R56 What does this mean?
#1
#2
#5
If it is actually cam wear then changing oil brands at this point isn't going to help. Also the cam lobes are splash lubricated so oil pressure doesn't enter into this: if there were an oil flow problem you'd see it at the main bearings long before the cam lobes.
The brown stuff is just oil tarnishing & build up as Maybe noted. It's a bit more than I'd like to see so maybe better oil or more frequent oil changes might have helped, but the engine also has 160K so...whatever. Maybe that's normal for the N12 at higher miles, it's not like these are Hondas. Anyway there's no thick gunk or chunks of carbon in there that I can see so also probably not worth worrying about.
#6
Would highly disagree, if there is insufficient oil pressure, then it's possible there is no oil in the upper end of the engine to "splash" around. Also, these N series engines have problems with bits breaking off of the timing chain guides; those bits get caught in the oil pump inlet screen and can restrict oil flow. With reduced flow, there might be sufficient oil pressure for the lower end, and but the upper end could be starved since the oil has to flow up to the cylinder head. However, since the VANOS system uses oil pressure as a hydraulic medium to alter cam timing, if you did have an oil pressure problem in the upper end of the engine, I would suspect to see VANOS DTCs set. Use an oil pressure gauge and removed the oil pressure switch on the left side of the cylinder head. The new oil pump I have in my recently rebuilt '09 N12 engine puts out 10 PSI at idle with the oil at operating temp. I believe the minimum oil pressure is 5 PSI at idle.
The point of the restore and protect oil was not to make any attempt to correct mechanical damage to the camshaft lobes since an oil can't perform that function; the point was to clean up deposits as Valvoline has developed a new molecule that will clean carbon deposits as it lubricates and cools the internal engine components.
Suggested viewing.
The point of the restore and protect oil was not to make any attempt to correct mechanical damage to the camshaft lobes since an oil can't perform that function; the point was to clean up deposits as Valvoline has developed a new molecule that will clean carbon deposits as it lubricates and cools the internal engine components.
Suggested viewing.
#7
Would highly disagree, if there is insufficient oil pressure, then it's possible there is no oil in the upper end of the engine to "splash" around. Also, these N series engines have problems with bits breaking off of the timing chain guides; those bits get caught in the oil pump inlet screen and can restrict oil flow. With reduced flow, there might be sufficient oil pressure for the lower end, and but the upper end could be starved since the oil has to flow up to the cylinder head. However, since the VANOS system uses oil pressure as a hydraulic medium to alter cam timing, if you did have an oil pressure problem in the upper end of the engine, I would suspect to see VANOS DTCs set. Use an oil pressure gauge and removed the oil pressure switch on the left side of the cylinder head. The new oil pump I have in my recently rebuilt '09 N12 engine puts out 10 PSI at idle with the oil at operating temp. I believe the minimum oil pressure is 5 PSI at idle.
The point of the restore and protect oil was not to make any attempt to correct mechanical damage to the camshaft lobes since an oil can't perform that function; the point was to clean up deposits as Valvoline has developed a new molecule that will clean carbon deposits as it lubricates and cools the internal engine components.
Suggested viewing.
https://www.youtube.com/watch?v=kyyZDghgdCI
The point of the restore and protect oil was not to make any attempt to correct mechanical damage to the camshaft lobes since an oil can't perform that function; the point was to clean up deposits as Valvoline has developed a new molecule that will clean carbon deposits as it lubricates and cools the internal engine components.
Suggested viewing.
https://www.youtube.com/watch?v=kyyZDghgdCI
Yeah I’ve had the car for almost 2 years and it’s always made a tapping noise. It’s been getting louder within the last 6 months and I put a new timing chain and guides in. Car still makes the tapping noise and it’s not belt related. I think it’s lifters, but the noise does not get louder rpms and gets harder to hear when rpms are increased. It’s full on oil and I changed it a couple weeks ago. Car drives fine and has no codes besides o2 sensor. I’m just wondering if these marks on my cam indicate anything bad happening. Just wondering what could be resulting in my tapping noise. I’m gonna test my oil pressure and see if that’s the issue.
Video of noise:
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