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  #1  
Old 04-05-2011, 04:29 PM
Harrison W's Avatar
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Location: Boise, ID
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Replacing the head on my 87 300 SDL. HELP!

I have an 87 SDL with the OM603 motor in it, and I had it run away after replacing the vacuum shut off valve. Got so hot that the stupid #14 head cracked of course... It's so severe that even after cranking for 30 seconds, pulling the cap off the coolant tanks is ridiculously loud.

Anyway, I need to replace the head so I can get the car sold. The rest of the motor is incredibly solid. New turbo, radiator, tranny, completely new AC system, completely new IP... Cherry.

Are there any good step by step guides to help? Where should I even start with this project?

Any help would be much appreciated!
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  #2  
Old 04-06-2011, 12:45 AM
Jeremy5848's Avatar
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You may want to hire someone more experienced in Mercedes wrenching to do the head replacement.
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  #3  
Old 04-06-2011, 02:00 AM
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Have you got the factory service manual? It is absolutely *critical* for a job that large. I'd go so far as to say that if you don't own a paper copy (scarce as hens' teeth) you would be well served by printing out relevant pages and taking them out to the garage with you.
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1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
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  #4  
Old 04-06-2011, 09:20 AM
vstech's Avatar
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think on this first.
what are you expecting from the sale of the car?
how much will a new head cost? (I'm assuming you want to put the latest #22 head on. which will require new injectors and new injection lines) total up all that and decide if it's worth it to sell the car.
someone here on the forum may be interested in the car AS IS...
I'd not recommend that large a job be done on a car JUST TO SELL IT.
but I don't know the car, it may have huge resale value. low mileage, etc?

also, since the head damage was done in a runaway condition, perhaps it's not all that got damaged. you could go to the expense of replacing the head and find the mains are damaged, or the pistons got burned, and scored the liners, requiring a new set to be installed... just to sell the car.
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