Problems MBZ 190E 2.6 '89 - HELP! - Mercedes-Benz Forum

 
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post #1 of 9 (permalink) Old 10-11-2006, 12:02 AM Thread Starter
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Exclamation Problems MBZ 190E 2.6 '89 - HELP!

There are a couple of issues that I need to have help on:
1. How do I remove and replace the belt tensioner?
2. At what temp should the Auxillary fan turns on?
3. How do I know if the fan clutch is working?
4. How do replace the rear tranny oil seal?
The issue that I have is overheating, I have removed the thermostat, replace the water pump, replaced the radiator and it is still over heating. It takes about 20mins at idle before it over heat.
There is also a leak on the transmission and a mechanic told me that it is the rear oil seal. I have replaced the pan gasket.
My mechanic said that the 190 is a lemon but I like the car and style.
Help me fix my baby!!!!!!
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post #2 of 9 (permalink) Old 10-11-2006, 12:50 AM
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as for your mechanic he's smoking crack i got a 1985 mb 190 e
and it runs good if you take care of them
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post #3 of 9 (permalink) Old 10-11-2006, 07:54 AM
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If you remove the thermostat, isn't it possible the water isn't remaining in the radiator long enough to cool? Does the car overheat at speeds of 30 MPH or above?
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post #4 of 9 (permalink) Old 10-11-2006, 01:38 PM
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Quote:
Originally Posted by The Melmaan
There are a couple of issues that I need to have help on:
1. How do I remove and replace the belt tensioner?
2. At what temp should the Auxillary fan turns on?
3. How do I know if the fan clutch is working?
4. How do replace the rear tranny oil seal?
The issue that I have is overheating, I have removed the thermostat, replace the water pump, replaced the radiator and it is still over heating. It takes about 20mins at idle before it over heat.
There is also a leak on the transmission and a mechanic told me that it is the rear oil seal. I have replaced the pan gasket.
My mechanic said that the 190 is a lemon but I like the car and style.
Help me fix my baby!!!!!!
Melmaan - Check your previous post "89 MBZ 190 Overheating" on page 4 of this forum.

As I said earlier, if you removed and didn't replace your thermostat- it may cause overheating. (see my explanation in the previous post.)

Now to answer your new questions:
1) To remove the belt tensioner you need to remove the serpentine belt, the bolt that attached the tensioner pulley to the tensioner and the bolt that attached the tensioner to the engine (bracket). Please note that the tensioner pulley bolt loosens oppsite the engine's rotation.

2) On a 300E 2.6, the auxillary fan turns on at above 84 degree which is the thermostat setting.

3) To check the fan clutch - remove the serpentine belt and turn the fan blade, when cold the fun is hard to turn, when hot the fun is easy to turn.

4) Rear tranny seal - if you are referring to the seal between the engine and transmission, you have to remove the trans. If you are referring to the seal between the trans and the propeller shaft, you have to remove the propeller shaft plunge.

It is easy to conclude that a car is a lemon if one don't know what is wrong and why it got to that stage of disrepair.

I can help you solve of determine the cause of your overheating if you answer the ff questions:

1)Did you remove your thermostat and not replace it?

2)Are your combustion chambers compression even or within normal spec?

Post your answers and go back to this thread, don't open another thread.

Ed
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post #5 of 9 (permalink) Old 10-12-2006, 10:38 PM Thread Starter
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Ed,
The answers:
1. Yes, I removed the thermostat and did not replace it thinking that when it is open all the way, then the water should cool faster.
2. I have not checked the compression of each chamber yet. I hope that it is not a blown head gasket. I don't see any mixture in the oil when I replaced it nor did I see any oil on the coolant when I removed the radiator.
I hope to solve this problem so I can start driving the Baby again.
Thanks,
Mel
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post #6 of 9 (permalink) Old 10-12-2006, 10:40 PM Thread Starter
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Marcus,
Funny thing is when I run or reve up the engine, the temp goes down.
Thanks,
Mel
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post #7 of 9 (permalink) Old 10-13-2006, 08:30 AM
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The cooling system is designed around the idea that a thermostat be present. It doesn't surprise me that it overheats without one. I would start by installing a new MB thermostat. Afterwards, post back as to whether it still overheats.
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post #8 of 9 (permalink) Old 10-13-2006, 10:48 AM
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Quote:
Originally Posted by The Melmaan
Marcus,
Funny thing is when I run or reve up the engine, the temp goes down.
Thanks,
Mel
Based on this, you may have a chance that it is not head gasket. As recommended, install a new thermostat specifically designed for a 2.6 engine, IIRC it's 84 Degrees. Be sure you know the proper orientation of the thermostat. If you install it the wrong way it would result in overheating. Good Luck!
Ed
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post #9 of 9 (permalink) Old 10-13-2006, 02:38 PM Thread Starter
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I will hunt for a theremostat for the baby and install it.
You guys are great!!!!
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