Lee Teicheira, Harvard Holmes and Bill Lawrence finished reassembling engine cooling baffles and checking all connections prior to another engine first start attempt. This time the engine had spark but the timing was still off as signified by the backfiring. After pulling spark plugs to determine TDC and check timing marks and then again setting secondary electronic ignition timing, the engine did start momentarily but was shut down immediately due to a leak in the oil cooler itself.