Mercedes-Benz Forum - Reply to Topic
Topic: M103 Rough idle and vacuum leak Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
04-15-2019 10:33 PM
tusabes
Quote:
Originally Posted by codycool55 View Post
Definitely the Bosch Distributor. I had an off brand that wore out very quickly.

So far this winter my car has been much more reliable than previous years. I've had no problems with cold starts or stalling. I only drive it once or twice a week around town. Being a college student money has been tight and I haven't been able to afford to try another eBay EZL, but I will when I can.
Ebay offers free returns even if the seller doesn’t . You should never lose a penny by buying in ebay if the part doesn’t work . Ebay will refund you in full as long as you mail it back and will usually even give a prepaid return label
04-15-2019 06:01 PM
codycool55 Another eBay EZL and another return..
12-16-2018 09:29 AM
wooky_chew_bacca I've been using it more and more lately to prevent / cut down on corrosion of contacts and such. Used on battery terminals there is almost none of the white crap build up that eventually causes electrical problems and "no starts"

I've also been using dielectric in switches I "rebuild", greases and cuts down on corrosion inside
12-16-2018 08:03 AM
Strassenkreuzer
Quote:
Originally Posted by wooky_chew_bacca View Post
Yes, use it kinda like a "sealer" to keep moisture in the air out and it helps seal the rubber to the cap without it getting stuck (we've all had to deal with that)
Thanks, wooky. And interesting. I figured any grease of any sort would impeded conduction, but I guess that's they call it "dielectric". Does it make sense to put the grease on the metal contacts of both ends of the wire—the cap end and the spark plug end?
12-16-2018 06:24 AM
wooky_chew_bacca
Quote:
Originally Posted by Strassenkreuzer View Post
I have some of that. Do you mean use a cotton swab and put it on the metal contact inside the plug cap? This grease in no way impedes electrical flow, eh—but it impedes corrosion? If so, then I'll use in on all of the cap wire leads.
Yes, use it kinda like a "sealer" to keep moisture in the air out and it helps seal the rubber to the cap without it getting stuck (we've all had to deal with that)
12-15-2018 12:14 PM
H.D.
Quote:
Originally Posted by Strassenkreuzer View Post
... So, looking at the distributor cap from the front of the engine, the left-most connector is cylinder 1 and the right most is 4?
And what I meant above is the physical cylinder location of the engine when looking at the block from the right side of the car: From front to back, it's 1-2-3-4-5-6. Or is 6 at the front of the engine? ...
You find the cylinder numbers on the cover that goes over the distributor cap. … The physical cylinder location from front to back is 1-2-3-4-5-6.
12-15-2018 11:40 AM
Strassenkreuzer
Quote:
Originally Posted by H.D. View Post
No. …


The firing order is 1-5-3-6-2-4 … starting from the ignition distributor.


That mechanic in Florida was right … non-resistor copper-core plugs for the M103. … Install them with a torque of 20 Nm … and don‘t forget to clean the recesses they sit in (best with compressed air) before you remove the old plugs.
Thanks. So, looking at the distributor cap from the front of the engine, the left-most connector is cylinder 1 and the right most is 4?

And what I meant above is the physical cylinder location of the engine when looking at the block from the right side of the car: From front to back, it's 1-2-3-4-5-6. Or is 6 at the front of the engine? Or am I all wet on this entirely. And the numbers correspond strictly in line with the firing order...
12-15-2018 10:28 AM
H.D.
Quote:
Originally Posted by codycool55 View Post
... Being a college student money has been tight and I haven't been able to afford to try another eBay EZL, but I will when I can.
Take care of that as you may see fit … and don‘t put college in second place. …

H.D.
12-15-2018 10:23 AM
H.D.
Quote:
Originally Posted by Strassenkreuzer View Post
... Is it normal for these caps to corrode after just a year or two? ...
No. …

Quote:
Originally Posted by Strassenkreuzer View Post
... How does one determine which cylinder the distributor contact addresses? Of course I can trace the wires to the block, but is the cylinder order like 1-2-3-4-5-6 starting from the firewall? Or is it the other way around? ...
The firing order is 1-5-3-6-2-4 … starting from the ignition distributor.

Quote:
Originally Posted by Strassenkreuzer View Post
... I'm going to replace my spark plugs; I was told by a mechanic in Florida that M103s don't like fancy plus and instead to use high quality, copper-core plugs like were OEM spec'd back in the 80s. What kind of torque do they require? ...
That mechanic in Florida was right … non-resistor copper-core plugs for the M103. … Install them with a torque of 20 Nm … and don‘t forget to clean the recesses they sit in (best with compressed air) before you remove the old plugs.
12-15-2018 07:48 AM
Strassenkreuzer
Quote:
Originally Posted by codycool55 View Post
Definitely the Bosch Distributor. I had an off brand that wore out very quickly.

So far this winter my car has been much more reliable than previous years. I've had no problems with cold starts or stalling. I only drive it once or twice a week around town. Being a college student money has been tight and I haven't been able to afford to try another eBay EZL, but I will when I can.
Thanks, Cody. I'll buy the (twice as) expensive MB part over the Bosch—though I suspect the Benz-labeled one will have been manufactured by either of Bosch or Beru. Hope all's well with your project.
This thread has more than 10 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome