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Old 03-17-2013, 09:54 PM
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Join Date: Mar 2013
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Question OM603 Check

Hello, I had my 1990 350sdl for a while now and I want to know what you guys think about the engine since I have never owned a MB turbodiesel before so I can't tell if anything is wrong with the engine. It has 170xxx now and I know the engine in my model are the notorious rod benders. How do I know when its going to go bad? What can i do to prevent it? Thank you very much.
Link: 1990 Mercedes 350SDL OM603 - YouTube
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Old 03-17-2013, 11:25 PM
compress ignite's Avatar
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Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Observe/Watch Oil Consumption ,Pray ,And look for a GOOD 3.0 liter OM603 just in case

Is this a Mercedes Re-Man (FIXED with the STRONGER RODS ?)

If you've gotten to 180K miles You may HAVE one of the few GOOD Engines.
'84 300SD sold
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Old 03-18-2013, 08:05 AM
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Join Date: Dec 2011
Location: North West CT
Posts: 378
if you have an MB rebuilt, I wouldn't be too concerned. They can still fail, but it's less likely. If you have the original engine with that kind of mileage, well it is what it is- keep driving it. It has been fine this far and even though we tend to expect more from an MB diesel, this is a higher mileage than any car company intends for their vehicles to achieve.

There is nothing you can do to prevent a rod failure. The failure can reveal itself in a couple of ways. You might not notice anything until you start burning lubricating oil, or it might be that your car starts to run unevenly. There is a 3rd potential for failure in your engine. It has a windage tray installed, and the bolts that hold it in place have been known to work loose and find their way into the oil pump. It's what killed my '91's 350. You CAN prevent this by dropping the oil pan, and loctiting the bolts in place.

1991 350SD
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