i just aquired a year 2000 5700 vortec engine from a 2500 truck. owner swapped me for a box of ammo because i wanted the heads off it. he gave the entire engine. it had a intake gasket leak for about 2 months and he was driving it.(very very stubborn starting
) it developed a knock, the mechanic said the oil was dilluted and the engine was compromised. he had a backyarder change it out for a boneyard runner and this grungy old 150,000 miler was kicking around. i tore it down and the 6 and 7 connecting rod bearings were completely gone...clickity clack. there was 3 main bearings spun and the rear main bearing was in the proccess of shredding. the crank was toast.(measured 1.981 on 6&7 connecting rod journal
) two of the 3 compomised main bearing journals had almost no metal left from the bearings on the cap side and a little scuffed on the block side with some material still left smeared into the block. pistons looked great and cylinders...they are a shame to waste! fuel injected cylinders are new to me! wow!. also to my suprise it has 3 of 5 main caps are 4 bolt main caps. i didnt know this about the vortecs. so i got excited and before i get my hopes of having a 4 bolt 350 on the somewhat cheap, is this normally something that can be rebuilt or is this junk pile fodder and a score on some vortec heads? i thought about wanting the lifters but they had some metal shavings in them...cleanable or crap?