Originally Posted by LuxuriesPremier
hhmmm im gonna hope that i can do what you said bill and have the oil pan dropped and the bearigns replaced. Is that a job me and my dad could tackle or is it very complicated?
Here is the problem with dropping the pan and changing the rod bearings. Usually when you spin a bearing, the oil gallery (passages through which the oil moves in the engine) gets a load of little pieces of bearing material from the bad bearing that moves to all the other bearing journals causing damage and possibly blocking the normal flow of oil.
Every 3800 I have repaired with spun bearings had lots of this debris floating around the block and heads that required disassembly and careful cleaning to remove.
Also, if you have a rod knock, you almost certainly have a damaged crankshaft journal, and maybe a distorted big end on the rod. It is very likely that a new bearing is gonna develop clearance quickly (and produce debris) when you install it on a damaged surface.
You might get lucky and effect a fix that quiets the engine temporarily. But that same journal will fail first and probably quickly, and all your work will have been for little benefit. You surely would not want to buy a car that had been repaired that way.
The fix is: Pull the engine. Disassemble and clean it. Pull the affected rod and have it checked and trued if necessary at a machine shop. Install a crank kit (reground crankshaft with new matched main and rod bearings.)
Or...just swap out the engine with a good junkyard motor. That is almost always the least expensive practical fix.
Thats my .$.06