2007 Zx-10

How long is chatter noticeable after start-up in your car? Did changing to a high quality synthetic make a significant difference?

4evertopless

split second on my 55kmiles 03....and no


You may have an oil pump problem if its considerably longer than that.

INTJ

Try a valve adjustment first.

2007 Zx-10

The car has 10k miles and has always had some minor chatter at start-up, but less apparent with a good synthetic. After about a minute or two it's silky smooth.

INTJ

If that is where you are at, try the eunos 50WT, quiet as a baby.

2007 Zx-10

haha, 50 weight in an S2000? not...

4evertopless

Ya id say that would even be overkill for a track only car

Slows2k

Search for Timing chain tensioner noise @ cold start. There have been several videos posted of noisy chain tensioners.

2007 Zx-10

I looked up the TCT vid links and that's definitely not the noise. I should go test drive a new '09 and see how it sounds.

Slows2k

There are no lifters or cam buckets, the cam rides on top of the rocker, and the rocker opens the valve.

Like all "solid" cam engines, some noise will be heard from the direct contact between the rocker and valve tip.