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#1
10-09-2016, 10:48 AM
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M104 noise from front top of engine - timing chain/tensioner?
My M104 makes a noise at idle which seems to come from the front/top of the engine. All aux stuff like alternator, AC compressor, belt tensioner etc. is working and not making any noise. This engine does not have an air pump.
The engine seems to work like normal, milage is normal, performance as well etc. The noise has been there as long as I've had the car.. Mileage is over 300000 km, that'll be close to 200k miles. Can anyone help me pinpoint this problem? Check the link here for a short video of the noise: https://youtu.be/Ia_Nniw0ZL4
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'95 E36T AMG (124.092) '98 E200T (210.235) '00 E430 4Matic (210.283) 
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#3
10-09-2016, 01:58 PM
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change oil to see if metal flakes.Mine did that,i bought a newer engine.Never tore it down cause alumin all thru engine.Might be oil chain pump.
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran
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#4
10-09-2016, 02:19 PM
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This engine has got hydraulic valve lifters as far as I know. Oil is perfectly fine, level correct, pressure good and oil/filter changed 1500 km ago. I've heard the same noise from another M104 engine, but then again another without any noise. It doesn't seem to impact anything, but it doesn't sound very good at all. The noise seems to disappear at higher revs and it's not possible to hear it inside. The video makes it appear worse than it is.
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'95 E36T AMG (124.092) '98 E200T (210.235) '00 E430 4Matic (210.283)
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#5
10-09-2016, 02:37 PM
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Many 104s have an audible piston slap at slower speeds and with the longer stroke of the 3.6 it can be exacerbated. Never seen a real problem come of it.
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 90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#6
10-09-2016, 04:28 PM
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My engine failed,flakes all over and in oil filter,and oil drain pan.I would not run engine anymore.Hopefully oil chain is the culprit,or timing chain.Wearing against timing cover.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran
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#7
10-09-2016, 04:37 PM
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rebuilt m104 at ebay.de $3400 euros
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran
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#8
10-09-2016, 08:27 PM
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one more thing.I live in the country,so I can look and dump my oil without fear around my home where i don't want weeds,or grass.thats how I can look for metal flakes.
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran
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