Strange noise at engine warm up

[nghiaho58]

I have a question regarding a strange noise of my 2000 C2 Cab.

When I started my car and let it warms up in the morning (car at park) I hear a strange noise (don't know how to explain) in the engine bay. It seems like the noise is coming from the motor or pump (?) at the lower left corner of the the engine bay. This strange noise happened only for about 1-2 minutes and it went away and engine runs as normal as its temperature reach toward 180.

Do you know what is this strange noise and is it normal or it indicates something is going wrong? In addition, what is the device (motor or pump) located at he lower left corner of the engine bay?

Thank you in advance for your help.

Nghia

:renntech:

[Loren]

Normal - emissions air pump. Sounds like a mini vacuum.

It might also run for a few seconds when you come off the freeway and idle.

[nghiaho58]

Thanks Loren!

You are the best :notworthy:

[Joel Pirela]

****, I forgot how ugly is the original airbox! LOL

Look at this beauty: (on my 996!)

[goldenwarrior1]

Definitely nicer than the stock unit but it’s hard to see with the lid closed :P

[nghiaho58]

****, I forgot how ugly is the original airbox! LOL

Look at this beauty: (on my 996!)

It looks different than the original air box but that does not make the original air box looks ugly ;)

[Joel Pirela]

:)

[rrspikemarty]

****, I forgot how ugly is the original airbox! LOL

Look at this beauty: (on my 996!)

Very nice appearance. Incidentally, does it have improved airflow wrt stock box?

[Joel Pirela]

Just for look. but the car sounds a little deeper at low RPMs. It looks more efficient from the inside...