appears to support just a small thin area.

Chad300tdt has the right idea about the wood support. A single 2x4 can flex too easily.