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#1
10-04-2012, 01:34 AM
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380 Timing Chain Installation Problem.
Hi all, I bought an 1980 380 SL and found that the engine is badly in need of a new timing chain. Having quite a bit of mechanical experience, including rebuilding an 911SC engine, I read the Peach Tree technical article which seems straight forward and went ahead with the project. The engine was free turning and had good compression when I started. To turn the engine over easier, I took out the tensioner which in retrospect looks like it was a bad a idea. Now,
as I turn over the engine with a wrench, I am getting piston interference even though I put the tensioner back and all 3 timing marks line up. I haven't changed chains yet. Any ideas? Thanks, Joe. 
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#2
10-04-2012, 10:11 PM
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Do you have a manual?
I replaced my chain years ago. I don't recall the specifics, but I had the MB paper manual and it was very detailed. That same manual is available for free from MB at startekinfo.com.
__________________
07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230 retired W210 (x3), W124, W126
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#4
10-06-2012, 07:18 AM
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M116 chain replacement
When I replaced mine, I upgraded to the dual chain so I had to remove the front cover. One of the plastic guides broke so I had no choice (MB recommended the upgrade anyway). I don't know if you have the single or double chain, but if it is a single you may want to think about the upgrade. It wasn't that much harder and you replace all of the guides.
Re-look at 05-320. You are supposed to remove the tensioner to change the chain. With the engine at TDC on the #1 cyl, both chain sprockets should line up to the marks. If you suspect that the timing is off, then look at 05-215.
__________________
07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230 retired W210 (x3), W124, W126
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#5
10-09-2012, 12:34 AM
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You probably broke a chain rail when you removed the tensioner, and the broken part got wedged somewhere between the chain and a sprocket.
To turn the engine over easier, remove the spark plugs.
__________________
 76 240 D. Bought in 1998 for $25. 85 300D. Got it for free with a bad engine. ( Sold ) 60 Unimog 404. What was left of it, was given to me. Now powerd by 617A. 88 560 SEL. Bought without engine and trans. Now powerd by 617A. 67 250 SE. Cuope. For resto or sale. 64 220SE. For resto.
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