Engine Rattle when coming to temp on cold start

[exodus.eco]

On cold start when the car starts to lower in rpm and idle there is a very brief rattle that happens for probably 2-3 seconds and then is gone. I was wondering if this is normal or if anyone has insight on this? Otherwise the car drives fine

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[Ecto1]

How many miles? I'm wondering if this might be a valve train rattle from carbon build up on the valves.

 

[exodus.eco]

How many miles? I'm wondering if this might be a valve train rattle from carbon build up on the valves.

Brand new engine. Believe it was just the oil pump

 

[Jaymar]

How many miles? I'm wondering if this might be a valve train rattle from carbon build up on the valves.

Were you just waiting for an opportunity to say "carbon build up?"

There is also a rattle right on startup as the high pressure fuel pump comes up to pressure. The best I can describe it is it sound like an old tractor for a second or two. It's perfectly normal.

 

[exodus.eco]

Were you just waiting for an opportunity to say "carbon build up?"

There is also a rattle right on startup as the high pressure fuel pump comes up to pressure. The best I can describe it is it sound like an old tractor for a second or two. It's perfectly normal.

Ok thank you

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