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The oil test port is here: In red. Not sure if this is before or after the filter, looks probably before as oil will flow inwards from the outside of the filter media. Ill pull the filter again tomorrow and take a good look down the housing neck to make sure there isnt a stray o-ring stuck...

Originally Posted By: Linctex Originally Posted By: alexanderfitu L..... no oil pressure sensor in the system (which is stupid imo) So much for "advanced" german engineering.... Tell me about it.

Luckily this car is "dumb" A non variable oil pump and no oil pressure sensor in the system (which is stupid imo). Just went out to satisfy my curiosity. 2 bar at idle @60 deg oil temp. So pressure isnt the problem.

Originally Posted By: 440Magnum I agree. What changed! Mercedes OEM oil filter a year ago. Mercedes OEM oil filter this year. Same oil as last year as well.... I replace the oil filter (and o rings) in case it was that but no change. Copme to think of it, the only work I have done on...

I think it may be bypass valve related but struggling to find its location on the parts catalogue. Sorry, forgot to mention, new MB filter and O rings installed with no change. I think next step is to measure the oil pressure....

Hi there Yes indeed, I have used a stethoscope, its 100% coming from the oil filter housing.

Hi all Odd one on my V12 Mercedes. The oil filter housing has started buzzing randomly at idle. The noise is quite loud. Can be heard at 30 seconds on the attached video: https://www.youtube.com/watch?v=R5u3kvaY_9k Oil is Shell Helix Ultra L 5W-40 and is approximately 500 miles old.

I put a new headgasket on it and fired it up. Ran fine! Did some compression readings, 450/470/460 psi!! Seems as though its currently ok, so I am going to run it for a while and see what happens. I have bought a spare so if worst comes to worst....

Originally Posted By: dlundblad What sort of application will this be used in? Could you run it and get a UOA after the first 25-50 hrs of use? *Missed your last post. Its to go in a diesel generator on the roof of a small businesses for battery/power backup for networking systems. Id...

Originally Posted By: Kuato Originally Posted By: alexanderfitu Originally Posted By: Kuato Sounds like a warranty claim with your supplier! Ugh, engine was supplied 2 years ago and they have long since gone bust! That is a shame...well from an uninformed point of view I'd have the sleeves...

Originally Posted By: Linctex Yeah, right. Sure. I have a bridge for sale, cheap. Engine was purchased with 10 hours on it, not 0. Everything I see when working on the engine makes me believe that, why are you so confident it isnt? I would agree with you that its scrap if the liners are...

I agree completely! I will be chatting with my local engine place and see what they say.

Originally Posted By: OVERKILL That's concerning, because generally if it is rust, you'll be able to change its appearance. A crack on the other hand.... you won't. ahh, I see! I think this is a crack. Its location opposite the core plug is not coincidental I believe.

Originally Posted By: OVERKILL Originally Posted By: alexanderfitu Thanks for the quick replies! Yes the second picture is the one I am worried about. That mark is opposite the core plug that popped out. Rubbing it with clean oil does not change its appearance. I cannot feel the mark at all...

Originally Posted By: Kuato Sounds like a warranty claim with your supplier! Ugh, engine was supplied 2 years ago and they have long since gone bust!

Thanks for the quick replies! Yes the second picture is the one I am worried about. That mark is opposite the core plug that popped out. Rubbing it with clean oil does not change its appearance. I cannot feel the mark at all. This engine is designed to have liners replace, so I suppose I...

Hi all I have a Kubota D722 that was supplied with water in the cooling system rather than coolant! The engine sat on its delivery pallet for a year and we had cold weather (-6 deg c) for a month or so. I believe the engine was only half full of water but it still did some damage. It popped...

Right. I see. Great, I'm not worried either. I will see how it progresses. Many thanks.

Originally Posted By: kschachn By the way, it is "silicon" not silicone. The ICP analysis detects elements only, not compounds. Which also contributes to the uncertainty of origin since you don't really know where the silicon comes from. Both silicone and silicon dioxide are silicon and oxygen...

Ahh I see. Yes, I think the silicone reading is from contaminants due to the airbox. Thanks, I will do another one in 10k miles time.