A quick Google search shows that people have posted about spalling of the exhaust cam lobe(s). Typically, it's found on just 1 or 2 lobes and always just on the exhaust cam -- as is seen on my engine. About 80k miles ago, the timing chain and everything that touches it was replaced, including the VTC Actuator and VTC Solenoid. No visible problem with the cam was seen at that time.
I always run 30 or even 0w40 in this car. I have always ran high grade oil -- Mobil 1 or Renewable Lubricants. After the timing chain change, I dropped my OCI from 9k miles back down to 5k.
I'm a little disappointed in finding this.
You think I should just run the car as is until it starts to run poorly? It runs great still, but there is a tapping noise coming from this problem. I'm not sure I want to spend $1000+ fixing this issue on a 13 year old car with 250k miles on it that has slight front end damage from a deer collision.....
How is the top-end of your engine so nasty?A quick Google search shows that people have posted about spalling of the exhaust cam lobe(s). Typically, it's found on just 1 or 2 lobes and always just on the exhaust cam -- as is seen on my engine. About 80k miles ago, the timing chain and everything that touches it was replaced, including the VTC Actuator and VTC Solenoid. No visible problem with the cam was seen at that time.
I always run 30 or even 0w40 in this car. I have always ran high grade oil -- Mobil 1 or Renewable Lubricants. After the timing chain change, I dropped my OCI from 9k miles back down to 5k.
I'm a little disappointed in finding this.
You think I should just run the car as is until it starts to run poorly? It runs great still, but there is a tapping noise coming from this problem. I'm not sure I want to spend $1000+ fixing this issue on a 13 year old car with 250k miles on it that has slight front end damage from a deer collision.....
This is an excellent question. Something isn't adding up, as that's a lot of varnish, even for extended OCIs, on synthetic oil.How is the top-end of your engine so nasty?
Follow the post by Javier. You can see the camshaft is varnished worse around the cam lobe with the issue than the others. You need to confirm you have sufficient oil flow matching the rest of the camshaft.A quick Google search shows that people have posted about spalling of the exhaust cam lobe(s). Typically, it's found on just 1 or 2 lobes and always just on the exhaust cam -- as is seen on my engine. About 80k miles ago, the timing chain and everything that touches it was replaced, including the VTC Actuator and VTC Solenoid. No visible problem with the cam was seen at that time.
I always run 30 or even 0w40 in this car. I have always ran high grade oil -- Mobil 1 or Renewable Lubricants. After the timing chain change, I dropped my OCI from 9k miles back down to 5k.
I'm a little disappointed in finding this.
You think I should just run the car as is until it starts to run poorly? It runs great still, but there is a tapping noise coming from this problem. I'm not sure I want to spend $1000+ fixing this issue on a 13 year old car with 250k miles on it that has slight front end damage from a deer collision.....
I'm not sure ...How is the top-end of your engine so nasty?
Wonder if the extra additives you've been adding, are compromising the performance of the final mixture.I'm not sure ...
Yeah, there's no way that should be this ugly.Wonder if the extra additives you've been adding, are compromising the performance of the final mixture.
What were your OCI's on this car?I'm not sure ...