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  #1  
Old 07-13-2015, 09:12 PM
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617 motor removal

hello community...
my 1985 300D (sedan) engine died. I thought it was the turbo, so had that rebuilt, didn't help. (i was having a loud metal scrapping noise). I did examine the glow plugs, replaced the battery, and was able to get it started. But after a very short time, like within the day of starting it, it seized and died. Now it wont turn over. I figure i have to remove the engine and asses the damage in hopes of rebuilding it. Since the car was free, this might be a viable option.
What my questions are:
-Are the any good threads/links on how to removing the engine?
-How much of the engine can i remove while its still in the car? (My experience-I have removed/replaced a head gasket on a 300TD, has 25K miles, still going strong). i feel confident enough to handle this task, I'm just unsure about the proper order of task.
-Nope to find some help in regards to the order in which i should proceed.
-What other things should i think about replacing while doing this job?

Any help and time is greatly appreciated.
I'll try to post a video of when i had it running, I think you'll recognize the loud metal sound. thank you.

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Old 07-13-2015, 11:33 PM
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Find the FSM online and download. It has a complete description of the job.

It might be worth it to tear down the engine to satisfy your curiosity, but repairing the engine is probably not your best option.
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Old 07-13-2015, 11:40 PM
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Strech wrote up an awesome DIY when he pulled the engine from his 300D NA. There are some differences between the NA and turbo engine pulls, but the basics are all there. Here it is:

How I took out my 1981 W123 300D (euro) non-turbo engine
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Old 07-14-2015, 12:02 AM
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Taking the whole motor out is easier than taking the head off. FSM is your friend. I put it in a thread on std recently.

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Old 07-14-2015, 07:11 AM
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If you are motivated you can get a OM61X engine out in an afternoon. If you are removing the transmission as well you will need a load leveler on your engine hoist. This is an OM616 I'm removing here and there is barely enough room to get it out with the transmission on. I also recommend getting a heavy duty engine stand like the one posted below. These engines are heavy and you don't want one falling on you.





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Old 07-14-2015, 10:09 AM
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I would source a used engine, hear it run, do a compression & leak down test, clean it and put new gaskets on it to stop the leaks, then install. Make sure yours is bad 1st. Where are you located? People on the board have multiple parts cars.
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Old 07-14-2015, 10:58 AM
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I just pulled and replaced my 617 in my 85 300SD a couple months was not that bad.

1. Take a lot of pictures of vacuum hoses and things.
2. I think it is easier to take motor and trans out together although I did have to drop my front
bumper down so I could get my engine lift in far enough.
3.Basically you have 2 motor mounts and a rear trans. mount unhook driveshaft at front and all wires and hoses that connect to body of car and your good to go.
4. Like anything it comes apart easier then it goes back together probably cheaper to find a good used engine then to rebuild.
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Old 07-14-2015, 11:05 AM
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Quote:
Originally Posted by gatorblue92 View Post
If you are motivated you can get a OM61X engine out in an afternoon. If you are removing the transmission as well you will need a load leveler on your engine hoist. This is an OM616 I'm removing here and there is barely enough room to get it out with the transmission on. I also recommend getting a heavy duty engine stand like the one posted below. These engines are heavy and you don't want one falling on you.
or a reciprocating saw to cut the radiator support and lower valence out of the way

uhhh, unless you're trying to keep the car intact then use the load leveler
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Old 07-14-2015, 04:42 PM
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thanks very much for the responses.
i think im going to slowly take apart the engine while its in the car until i can detect what wrong with it. then repair the issue, hopefully. anymore help will be greatly appreciated.

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