When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Yes- I believe so....there is a rectangular plate on the timing cover, somewhat below the oil filter housing with an allen screw in it, which may be able to facilitate an oil pressure sender.
Think you're talking about part number 1120150630. And from what I was able to find online, the thread for the port is M12x1.5. VDO and Bosch makes senders in this size, but obviously you're not limited to that size with an adapter.
Not sure if you're allowed to link content from other MB sites so I won't even try, but if anyone googles "Adding oil pressure gauge CLK500", they'll find someone who tapped this very port for an oil pressure gauge. It's a W209, but the part number and function of the port are the same as our cars. Hardest part of the install seems to be figuring out where to mount the gauge, assuming you want more info than just an idiot light that gets triggered at some catastrophically low pressure.
I think it is because the chunk came out of the one on his original engine. I agree that even with a hardened o-ring as long as it is still in one piece and under undisturbed sealing pressure it is probably working 98% as well as it was when new. It is a bit hard to speculate on the condition of the replacement engine's bearings. Maybe the engine was well taken care of, maybe not. Maybe it was a coincidence the second engine also had some minor damage. Maybe all of our engines look like the second one but never get significantly any worse in their life to actually cause failure. Lots of questions, N=2 doesn't quite do it for me yet.
I had the subframe out and the oil pan off once for maintenance a couple years ago. It wasn't that bad of a job except for resealing the oil pan. Oil drips out endlessly and gets on the sealing surface, even after a week. If it wasn't for that, I'd pull it out again for my next round of suspension maintenance and have a look.
That's why I hate pulling the oil pan (and timing cover) with engine-in on cars that don't use preformed gaskets. One way or the other, it just becomes messy. I'm just going to add an oil pressure gauge and call it a day.
I think it is because the chunk came out of the one on his original engine. I agree that even with a hardened o-ring as long as it is still in one piece and under undisturbed sealing pressure it is probably working 98% as well as it was when new. It is a bit hard to speculate on the condition of the replacement engine's bearings. Maybe the engine was well taken care of, maybe not. Maybe it was a coincidence the second engine also had some minor damage. Maybe all of our engines look like the second one but never get significantly any worse in their life to actually cause failure. Lots of questions, N=2 doesn't quite do it for me yet.
Yeah I think the same. I don't doubt that these seals can get hard, but like Dave and Italian Joe said, it probably wasn't the primary reason his engine blew. He had a crazy setup and drove it extremely hard. I still plan to throw an oil pressure gauge in the car though.
Sadly, I had to take the engine of my E55 apart. I was installing a water injection nozzle pre intercooler and after assembling everything back together I started the engine again. Three seconds later all hell broke loose. Clearly, something was in the engine. At this point I still don't know what happened. I disassembled the engine and found a ball of a bearing witch got smashed between the piston and the head. None of my tools got damaged nor were there any bearing parts on my work bench so I have no idea where the ball came from.
I took the engine apart and found a lot of evidence of this not being the first disassembly, so clearly there was an incident before. At this point I still don't know where the ball came from and I hope to find out when I disassemble the supercharger witch won't happen before September. I took a look at the o-ring of the oil pump and it was in reasonable condition. However the rod bearings were a disaster. I found 6 spun bearings on 3 journals. This engine was about to grenade. The crank is reusable, but will need some work.
The car is from 11/2003 and has 130000 miles. It has been stock for 128000 miles and is running a 76mm pulley with a heat exchanger. When looking at the interieur and the state of the bores there is nothing that indicates it has more miles.
I included some pictures of the damage, spun bearings, engine storage and the car in it's previous condition.
Thanks for sharing the grief. A highly educational and enlightening video.
This can happen to any engine. As the M113 ages gracefully. It is still most reliable and healthy engine I have worked on as a daily driver. Racing engines are in a class of their own..
Most US engines from pre EPA restrictions used a press fit sump tube into the pump with a vibra-tite sealant. the pipe also bolted to the crank main cap. Ford notably used a bolt on sump to the pump and micro thin gasket.
I will remember this post for the next M113 opened for mods.
Cheers, Gator
Last edited by GatorMB; Jul 9, 2018 at 12:08 PM.
Reason: added content
However the rod bearings were a disaster. I found 6 spun bearings on 3 journals. This engine was about to grenade. The crank is reusable, but will need some work..
Do you think the spun bearings can be attributed to the failure, or are a separate issue altogether?
Do you think the spun bearings can be attributed to the failure, or are a separate issue altogether?
I think it's a separate issue but more alarming. My engine was tampered with and probably not maintained the way it should so by no means I'm claiming all m113k engines have this issue. However I do think it's a common problem on higher millage m113ks with bad service history. The second engine the YouTuber SK8215 bought had the same issue as mine. Time will tell but it would not surprise me if we see allot more rod problems in the future. Two of the spun bearings in my engine were on their way out, the other four looked surprisingly well. I don't think I would have made the next oil change.
I have a different sump on CLK 55 M113, after reading this thread I may drop the pump for inspection before W211 blower mounting.
Wow what a run on. haha.
Gulp cheers
Newsflash boys and girls! Our as old as 15 year old engines have rubber parts sealing things up. Heat cycles over years. This stuff fails. If you guys have not already done it.... Reseal the oil filter housing to the block. Potential pressure fed leak. Front and rear crankshaft seals. Cam cover gaskets. Crankcase ventilation hoses... Regular maintenance. Want a Camry that doesn't need this stuff? Buy one of those and lose a bit of your soul every time you drive it. Otherwise.... We are driving the naughty force-fed German toys! They require some babysitting.
Newsflash boys and girls! Our as old as 15 year old engines have rubber parts sealing things up. Heat cycles over years. This stuff fails. If you guys have not already done it.... Reseal the oil filter housing to the block. Potential pressure fed leak. Front and rear crankshaft seals. Cam cover gaskets. Crankcase ventilation hoses... Regular maintenance. Want a Camry that doesn't need this stuff? Buy one of those and lose a bit of your soul every time you drive it. Otherwise.... We are driving the naughty force-fed German toys! They require some babysitting.
That's the way it is. My best advice would be to install an oil pressure gauge. There is no warning when things go wrong and once your engine is done 5k is nothing.
Want a Camry that doesn't need this stuff? Buy one of those and lose a bit of your soul every time you drive it.
Haha. I would definitely recommend having a Toyota and an AMG.
Despite the evidence there are nowhere near high enough numbers to support this being a real problem. Even M156 headbolts being a well recognised issue are still pretty rare. It might be that all of our cars have slightly spun bearings and it just isn't causing a problem during the life of the engine unless you have a twin charged, pushed to the limits, track destroyer. As mentioned, anyone who is worried should install a pressure gauge. I will probably do it in the next couple of years. In the mean time I will pretend that very low mileage and not using the car much will save me.
These cars are pushed pretty hard all around the world. I think the only real failures have been due to fuel pressure dropping, which seems to be a symptom of the recall pumps and incorrect wiring (correct wiring solved my problem).
Just for a heads up folks. The gaskets used in manufacture of lubrication system are prone to fail no matter.
I recently resealed a newly acquired CLK55 NA M113. These seals are from the oil cooler housing which is shared with M112, M113, M113K. They loose elasticity like valve cover gaskets, A heat n cool process that never ends
The oil pickup tube might have been crystallized with heat but should not have broken in its orifice.
I like the video for presence of common failures among these engines in general.(well Narrated)
Best, Gator
I am coming into this late, but perhaps I can dispel the fears of those coming to it later. This "Not!" a design flaw and it is "Not" a fault of the O-ring.
This an over heat problem.I have seen a lot of O-ring failures like this in engines and hydraulic systems. This hardened O-ring was definitely cause by massively over heated oil condition, and it happened over time. He has been racing it, but that in itself should not have cause the problem.My educated guess from 50 years of building high performance engines and repairing everything from lawn mowers to battle tanksis that this is a problem with his oil cooling system.Your engine oil temperature should remain at approximately the same temperature as your coolant temperature (the water in you radiator).The more horsepower you force an engine to produce, the more critical oil temp control becomes. Horsepower is created by heat, the more heat the more power, the more power the more heat. That is why Mercedes and other performance car makers add an auxiliary oil cooling system to their performance cars..Most heavy diesel engines have a water cooled system as do some cars. Most hydraulic systems operate at higher temps and are almost invariably air cooled, they also use a different oil to handle the higher temps. Mercedes has an external oil cooling system like the one pictured, not all models may be exactly like this one, but this is an example from an '05 E55.Notice the small square radiator? This is usually located on one side of the car just behind one of the screened air scoops in the bumper.Most but maybe not all, (I haven't seen them all) also has an electric fan behind that little radiator.In some I have worked on, the motor is stuck and will not turn. They are in a major hostile environment, down at the bottom of the car just in front of the tire, sucking in water and dirt and every nasty thing you drive the car through. Nobody pays attention to them and 99% of people don't even know they are there because you don't see them.. If you have one of these cars check them once in a while to see if they still spin free and the fan motor is working. If you are using the car as a driver and only street race it occasionally, the fan not working won't be much of a problem. If you are racing it, especially for long periods where the oil does not have a chance to cool down by itself, that cooling system not working will destroy your engine. This engine failed from overheating the oil which caused the o-ring to harden and crack, but I doubt that caused the problem it is just s symptom of the oil heat. Most likely cause was a combination of the deterioration of the oil from over heat (it had the lubricating properties of heated water) causing the metal to swell, the rod bearing with the least clearance contacted the crank first and is the one that seized first bringing the whole engine to screeching halt.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
