NSX-Tuner

Has anyone else noticed that the '03 CLS 6sp valve train noise is a bit loader and/or noticeable than the CLS auto? The reason I ask is I had an '01 CLS that didn't seem quite as loud.

When I'm next to a curb or wall on the driver's side, I can hear the valves and/or valve train in a way that seems excessively load, kind of a ticking/tapping noise. I also can hear the same noise when rolling to a stop, although not quite as pronounced. Do you think this is normal?

Zapata

i hear this as well.....and yea a bit more pronounced on the MT than the AT.

NSX-Tuner

I noticed it before, but after doing a few low to high rev runs where I hit the rev limiter several times, it seemed to become a little loader. But I think it may have just been the fact that I was feeling a little concern and/or paranoid about hitting the rev limiter. Kinda like the F1 drivers who start imagining engine noises that are there the closer the get to the finish of a race.

I'm due to bring the car in for maintenance, so I'll register this issue to make sure.

allmotor_2000

Honda's are notorious for this... although its more pronounced before the engine is at normal operating temp. However... it shouldn't be too loud.

I tightened my valve-lash a bit... less noisy but increased wear on the camshaft - might give 1-2hp too.

Klamalama

I've noticed this for a long time. It does it mostly when re-starting. Hot or cold makes no difference. It sounds typical of solid lifters with a lot of play in the valve train. It's likely deliberate to allow for heat expansion but it still does it hot.

BTW, I hardly ever take it to the rev limiter.