Noise on cold start

Snotor · Post by **Snotor** » 13 Sep 2018, 02:22

Hello!

I have this noise on cold start (see sound file below)

Shorter noise on warm start. Does anyone recognize the noise and the source of the noise?

The car is a Volvo V70 2.5T 2008 (engine B5254T6).

Noise:

Post by **oragex** » 13 Sep 2018, 04:11

Was it recorded inside of the car? Could it be the fan blower (just switch it off see)

Snotor · Post by **Snotor** » 13 Sep 2018, 04:36

Thank you very much for your reply. I was sitting in the driver's seat holding my cell phone between my left knee and the door open when recording the noise. The noise seems to come from an area under the car, somewhere between the cat and the left front wheel (but this can be just a subjective imagination due to difficulty to identify the location of the noise source). The noise is however less audible when I stand in front of the engine compartment.

Could it be the starter? Or the vacuumpump?

Any suggestion is much appreciated!

P. S. No, it's not the fan blower.

Post by **oragex** » 13 Sep 2018, 05:36

Maybe ask someone to start it while listening inside the engine bay. Depending on the mileage, could be a pulley getting a bit seized or a power steering pump with the wrong fluid in it (must be green color). If I'm not wrong, the serpentine belt tensioner was more fragile after 2007

Snotor · Post by **Snotor** » 13 Sep 2018, 06:03

Many thanks for your reply. I've done what you are suggesting a couple of times. I've been standing in front of the engine bay and the noise seems to come from the area somewhere between the front left wheel and the rear parts of the engine when facing the engine bay. All belts, including timing belt, with tensioners and pulleys were replaced 10 months ago.

Remember, the noise appears on the first cold start of the day only!

Could the starter or the vacuumpump be the source of the noise?

Any suggestion is much appreciated!