jondaboll

NEED HELP PLEASE 109 e 2.6 1992
My car got hot in traffic and the overflow hose from the reservior broke and anti freeze went all over the motor. Not being careful enough I got water in somthing because it was not running on all 6. So I started taking different items , un plugging and drying them and put everything back as I was going .Now my car does not start. Sounds like it is trying to caugh . does not even want to start. There is a plug on the valve cover in the back that has four female ends. Is there a certian way that plugs in or is it universal? The distributer cap looks like it is crackied. I loosened the allan bolts on that, Did I mess it up to.Besides not getting any response on help for my overheating problem . I now have accomplished more work. I usally take the car in. Have not worked for 6 months. Thought I could tackle this myself.

vinamg

The 4 pin plug is a coolant temp sensor for the CIS. It doesn't matter how it plugs in and it has nothing to do with your car not starting.

Was the distributor cap removed on the initial 'unplugging and drying'?
Did you remove the distibutor cap with the cables still attached?

mctwin2kman

I am thinking your plug wires are out of order! Make sure you have the correct firing order and plug wires in the correct order on the cap!

jondaboll

Thankyou! Is there a manual out that you would suggest for me? Thats what I will do is check the plug wires. I marked them so I am pretty sure that I got them back in order. But will check this A.M. I did not remove the distributer cap with the plug wires still on, I just loostened the three allan bolts and tightened them back up. Do you think the cd (manual is ok ) I have to change out this Water pump. I Have a leak under it cant pin point leak but it looks as if it is coming from one of the bolts under the pump? Thanks for your input.

jondaboll

Thanks! I will check the firing order as soon as I can find some tech manual to guide me. Any suggestions? Thank you

mctwin2kman

The firing order should be on the cap!! Just make sure that when marked 1 it goes to 1 and so on and so forth. They are not in numerical order on the cap! They are in there firing order! The firing order is also on the plastic cover that goes over the wires if you have it! As for a manual! Look for the MB Maint CD. You can find them on E-Bay for around 20 bucks I think. Also some websites sell them as well. I think PerformanceProducts is one!

jondaboll

Cool! Thanks so much, I saw the order on the plug wire management tray thay fits on the valva cover. the plastic cover that goes over the distributer sure is cracked and pieces broken off. Probably should replace that. Again thanks I will go to work on it . Check ebay for the CD also.

vinamg

1 should be top right (when viewing from front). Go clockwise and follow firing order 1-5-3-6-2-4

If you still can't start it remove the cap (make sure to disconnect wires) and check the rotor contact on distributor cap. There is a possibility that you cracked the contact.

vinamg

BTW, you need to replace the water pump. The leak is from the weep hole. The pump is designed to leak through there when the seal fails.

Not an easy task for a simple DIYer. You need to remove fan shroud, engine fan, belt tensioner,....

There is also a special tool for the hard to reach water pump bolts.

jondaboll

I can see that it is going to be difficult .Not working so I need to do it myself. You Said the weep hole! Do I just need a new Seal maybe?I am allready into it Just getting ready to pull the radiator. I am going to buy a repair CD. Is the a good reference. Took several pictures and ready togo. Should I replace anything else while I am doing this? Thanks again, You are very helpful.

vinamg

No, you need to replace the whole pump. The cost is about $85-$150 with exchange. Try Hoehn or Caliber motors.

mctwin2kman

The pump is fairly straight forward once you get the radiator and other crap out of the way. And yes it should be replaced.

As for the Main CD. It is the exact CD that the MB Tech's use to diagnose and fix stuff. It is MB's CD! So yeah it is the best resource to have!

Benz Lover

Let see...so you say you live in PHX? I lived there for like 7-yrs and lets see from my experience it gets damn hot there. I have a few Q's :

How long have you had the benz?
Are you driving it in PHX?
How many miles on the car?

I would make sure that you always have sufficient oil in that engine..esp. out in the desert.

MaciekPL87

I got to those bottom bolts with a uni-joint and 2 extensions =)

Maciej
'92 190E 2.6

jondaboll

Thanks for all the very useful help. I got car started I did have the wires crossed! The Water pump job is going. Cant get that one bolt off. Almost ghet to it with what I have in tools. I will go down and buy another type of swivel extension and see if that does it unless There is any suggestions. As you can tell! I am not a mechanic, But think That things are going well, thanks to all of you.

jondaboll

Thanks I will get a uni Joint ext. Try that. I did not see your thread untill now. Thank you

jondaboll

Thanks for the help. I got everything off and the water pump sure looked corrided internally. I took the car to have the cooling system flushed at a Diamler Chrysler dealer. I was thinking thast since they are part of mercedes that They should know what is needed. Ever since I had it done there the car seemed to run warmer. Also I bet they put regular tap water in instead of distilled by the looks of the pump. This was a year ago now that I had it done. I will get the new pump and hopefully it will go back together smoothly.

vinamg

While you're in there inspect the belt tensioner (inner housing, rubber portion). The tensioner is a common problem on high mileage M103s.

jondaboll

Thanks for the info again. I noticed that the bolt to adjust the tensioner needs to be replaced. If I can I will replace the whole thing. I also contacted Hoehn as you suggested. Again thanks.

mctwin2kman

Make sure you use MB Coolant or Xerex G-05! Those both will work well with the MB cooling system and aluminum components!

jondaboll

That was my next Question. What do I use to put on the bolts when I put this back together. Not a lock tight But?

Mitch_Magali

Was taking off the water pump a difficult job to do? What did you have to remove? I have a leak in the front of my car and I beleive it is coming from this area with the housing mounts to the engine. Any information you can provide would be helpful.

jondaboll

My Car was doing the same thing. I was informed in this Forum That it most likely is your weap hole. It starts leaking when the seal fails.

Is it a difficult job? For me it is. I am not a DIYS Guy! Since I am not working I need to save some bucks and dove into this project. With the help of a couple of MBWORLD members I was able to do it. I started by removing the fan shroud, than the Radiator, Power Steering Pump, And last the Belt and Belt tensioner. There are Two very hard to get to bolts on the water pump. work at it and you will get them. A couple of extensions and a double jount with a good 13mm socket and you are home free. I am just putting the new pump in today! I will let you know how that goes.

MTI

Once you start turning your own wrenches on a Mercedes you come away with some observations: 1) the car is well engineered, there's not much that doesn't fit or come off with the right force and tool; 2) they didn't skimp on fasteners, cable ties, clips and other things that keep things neat; 3) 90% of maintenance on the car can be done with a very average took kit of metric drivers/wrenches, screwdrivers, pliers and beer; 4) it's 10X faster to do things the second time; 5) the hourly rate schedules that the mechanics use assures them a healthy profit margin, but sometimes they deserve it.

Mitch_Magali

Great. That will be my next task. I plan on replacing the valve cover gasket as well since I will be in there. If the leak is coming from this weap hole, do you actually need to replace the water pump? Like you, I am not a DIYS person. I just thought that the housing gasket was all I needed to replace. What do you call this gasket anyway?