Dull engine knock after installing new lifters in 97 Qx4

[BKnowles]

After installing new lifters in my 97 Qx4 a dull engine knock developed while driving 1/2 to 1 hour after installation. The oil indicator did not illuminate. All fluid levels were normal. My mechanic was informed and the vehicle will be back in his hands on Monday. I would like some independent opinions as to what would have caused this.

[BKnowles]

Inspected newly installed lifters and found a faulty one. Once the faulty lifter was replaced the noise went away. We did not do a good job inspecting the lifters after purchase. The fault was quite obvious and would have been spotted on close inspection. Lesson learned: inspect parts if possible, before leaving the parts store and/or installation.

[fleurys]

Thanks for the update, but is it possible for you to explain or even better show us what was the problem with the lifter ??