I have a Ford 851 Gas with the 172cid engine.
I got it cheap because the engine had give out (Camshaft Gear broke)
Anyway, Sent the block, crank shaft and heads out for machining. New sleeves, pistons, valves, guides, camshaft, lifters, pushrods, bearings, all of it new. pastigauged the bearings and all are .002" everything went together great. Oil pressure is around 50 PSI and runs smooth when I first started it. Too good to be true lol.
Anyway as I was getting things tuned in and valve lash done, it made a screeching noise and stopped pretty abruptly. I took out the plugs and could still turn the engine over by hand so I pushed the clutch in and held it down with a piece of wood and a clamp. and started it back up and it ran fine.
fast forward, to a few days ago. I was finally ready to try the thing out so I started it up, let it run at about 1000 rpm for a couple minutes put it in gear and drove around the yard and it did the same thing. a squeal and then abruptly stops running.
I just got down taking the head off, checking all that no issues or out of round or signs of damage in the top end. So I took the pan off and checked each rod bearing and they are all just like new (which they are). I only looked at the main bearing with the caps still on and none of them look like they spun in the journals.
I am at a loss, do I tear the engine down or could this be something in the clutch which i did not replace because the previous owner did it less than a year ago with receipts.
I got it cheap because the engine had give out (Camshaft Gear broke)
Anyway, Sent the block, crank shaft and heads out for machining. New sleeves, pistons, valves, guides, camshaft, lifters, pushrods, bearings, all of it new. pastigauged the bearings and all are .002" everything went together great. Oil pressure is around 50 PSI and runs smooth when I first started it. Too good to be true lol.
Anyway as I was getting things tuned in and valve lash done, it made a screeching noise and stopped pretty abruptly. I took out the plugs and could still turn the engine over by hand so I pushed the clutch in and held it down with a piece of wood and a clamp. and started it back up and it ran fine.
fast forward, to a few days ago. I was finally ready to try the thing out so I started it up, let it run at about 1000 rpm for a couple minutes put it in gear and drove around the yard and it did the same thing. a squeal and then abruptly stops running.
I just got down taking the head off, checking all that no issues or out of round or signs of damage in the top end. So I took the pan off and checked each rod bearing and they are all just like new (which they are). I only looked at the main bearing with the caps still on and none of them look like they spun in the journals.
I am at a loss, do I tear the engine down or could this be something in the clutch which i did not replace because the previous owner did it less than a year ago with receipts.