Isx15 2350 knock.

[Beardedtrucker]

So lately I’ve been experiencing a knock on the turbo side on cold starts. Once the oil temp has come up it goes away. So it last a good 10 minutes and sounds pretty nasty. Isx15 2350 575k miles. Deleted.

Everyone says it’s fuel related, but I keep going to haggai and my fuel system checks out. Last visit to check out fuel was 3 weeks ago. I hate to keep bugging them due to my paranoia. The knocking happened after a trip I took and noticed it. Before that trip the harmonic balancer was replaced due to general maintenance. I got the advice to change it from my last post on concern of a weird vibration. I didn’t change the balancer a shop did. Could that be the reason for a cold knock? Thanks.