has anybody had any problem with the ls6oil pump. i installed one this weekend. my oil pressure while the engine is cold is at 40psi. when the car starts to heat up it goes down to 20psi or less? anybody knows what could be wrong?

 

The o-ring that goes on the pick up tube more than likely isnt seated correctly. Did you check to see if it was pinched anywhere around the pick up tube? Do a search for o-ring & you'll find a ton of info.