Pictures? - PeachParts Mercedes-Benz Forum

Mike_Hawk · #1 05-13-2007, 06:28 AM

Hello all, I really want to get my car running well and know there are things to adjust and check. My problem is that I'm new to this world of MB's and diesels.

I want to fix my transmission's hard shifting. Sure, I've done the searches but no one ever includes pictures, so I'm left very confused. To make it worse, all of the pictures I've seen were for different cars and not my OM603.

BTW, where is the banjo bolt in my car, in relation to this: http://dieselgiant.com/mercedesaldaboostsystemservi.htm

babymog · #2 05-13-2007, 08:32 PM

If you have hard shifting, look first for vacuum leaks. Every vacuum line and connection should be suspect, use of a mity-vac to see if it holds vacuum is recommended.

Also, if your car is sluggish off the line, basically has no apparent boost until around 2500RPM or so, it might not be vacuum and transmission adjustments, but the fact that the pedal position is telling the transmission to shift harder for the power setting, ... you will need to search ALDA for how to correct that problem, usually 1-1/2 turns CCW is adequate.

BodhiBenz1987 · #3 05-13-2007, 08:42 PM

Quote:

Originally Posted by Mike_Hawk

BTW, where is the banjo bolt in my car, in relation to this: http://dieselgiant.com/mercedesaldaboostsystemservi.htm

Mike, our 603s don't have the banjo bolts on the overboost protection circuit. On the passenger side of the intake manifold, there's a nipple with a hose connected to it ... that runs into the bottom of a box on the passenger-side firewall called the switchover valve ... out of the top of that runs a line to the ALDA on top of the IP. Clean those puppies out ... or replace them ... the plastic line is cheap and can be bought by the yard at a dealership. Mine were brittle and snapped when I tried to clean them, so I replaced them. If your car is anything like mine was, you'll have black gunk in those two lines and all over the nipple on the intake mani as well as the switchover valve. Clean all that up and you may notice an increase in boost. Don't think that would cause any hard shifting, though ... like babymog said, check all vacuum lines for leaks.

I'll try to find some pics of the overboost circuit for you tomorrow ... I know I took a few and hopefully they are still on my laptop at home.

Brian Carlton · #4 05-13-2007, 08:58 PM

Quote:

Originally Posted by Mike_Hawk

I want to fix my transmission's hard shifting. Sure, I've done the searches but no one ever includes pictures, so I'm left very confused. To make it worse, all of the pictures I've seen were for different cars and not my OM603.

As Bodhi mentioned, you don't have a banjo bolt to worry about.

The hard shifting is caused by a vacuum leak.........on a 603, that's the only possibility. If you cannot locate it by eye.........no easy task.......you need a vacuum gauge..........usually found by purchasing a Mityvac.........which provides the capability of reading vacuum and also providing vacuum.

Once you own a Mityvac, we can find the source of the leak.

sasquatchgeoff · #5 05-13-2007, 09:15 PM

this is a great article with some pics and worth the read just to get a sense of the task at hand:
http://web.archive.org/web/20050223070652/www.babcox.com/editorial/ic/ic20242.htm

HTH

muleears · #6 05-14-2007, 07:22 AM

Bodhi,

I am far from an expert on these but aren't the nipple and switchover on the drivers side?

BodhiBenz1987 · #7 05-14-2007, 11:40 AM

Quote:

Originally Posted by muleears

Bodhi,

I am far from an expert on these but aren't the nipple and switchover on the drivers side?

Yes, they are most definately on the driver's side ... I have no idea why I said passenger. As I was typing it, I was picturing the driver's side, too.

Too many diesel fumes for me, I guess ...

Or too many long hours at work, bridal showers, running injuries and family shenanigans messing with my mind ...