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Old 03-03-2012, 08:50 PM
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Location: Melbourne Australia
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I wouldn't just change to sludge cleaning oils and be done with that.
Check these images from a sludged up M103.
The engine that these images came from seized up.

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Old 03-04-2012, 12:36 AM
Dave Donaldson's Avatar
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Join Date: Nov 2011
Location: Canada
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I do not recommend any one does this to a Benz,,A way back in the younger years, the following was done to old sludged up engines,, like 1/4 inch all over every thing,,first we would get the engine hot . Shut her down and drain the oil and pop out the plugs. Next we take 2 quarts of diesel fuel and 2 quarts of atf,put it in and turn the engine over with the stater. no compression cause the plugs are out,,, after about 10 mins we pull the oil ,, oil pan and valve covers off, and filter and blow out all the oil lines in the block, via the oil filter spigot and such . replace pan, filter, and valve covers. Add new oil spin her again without the plugs in ,drain and fill her up one more time,,then repeat and drive her for a day or 2,,change oil again. Lots of sludge came out ,cars ran fine,, just got lucky I guess.
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Old 03-06-2012, 08:56 PM
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Location: Marion, Arkansas (near Memphis, TN)
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Originally Posted by d.delano View Post

The three rockers per cylinder is still strange, as is the SOHC design on an S-Class. Some quick research explained it all. Here I was thinking the car had an evolution of the M119 but instead has what seems to be a cheaper, more value-engineered design. Food for thought. Not everything improves with time apparently.
We work on 20+ M112/M113 engined vehicles per week, and I own two vehicles with the M112 engine and I can assure you that these engines are FAR superior in construction and execution to any of their modern engines before or after. They will take abuse that the M271/M272/M273 absolutely will not take. We are seeing engine failure (specifically block/piston wear related ) on sub 100K M272 V6 engines that MB is attributing to use of paper filters. That coupled with the balance shaft issues is going to make me jump over to BMW N52/N54 engined cars when my M112 cars are too long in the tooth to reasonably expect to be primary family-moving automobiles, as nothing MB has made after 2005 has inspired any confidence in engine longevity.
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Old 03-06-2012, 09:12 PM
Yak Yak is offline
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Location: San Antonio, TX
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Originally Posted by Ivanerrol View Post
I wouldn't just change to sludge cleaning oils and be done with that.
Check these images from a sludged up M103.
The engine that these images came from seized up.

Would you recommend an oil analysis in sludged or sludge prone engines, then? I presume that could indicate additional bearing or cam wear, assuming the analyst had data on engine component materials.

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