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  #1  
Old 08-26-2011, 06:34 PM
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Exclamation 1981 300sd HELP!

Hey PeachParts! I am here as a last resort of help, I received this wonderful car as a gift from my friend and yes you've guessed it, there are problems with it. My friend informed me in the past that the car has overheated twice and after that wouldn't turn over. There would be oil that sprays all over the engine once it runs but my problem is that the car wouldn't turn over at all after it sat for about two months. I live in Southern California where there isn't any chance of extreme weather that got to the car but I, being a very virtuous person cleaned the engine with a degunker, drained the oil completely (there was about 1/10's water in there) , bought a new battery / headlights etc. , and also discovered that there might be a component in the engine bay that may be missing. I am asking all other 81 300 sd owners to please help me figure out why there are electrical wires and a metal shaft left unused located behind the left headlight in the engine bay. If anyone could advise me on what my next actions can be [ cleaning glow plug bay of carbon build-up, inspect vacuum schematics]. This car is not just a piece of metal, but my very first Mercedes that I really want to use and cherish with TLC. thank you.



Picture 1: Unknown hoses (I believe circulates oil?) I've researched but found no answer to where they lead
Picture 2: Another shot. I believe it comes from the A/C condenser . Electrical wiring?
Picture 3: A broken plastic bit that does not let secure to plug into (item in picture 4) Unknown to use in engine
Picture 4: Side of engine nearest to driver where an electrical wire plugs into.
Picture 5: Vacuum tubing related to ignition or injection. I feel like I'm missing a few tubes.
Picture 6: Where the cords and hoses originate from pics 1 & 2 above
Picture 7: I feel like I'm missing a fan, I've seen other benz's with fans on the exterior of their grills. Is this optional or additional fans would help the radiator.
Picture 8: Discovered a missing screw that secures the cylinder head cover. Would this explain water in the oil which leads to overheating?
Picture 9: Another shot of the 'emptiness' in the engine bay
Picture 10: Different Angle

Attached Thumbnails
1981 300sd HELP!-100_0840.jpg   1981 300sd HELP!-100_0841.jpg   1981 300sd HELP!-100_0842.jpg   1981 300sd HELP!-100_0843.jpg   1981 300sd HELP!-100_0844.jpg  

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Old 08-26-2011, 06:40 PM
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cont.
Attached Thumbnails
1981 300sd HELP!-100_0847.jpg   1981 300sd HELP!-100_0848.jpg   1981 300sd HELP!-100_0849.jpg   1981 300sd HELP!-100_0851.jpg   1981 300sd HELP!-100_0852.jpg  

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  #3  
Old 08-26-2011, 06:42 PM
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Oh crap, I accidentally posted this thread in the wrong section.
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Old 08-26-2011, 06:59 PM
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Relocated to the correct place.
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Old 08-26-2011, 07:14 PM
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No, picture #5 is your EGR which, today, is not necessary. You need to check your system for vac leaks but right now you can trace the two plastic lines from the EGR back down to the engine - actually to the VAV - remove the plastic lines from the rubber Ys and put golf tees in the rubber Ys coming from the VAV. This might help to resolve vac leaks.

I have an 81 SD and cannot really tell much from your pics because they are so close up I cannot orient them in the engine. I am sure someone else will chime in with more info.

Good luck. The SD is really a great car. How about a pic of the car.
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Old 08-26-2011, 10:11 PM
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The fan (and condenser) is "missing" from in front of the radiator for the air-conditioning. It's unclear but it sounds like the lines, from the compressor, are what's stored behind the headlight. The emptiness is missing the receiver-drier for the a/c, as well.
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Old 08-26-2011, 11:09 PM
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I would do a few searches on this site. There is alot of info here and will answer alot of your questions. I would put the A/C repairs on hold until you find the issues with the engine. Water in the engine is not good. can you turn the crankshaft?
Don't give up on her, she will give you years of happiness when you are done.
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Old 08-26-2011, 11:25 PM
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By not cranking do you mean the Engine will not turn at all or do you mean the Engine turns but will not start?

If you found Water (is it Water or Coolant from the Engine). I would assume that there is a bad Head Gasket or something is cracked and letting the Water into the Crankcase.

If you believe there is Water/Coolant in the Cylinders do not attempt to crank the Engine uintil all of the Glow Plugs are removed. After that crank the Engine by Hand and see if any Water/Coolant comes out.
If not do not put the Glow Plugs in yet but try Cranking the Engine to see if it will turn.
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Old 09-05-2011, 01:31 PM
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hey I removed the glowplugs, sprayed some PB blaster in it and let it sit. I need to fill up the engine with Motor Oil... Any suggestions? I was going to purchase and use mobil 1 turbo diesel truck sae 5w-40... Is there a way I could "flush" out the older oil and possibly any leftover water (if any) inside?
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Old 09-05-2011, 02:03 PM
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I would undertake no repairs before first determining if you have a cracked head, cracked block or bad headgasket. Any of those problems will require a lot of $$ to repair. Water in the oil is an indication of one of those problems. A missing screw in the valve cover will not permit water to get into the oil.


Upon further inspection, the hole in the picture is not a missing screw from the valve cover. It's a hole into the head. Not sure what it is but I don't think it would allow water into the oil.

Given the apparent condition of the vehicle you may need to seriously reconsider whether the person who gave it to you is actually a friend.
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Old 09-05-2011, 04:04 PM
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I think you need to go to a junkyard and hoist the hood on an old SD. Then compare what you see to yours; you seem to have quite a lot missing. Take some pictures before you go and take them with you. Or find someone in the neighborhood with an SD.
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  #12  
Old 09-05-2011, 04:23 PM
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Quote:
Originally Posted by kerry View Post
I would undertake no repairs before first determining if you have a cracked head, cracked block or bad headgasket. Any of those problems will require a lot of $$ to repair. Water in the oil is an indication of one of those problems. A missing screw in the valve cover will not permit water to get into the oil.


Upon further inspection, the hole in the picture is not a missing screw from the valve cover. It's a hole into the head. Not sure what it is but I don't think it would allow water into the oil.

Given the apparent condition of the vehicle you may need to seriously reconsider whether the person who gave it to you is actually a friend.

x2

If nothing else he gave you 500 bucks worth of scrap metal and maybe some extra depending on what you can part out of her. Spend some time on it and you could get a couple grand out of the parts. But that hold in the head looks bad... did someone shoot the engine?
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Old 09-05-2011, 04:35 PM
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the hole in the head could be the coolant bleed tube hole... but I think it's on the passenger's side, not the driver's side. My SD is not at home at the moment, or I'd go take a look.
either way, it looks like you are going to need a few parts to get A/C working, and certainly going to need a trip to the parts yard, or a perusal of our parts forum...
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  #14  
Old 09-05-2011, 05:39 PM
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Quote:
Originally Posted by kerry View Post
I would undertake no repairs before first determining if you have a cracked head, cracked block or bad headgasket. Any of those problems will require a lot of $$ to repair. Water in the oil is an indication of one of those problems. A missing screw in the valve cover will not permit water to get into the oil.


Upon further inspection, the hole in the picture is not a missing screw from the valve cover. It's a hole into the head. Not sure what it is but I don't think it would allow water into the oil.

Given the apparent condition of the vehicle you may need to seriously reconsider whether the person who gave it to you is actually a friend.
X3

Do some diagnostics before you begin to spend. You said oil was all over the engine compartment - sounds like maybe a bad sealing ring on the oil filter housing. Wouldn't cause water in the engine oil though...

Visually inspect engine for damage to the block, head, valve cover gasket, cast oil pan and sheet metal oil pan.

Do a compression test on all cylinders.
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  #15  
Old 09-05-2011, 08:56 PM
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Quote:
Originally Posted by kerry View Post
Given the apparent condition of the vehicle you may need to seriously reconsider whether the person who gave it to you is actually a friend.
LOL! I understood the fact that there's problems in it. It's just a very good excuse to get involved in mercedes and just the experience gave me a LOT of knowledge... I'm considering purchasing another used W124 / W123 mercedes and maybe interchange parts... Because I have accepted the fact of this benz being dead. I just thought i'd give it a shot.

out of curiosity, where can i look for cracks if there are any.

p.s. the 'hole' has threading in it and my 50mw laserbeam shines perfectly through at night.. i still believe that is the source of the water entering.


my friend said that the car overheated AFTER he removed the head cover...

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