One of the better reasons to change your motor mounts (pics) - PeachParts Mercedes-Benz Forum

#1 08-31-2004, 05:25 PM

Here are some pictures. Its pretty self explanatory
*tear* off to get new oil lines at Halsey Import...
AND motor mounts.
I drove it about 4 miles with this oil leak...watching the oil pressure drop. I heard the inital hiss but figured I missed dodging some crap in the road. I knew the motor mounts were BAD but sheesh. Guess they and the seeping oil likes creeped up on me. THe trusty bug comes back into service :-D

Please no slaps on the wrists...yesterday, when this happened, I was coming home from my birthday dinner :-/
Time to get dirty.

Old300D · #2 08-31-2004, 06:44 PM

Good luck with that mess!

#3 08-31-2004, 06:47 PM

And it was all so spotless just a day ago
*sigh*
I plan on upgrading that pump too...probably most the reason that motor mount ate itself.

psfred · #4 09-01-2004, 12:28 AM

Yeah, that mount was well and truely squashed. Eliminate the oil dripping on it (power steering fluid?) or the new one will look like that pretty fast.

Bet it idles a lot smoother when you are done, too!

Peter

gsxr · #5 09-01-2004, 12:55 AM

Aaargh. Oil cooler lines are one of the worst jobs on a 617. (Actually there are a lot of really annoying jobs on a 617... like the starter, and alternator, and motor mounts... I'll stop there.)

BTW, the later OM602/603 turbo engines with oil coolers route the lines in such a way that this cannot happen. One more reason to move up to the newer chassis when funds permit! :p :p

Repair tip: Degrease engine first. Pull the old motor mount out. Replace both oil cooler lines (not just one). Then install the new motor mount. Might wanna consider doing the other motor mount too, it's probably shot as well. Having the mount out of the car makes the oil cooler line job a lot easier, IMO...

Hatterasguy · #6 09-01-2004, 04:02 PM

Wow what a mess, at least you stopped before you lost all of the oil! I would check that belt to, the heat from cutting into the hose might have messes it up. Also make sure to get the OE oil cooler hoses.

Look at it this way gsxr at least their oil cooler lines don't cost $351!. Not to mention they usually take out the threads on a $256 oil cooler as well.

gsxr · #7 09-01-2004, 04:23 PM

Eeeek! Are they that much for the 603 cars? Ouch. So far it seems to be a very rare failure, thankfully... I think I've heard of *one*, maybe? On the 617's it's frighteningly common...

#8 09-01-2004, 04:26 PM

Yep doing all motor mounts, all belts (oily belts don't work good), and both hoses..
I am going to cross my figners as I take the fittings off the cooler...
Luckily...my dad is a mechanic so I got a nice plethora of tools to play with and lots of growing up experience to keep me out of too much trouble

and that was the primer pump leaking on that motor mount...got that ordered...
Probably do my tranny filter why I am down there...its just sad though cause the thing doesn't leak a single drop of ATF anywhere. Got the filter/gasket kit for it.
anyone want pictures? if so..I can take some.

Hatterasguy · #9 09-01-2004, 05:02 PM

Common on northern cars, my crimps down by the cooler rusted threw. However MB did update the hoses, the new ones have aluminum fittings that should not rust or get stuck on the aluminum cooler.

Pete Burton · #10 09-01-2004, 05:34 PM

Yeah, but now you are less likely to get rust on your engine block. I have to go and wipe mine down where it's starting because I cleaned it with alcohol. You have a nice, rust protecting mist automatically applied. Seriously, I don't think the job is too bad, just follow gsxr's avvice and degrease it first

#11 09-01-2004, 06:34 PM

I plan on minor cleaning in the areas I need to do the work (me and oil get along alright) and then once i Get the car going I will take it down to the pressurewashing place here in town and clean the rest out..
figure it will leave behind enough residue to keep things from rusting but take off enough oil to make the engine all clean again..
btw thanks for the advice I am getting. been crusing the forum doing searches to make sure all goes well

tjohn · #12 09-02-2004, 09:37 PM

As long as we're playing "while you're in there," If you ever planned on setting the IP timing, I'd definitely do it while you have the engine jacked up to replace the mounts. The nut on the back of the IP is much easier to reach at this time, making the job a whole order of magnitude easier. Not that you don't have enough to tie you up for the weekend, but hey, you've got three days...

Hatterasguy · #13 09-02-2004, 09:56 PM

Is it just me or do these cars seem to suck up weekend's well.

gsxr · #14 09-02-2004, 11:56 PM

Yeah - I try to get most of my tinkering done in fall & winter, when the weather is decent, and while I'm driving my winter beater. Then I can relax and just DRIVE the car in spring & summer! (That's the theory, anyway.)

:p