OM603 ALDA removal instructions - PeachParts Mercedes-Benz Forum

scottmcphee · #1 05-26-2009, 09:03 PM

Quote:

Originally Posted by CANDIDE

I recently replaced the head on my 603 and found the 15psi pressure sensor totally clogged. If I were to rely on the sensor, I would clean and test it. The EGR really makes a mess of the intake manifold.
Where did you mount your gauge?

You're right, we're trusting the orifice in that 1.2 bar sensor, I haven't looked to see the size of the pressure pad / opening. It should be cleaned and tested... after 20 years.

..I plugged the EGR with a thin shim plate, it was a leaky EGR valve so unplugging the vac line did not finish the deed. This helps reduce soot build up, and it sure smoothed out my cold starts not having bad in the mix from the get-go.

I mounted the gauge under my wiper arm, on its flexible tubing. Right beside the mityvac under the same wiper. I thought things were fine until a light mist came along and unthinkingly I used the wiper on instinct. Doh! When not in use, I tuck instruments in under the hood near the brake booster.

I'm still looking for the right boost gauge. I don't want this 2 5/8" monster whole in my dash, have of the gauge is "vac". I want a pure boost only gauge for diesels... then I'll get out a drill and find a spot. Although, a stack of pods up the A-piller might be the way to go. A little ricey, gotta be careful with that one.

gsxr · #2 05-26-2009, 09:48 PM

Quote:

Originally Posted by scottmcphee

I don't want to crack the top off and twist the screw, I'd rather shim.. somewhere I saw a comparison of what one oil plug shim (same diameter and everything!) is equal to in turns-of-the-screw.

As mentioned in the first post, 0.75mm equals one turn of the screw. Just measure the thickness of the shim. If you don't have a mic, a cheap caliper like this one also works well.

Quote:

Originally Posted by scottmcphee

I'm still looking for the right boost gauge. I don't want this 2 5/8" monster whole in my dash, have of the gauge is "vac". I want a pure boost only gauge for diesels... then I'll get out a drill and find a spot. Although, a stack of pods up the A-piller might be the way to go. A little ricey, gotta be careful with that one.

Here's a pic of my gauge setup - additional photos are located here.

hellspcangel911 · #3 04-06-2010, 11:09 PM

Bringing this back from the dead.... quick question: with the ALDA installed stock, does flooring the throttle actually do anything? I cant start mine due to a leaky IP, Im thinking of removing the ALDA and flooring the throttle, then lots of cranking to get it running....
or does the ALDA only restrict fuel when the engine is already running?

Brian Carlton · #4 04-06-2010, 11:17 PM

Quote:

Originally Posted by hellspcangel911

Bringing this back from the dead.... quick question: with the ALDA installed stock, does flooring the throttle actually do anything? I cant start mine due to a leaky IP, Im thinking of removing the ALDA and flooring the throttle, then lots of cranking to get it running....
or does the ALDA only restrict fuel when the engine is already running?

The governor already "floors" the "throttle" when the pedal is depressed once prior to the start. The ALDA has no effect on this "flooring"..............

Clearly, you've got gassers on your mind.

whunter · #5 07-28-2011, 01:54 PM

for new members

87Bielenberg · #6 11-02-2012, 09:48 PM

The other day I had my injector lines off to replace one that was leaking and I adjusted the ALDA without removing it. Took the nut all the way off and turned the screw with needle nose pliers. If you are gentle, you wont damage the screw, it is very easy to turn. The only tricky part is being careful not to drop the nut. Im not sure if you could do this with the fuel lines still on. In my opinion tho, taking the 4,5,6 lines off is simpler than trying to get the ALDA off and back on. Enjoy!