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^^^This.What is the story with your engine?
Normally, I'd jack you up about "What Vehicle". C, K, SUV, Van, etc? But in this case it doesn't make any difference.does anyone know if the crankshaft can be replaced with the engine still in the truck on a 96-99 5.7?
Ok that sounds like a valid reason. And to answer what everyone is asking, the engine already has the top end done on it within the last 20k miles along with the bottom end bearings but we did see damage to the conn rod bearings upon replacement which i believe was caused by excessive run time on a bad cam position sensor. Motor has awsome compression, no smoke, no oil consumption but now the oil pressure has dropped again (not to 0, it doesnt drop below 20psi on hot idle and cold idle is 40) and im hearing faint signs of the rod bearings going bad again due to the damage the crank journal suffered initially so im considering buying a reconditioned crank and matching bearings to cut down on my down time and not have to wait for machine shop. Which is why i was trying to do the work without pulling the engine. So im mostly trying to save time but the rods interfering does bring up a valid point. In all honesty the engine still is very drivable and im just being very meticulous and there is no metal in the oil and the sound only happens on initial startup after its been sitting for a while. Ive heard many engines run making way more noise and this makes way less noise on startup than lets say a hemi lol and yes i know hemis make the noise due to the lifters but just to give an idea.You can't push the rods up far enough for the bolts to clear the crankshaft without removing the heads, and at that point you might as well pull the engine. If you can tap the rod bolts out, you gain the clearance to swing the crank around, but then you get the fun of trying to get the rods and pistons back down without marring the crank. It's far better to remove the engine.
Why would you want to replace the crank in-truck? Why does your crank need replacing?