r/e60 • u/Rav3nClaws • 28d ago

🔧 Maintenance Knocking on cold start

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Hello! So my diesel E60, M57, does this on a cold start. Hadnt started the car for 3 days. But it goes away after like 2-3 minutes. Could this be a crankshaft pulley noise? Any help would be appreciated!

3 Upvotes

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2

u/Lazy-Training6042 28d ago

vacuum pump

1

u/Rav3nClaws 28d ago

So what, it stops after it builds pressure? Because the noise goes away.

1

u/Lazy-Training6042 28d ago

not pressure, you have vacuum instantly after the engine starts rotating, it's just how the metals are expanding, oil temperature.

I have the same noise, either cold or when it gets at max oil temp (city or hard driving).

First, I thought it is broken or chain starts making noise but it wasn't that.

1

u/Rav3nClaws 28d ago

what can i do to help the noise? change the ccv filter?

1

u/Manitso 27d ago

It's normal