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1971 350SL (107043-10-003084), 75 450SL(parts car), 79 450SL(maybe parts, maybe fix)
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24 Posts
Discussion Starter #1
I've got an M116 4spd 350 SL that is probably overdue for a timing chain. After running quietly for over 100 miles Saturday, we noticed sounds coming from the SUV next to us at a stop that sounded like a hand full of screws in a blender. At the next light, same noises, different car...must be me! Pulled into a gas station and sure enough, sounded bad. Shut down and did some cursory inspections...nothing obvious. Had to move from where I was if waiting for a tow. Fired up ...quiet. Brave or stupid, I drove the 60 miles home, no noise. Will pull cam covers to inspect but my head associated the frequency of clatter with chain links. Other suggestions welcome.
Back to the question; from several US suppliers, I have been told they don't have numbers for Euro cars.
Does anyone have the correct PN for the timing parts for engine # 116-980-12-007792 or should I be contacting MB Classic Center?
Thanks.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,766 Posts

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,590 Posts
Examine your existing guides carefully before replacing them. If original your guides are metal backed. Replacements will be plastic/nylon.
 

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Registered
1971 350SL (107043-10-003084), 75 450SL(parts car), 79 450SL(maybe parts, maybe fix)
Joined
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24 Posts
Discussion Starter #4
Well...it does not look like the chain was the cause of my noise, and it has already been replaced. Master link was showing proudly. Good tension, and no evidence the chain ever rubbed on the heads. Guides are black plastic on a metal back. Three of the four look good, with little grooving. One, the upper one on the left, has some choppiness showing on the edge Don't know what to make of it. Only other thing I found was some scoring on the cam lobe for #5 most forward.
 

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'72 450SL, 107.044-12-000422
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326 Posts
Have you checked valve clearance?


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Registered
1971 350SL (107043-10-003084), 75 450SL(parts car), 79 450SL(maybe parts, maybe fix)
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24 Posts
Discussion Starter #6
Have not. Is there a link/sticky for a recommended procedure?
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,766 Posts
I would be surprised if noise from lifters was that loud and would come and go. I once thought that was source of rattle on my car but found lifters needed hardly any adjustment. One time, it WAS the chain and tensioner!

Check with stethoscope or long tube next time it happens. Could be anything. Try to narrow down source.

Some suggestions. Heat shields under car or on manifolds. Alternator and/or bracket, something touching fan blades/belts/clutch. , Air filter housing, blower or something else loose and rattling. Over past 30 years had most of those!
 

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1971 350SL (107043-10-003084), 75 450SL(parts car), 79 450SL(maybe parts, maybe fix)
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24 Posts
Discussion Starter #9
Are you referring to the fan clutch or transmission clutch...4 spd...? My second thought was to see if something is loose there (trans clutch) as it looks like the clutch hydraulic cyl was a recent replacement. ( And engages way too close to the floor!)
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,766 Posts
Fan clutch. No experience with manual transmissions on 107s.
 
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