2005 Mercedes Benz Timing Chain Noise At Cold Start Up
Hello every one, I have a 2006 Mercedes Benz that the timing chain rattles at start up, no check engine light , this noise is cause by the oil draining from the oil filter housing over night , or if the car sits for about an hour, the oil filter housing was replaced but the noise continues , has anyone run in this before , is there a check valve somewhere? thanks in advance for your help.
What model? Which engine, how many miles? Check engine light on?
Hello Michal , its a 2006 Mercedes Benz e350 , M272 136,000 miles no check engine light, I don't think is related to the balance shaft I removed the oil filter before starting the engine this morning and it was completely empty of oil , and I do believe that's the cause,
You do realize that when you remove the oil filter that most if not all the oil will drain out of the housing ? This is normal. Think about it for a second. When you do an oil change, do the engines rattle ? No they don’t if everything is ok. Your noise sounds more like a chain tensioner or cam adjuster to me.
I had one that was noisey on first start (M272), was from a used car lot. We checked pattern and it showed signs of the usual balance shaft wear. We were shocked it wasnt setting the usual codes. We suspected someone removed the cam / crank sync codes from the flash. We reflashed it with xentry and it set the codes within 2 minutes of idling. We recommended customer prepare for balaceshaft…
That all makes sense, the only question I have is the fact that the oil filter is completely empty of oil after just sitting for an hour, I have compare it to other m272 engines and those engines hold oil in the filter housing even after sitting over night, any thoughts?
I haven't worked on one of these in forever, but looking at a parts diagram, the filter housing cap has an extension on it with o-rings and maybe a check valve integrated into it. Is the housing cap intact with the extension and o-rings in good condition? If you have another vehicle there with the same cap, swap the known good over to your problem vehicle and see if the problem goes away.
Engine had an oil leak from the housing, so I replaced the complete assembly with the cooler, like your self I was thinking possible check valve somewhere