My 05 Ford diesel had a failing egr cooler that I put off too long too long and it finally quit. I started the truck and drove about a half mile, shut it off, came back a couple hours later to head home and clunk, wouldn't crank, I was parked on an incline and the cooler leaked coolant into the right bank of cylinders and hydrolocked the engine. Well I pulled the glow plugs avid cranked it over blew the water out and replaced the oil cooler and egr cooler which for those not familiar required removal of turbo and intake manifold. After I got the whole thing reassembled I went to crank it up and it was cranking slow and uneven. I charged the batteries to make sure they were hot and tried it again, same results, won't start. I posted on a ford truck specific forum and most agree that simply attempting to crank one time with the starter likely wouldn't bend a rod and even if it did it should still crank at normal speed and start and knock. I took a short video of me cranking the truck. Anyone have an opinion on what problem may be? Others have said pull starter and have it tested, I may start there and hope for the best.
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