this part located at the very bottom of the rocker arm of the rocker assembly.No picture
these are pictures of your cams?BINGO! This is making noise on my car! this is exactly what I have but not heavy like this! Just read online this is causing the ticking noise! It could be a defective part all along when the car was new but it was so bad and it get worse over time and started making ticking noise. Damn that is my problem!
Dealer says replace Camshaft and Rocker(s) - Page 2
How many miles does your MDX have? Any extended warranty? Are you the original owner? Is it possible the engine was run low on oil or changes were not done regularly?
The pictures you posted (I understand these are not yours) are quite severe and warrant immediate replacement.The good news is the ticking/knocking noise is not related with the engine ( pistons, rings, bend valves ). This was confirmed when I tried to disconnect the coil one by one and no change in noise. After I adjusted the valves the Ticking/knocking noise seems to quite down a little but not eliminated. If the camshaft is permanently worn (minor or severe). The worn on mines is minor. why would the valve adjustment make the noise less quieter? At this point I not going to do anything, not going to replaced the camshaft. If the noise will get louder then I re-evaluate the situation. For the past 2 years the ticking/knocking noise pretty much remains the same, not louder.
The pictures you posted (I understand these are not yours) are quite severe and warrant immediate replacement.
Without seeing your specific camshaft, I cannot comment.
Probably due to Variable Cylinder Management (VCM).I will probably open the front valve cover again to check for more worn camshaft. Question. Why inside the front valve assembly has very dark oil stain compared to the back side. The back valve assembly look almost it doesn't have any dark oil stain at all. Is it because the front cam running hotter and generating a lot of heat and friction? I read online and most of the worn camshaft are from the front.
https://www.acura.com/rdx/modals/variable-cylinder-management said:Variable Cylinder Management™ (VCM®) automatically changes the V-6 engine to run on six or three cylinders, depending on driving conditions, resulting in significantly improved highway fuel efficiency.
- During startup, hard acceleration, hill climbing or when high output is required, the engine operates all six cylinders. At low-speed cruising on city streets, the engine will shut down one cylinder bank (which has three cylinders on one side of the “V”) and operate on the remaining three cylinders.
- Active engine mounts improve engine smoothness while the engine is running on three cylinders.
- The system monitors throttle position, vehicle speed, engine speed, gear selection and other factors to determine the correct cylinder activation for the operating conditions. The system also monitors catalytic-converter temperature to make sure it remains in the proper range to keep emissions low.
Why would your camshaft be bad?
Can you search a picture online showing the condition you have?