Knock/rattle when warm

350Z2004

MEMBER
2004 NISSAN 350Z
3.5L
V6
2WD
MANUAL
81,000 MILES

My car has a knock/rattle when warm. You cannot hear it when it is cold. It seems to be coming from the drivers side of engine near the pan or catalytic converter. No loss of power or codes. I have maintained the car very well. But the noise is quite noticeable when warm.

Thursday, May 3rd, 2018 AT 6:17 PM

4 Replies

JACOBANDNICKOLAS

MECHANIC
110,068 POSTS

Hi and thanks for using 2carpros.com. A common problem is the catalytic converter. Although it may appear in good condition, there is a chance that the internal components have come loose and it is rattling inside.

Here is a video which explains how to check the converter. Pay attention to the first couple still pictures. You will see an inside which has come loose. Follow the directions and see if that is the problem.

Here is the video:

https://youtu.be/kNXh1Lphzr4

Also, I have attached a picture of what may be the issue.

I hope this helps you.

Take care,
Joe

Image (Click to make bigger)