it had new pump 2,000 miles ago

the car has had everything new, new driveshafts, new cam belt, new fanbelt, new alternator, new starter motor, new tca's, new box, new clutch, new linkage i could go on forever but believe me its had everything changed and i mean everything. one thing thats original is the engine, which was un-touched maybe it just had enough of being neglected for 167,000 miles

i just dont understand why, compressions were fine but it gave up???