Death Rattle?

tiltsix said

Ok so my 2001 Dakota now has 250000 miles on it and runs great,however on first start of the day it has a very scary bearing rattle.It shuts up after a few seconds and all is fine. My question is is there a product that I can add to the oil to quiet it down and buy a little more time or should I pull it and rebuild.......3.9 with auto..new oil pump at 190000,very good oil pressure till warmed up then just average (20 lbs) on aftermarket guage..................................................Thanks ..........................Jeff

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An oil pick-up isn't going to cure any start-up noises unless it's clogged or cracked, so that leaves You with this;
1)You have excess drain-back, poss. causes are a) filter not equipped or poor quality anti-drain-back valve, b) excess clearances in pump &/or pressure relief valve failing to
close completely, c) overall excess clearances where a heavier "warm" viscosity may help.
2)You have a lifter that has taken to bleeding down on the ramp or nose of the cam lobe & needs a few to pump back up, again a change in viscosity may help.
3)You've got a loose rod that simply will take a moment to shut up, viscosity hail-Mary aside, nothing but new shells is gonna stop that.