Cheap engine shock mounts fix
 

Hey everyone. Recently was replacing the engine shocks on my 300sdl. The strain from the new shocks actually doing there job unlike the old worn ones caused my engine shock mount rubber that was dry rotted to pull out and seperate completely from the mount. Was stunned by the 275 dollar per mount price tag. Finally got a suggestion from a fellow member (thank you diesel911) to use a pourable mouldable urethane resin called flexane or devcon. Looked into it more and decided on the flexane 80. There are different numbers with 94 being the highest and least flex down to something like 64 with a lot of flex. I bought the smallest kit available which was the flexane 80 pourable one pound kit. Cost about 65 dollars and have a ton left over. Here is the process i took. This mount looks like new and works exactly like a new almost 300 dollar mount. For $65 investment and that will fix both sides with tons of the kit left i am very happy.
1. Removed the engine shock mount from vehicle.
2. Cleaned all old rubber from the metal mount with knife, etc and bring down to metal with steel wool
3. Once down to bare metal and no rubber left i cleaned metal with degreaser and brake clean.
4. Used digital scales to measure out the mixture of resin and hardener. Ratio is 77-23 or about 4:1. I used only 1 ounce resin to about .25 ounce Jet for one side or 2 ounce to half ounce for both sides.
5. Mixed for around 3 minutes and pour the urethane into the metal mount.
6. Used a hair dryer on low to blow on the resin for about 10 minutes to bring all air pockets to surface and out of the mould.
7. Let it set for at least 24 hours. Recommends 2 days in box butt seemed well hard enough to drill. Says is at 80 percent cure in 48 hours with max cure coming at 7 days...however if u want to speed the process it says you can cure for one day then cure for another day at 150 degrees (i used a toaster oven) for another 24 hours to achieve a full cure
8. Used a drill press to drill hole for the shock to come thru the mount.
9. Installed back on mercedes.

This was a very simple process and with only 70 total in materials for 2 mounts versus the around $550 for both sides to buy the mounts i am more than pleased. This resin is actually made for this type use and works very well. I did some research and found people making engine mounts for 1000 horsepower cars, making old impossible to find rubber mounts, etc. I hope this helps some people out and maybe save some hard earned cash to put towards other maintenance on these lovely machines.

Where do you get the engine mount price tag for $275? A quick search for the same mount part # 1232413013 is $16. The cheapest one is $8.36. I would not go that route unless we are talking about different entities.

That is an engine mount not an engine shock mount. Hugr difference. Do aquick search and u will see what i am talking about.

I used urethane in my motor mounts. These are for my engine swap project (OM617 into a 380SL) I used a new set of the fairly inexpensive new mounts and then poured urethane to support and prevent collapsing and separating of the mounts over time. This was mainly for the additional engine weight and because I was a bit tight on subframe clearance and this is my insurance. These mounts were subsequently drilled out to provide for the mounting bolts.

http://www.peachparts.com/shopforum/...roject-a01.jpg

Here's a stock "unfilled" motor mount for comparison.
http://www.peachparts.com/shopforum/...roject-a03.jpg

In my case I'm expecting a somewhat harsher ride, but so far the vibration seems entirely acceptable (although my experience is based on the first once around the block test drive just this week)

I can see where urethane might be a solution as you've used it for the engine shocks too. There are lots of uses for urethane and it is extremely easy to use and relatively inexpensive.

Do you have pictures?

Yes i took a couple pics will post them within a day or so. And i agree very easy to use and inexpensive. Will be using the money saved for some new rear springs as mine are pretty worn. Cant tell you enough how easy this was and cheap

What is the part #? They must be gold plated to cost that much.

1262410113 peach parts part number. No that is the going price for an engine SHOCK mount. Like i said check online this is nothing like an engine mount. The 300sdl engine SHOCK mount seems to be the most expensive of all the diesel engine shock mounts probably from the extra cylinder and power it has to deal with. Do a google search ah-kay on 300sdl engine shock mount and you will see a clear difference. Even the w124 engine shock mounts are pricey about 150 or so it seems. So this flexane kit could also help with w124 engine shock mounts i don't know for sure though

http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=1262410113&x=7&y=8

http://www.pelicanparts.com/Mercedes-Benz/index-SC.htm

link to where you bought the stuff please :)

Wow, I do not expect a small engine shock mount to be so expensive. I am pleased that you can improvise with resin to fabricate one. May be I try to grab one if I see a SDL in the JY. It is also possible to cross check with different cars to see they use the same part and pull it from JY also. The part does not look particular difficult to manufacture to me. Why it is so expensive is beyond me.

A job well done.

Very cool Cuban mechanic fix. I wasn't aware that this was possible. found this tutorial for a similar product on youtube

Tutorial on mixing and pouring a 75 shore A urethane elastomer - YouTube

That's the product I used for my motor mounts. They're located here in San Diego, so I was able to just drop by the warehouse and pick up what I needed. They also carry epoxy which I've used on fiberglass projects in the past.

[Full disclosure: I have nothing to with the company, just a satisfied customer]

The belt shock on 606 engines usually fail from the lower rubber bushing giving away but the shock remains perfect, This looks like a good remedy for that problem too.

I am glad it all worked out for you!

I was a little bit worried about suggesting a Product that I had no experience with.

But, as you said the other internet sites gave a good idea as to what the Flexane (made by Devcon) could be used for.

Well i am very glad you suggested it. Saved me a ton of money and works and looks like the factory part. Cant be happier thanks again diesel911