Knocking from top end?

[tweeder]

I have a 90's 3800 swapped buy a previous owner. The bottom end
was supposedly done a few weeks ago. There is one or two knocks
when it's fired up then as it gets warmer it will become more noticeable.
That and when revved a few thousand rpms, but will go away if letting
off the throttle. I took a stethoscope and it sounds like its coming from
the front left( when standing at the back and looking forward). So I
pulled off the valve cover and all looks fine no broken rocker or spring.
Maybe a lifter?

[tweeder]

Pulled the pan and it's a connecting rod bearing.  I will replace it and
hope it lasts another month and a half intill it gets parked and the
3800sc gets swapped in.

[aaron88]

Sounds like you have it under control now.  That kind of noise is almost never okay.


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