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  #1  
Old 03-31-2014, 01:38 PM
Deemo13's Avatar
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Location: Stockton, CA
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1981 300SD timing chain new project?

Hey PeachParts,

My friend has a 1981 300SD. The car just turned 300k miles, but as he was driving home, the timing chain snapped on him and shattered the valve cover. I was thinking of picking it up as a new project. It is in pretty good condition inside and out despite this.

Is the motor repairable? If so, I'd like to pick it up as a project or help him to repair his. I feel like getting the timing correct would be a PITA. I most likely wouldnt keep the car since I have too many already, but it is a very nice car that deserves to be fixed.

Also along the lines of this, my motor going into my 240D is going to have 266k miles. Should I have a look at the timing chain before I run the motor?

Thanks guys,
-Josh

EDIT: dieselgiant just answered my question sort of, but I'd still like thoughts about it.

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1980 240D "Haley" - 266k mi | OM617.952 | 4-speed | Euro Propshaft | 2.88 Rear | Motor Out of Car
1994 E320 "Lauren" - 115k | As stock as they come
2010 Mazda Axela "Grace" - 32k | H&R Lowering Springs | K&N Air Filter

1981 RX7 - Sold and not really missed

Looking for a paint color suggestion for my 240D with Palimono MB-Tex interior!
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  #2  
Old 03-31-2014, 04:22 PM
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Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,653
Generally speaking...no. the engine will have other damage besides the VC.

Bent Valves, broken Cam Shaft, bent twisted Rockers. Cracked head etc...
You won`t know if the Rods are bent or a cracked piston.

I would just R&R the engine with a good known one, and then deal with the broken one later.

With the blown engine, it is a $600 vehicle and a PNP candidate.

I had this happen at 65mph. every Valve hit a piston top.
At 331K miles, we just replaced the engine.

If this SD is in good condition other wise and you can get it cheap enough, go for it.



As to your 240D.
I think Roy, Whunter said he just replaces the chain after 150K miles, and especially when buying a new/used one. But with the mileage you mentioned. I would replace it and the plastic rails. The Sprokets will wear to a point, and they can add wear to your new chain. it is easy for the cam Sproket, the others a bit more work. It will be pricy to do it. If you do, use a German IWIS Chain.

Here is a good thread:
9 degrees of chain stretch

Have you checked the Timing Chain stretch? There is the 2mm lift check.
PeachPartsWiki: Measuring Timing Chain Stretch


Charlie
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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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  #3  
Old 03-31-2014, 04:36 PM
Stretch's Avatar
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If the transmission has already been replaced or redone then you've got a potential engine swap on your hands - otherwise it could just be one big thing after another.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #4  
Old 04-01-2014, 05:08 PM
Deemo13's Avatar
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I might hold off on his car then. He is trying to sell it but its been sitting for the past few months. Luckily finding a spare OM617 isnt that difficult yet.
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http://i1269.photobucket.com/albums/...ps988ecb84.jpg

1980 240D "Haley" - 266k mi | OM617.952 | 4-speed | Euro Propshaft | 2.88 Rear | Motor Out of Car
1994 E320 "Lauren" - 115k | As stock as they come
2010 Mazda Axela "Grace" - 32k | H&R Lowering Springs | K&N Air Filter

1981 RX7 - Sold and not really missed

Looking for a paint color suggestion for my 240D with Palimono MB-Tex interior!
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  #5  
Old 04-01-2014, 08:25 PM
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Location: Philadelphia, PA
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I had an 81 240D towed into the dealer about 14 years ago. The car got towed because the timing chain snapped. I knew someone who needed a new car. We bought the car. We did a head rebuild, timing chain, and all associated parts. The bottom end was fine. Was driven for another 8 or so years before it was sold for a W124 Diesel. I was just really lucky when I took it apart and it was ok. I'd recommend a new engine at this point because you probably won't get that lucky. The 617 is a dime a dozen in the yards. If the paint, suspension, interior and AC plus everything else is ok I would say buy it. W123 and W126s are difficult to find in ok shape at best and great shape is difficult.

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