reciently just built up a 351C 2V. put a new cam and lifters and timing chain in. also had the heads done with new valves, springs, and retainers. problem being after breaking in and driving once all the lifers are loose but torqued down correctly. theory is that the cam lobes have some how ground down which I will find out for sure tomorrow. Question being how could this happen?
Do you have zinc based oil? Didn’t break in the cam properly. Too high of valve spring loads during break in so the lifters didn’t start rotating. Need to define better what you mean by “all lifters are loose”. Usually if it is a cam lobe problem only a couple will round off first then the motor will start running bad and then you look for a problem. Unusual to have all the lobes round off at the same time. Depending on how bad they rounded off the motor wouldn’t even run.
If all of the lobes ground down that quickly, I’d expect you’d have massive amounts of grit in the engine oil.
Could be too much spring pressure and pulled the rocker studs out, although can’t see pulling all of them out.
new pushrods?
did they resurface heads? pushrods might have been too long and bent?
that is a lot of damage that quick did the oil pump shaft drop out and down?
in recient news the cam is ground down and the lifters are destroyed. what had happened is when we went to do the initial break in the car would just crank and not start. found out it was the condenser. because of all of that cranking all of the lube rubbed off of the cam which made it grind down so quickly.
anyone have any ideas about how to get all of this ground down metal out of my engine?
I know you don’t want to hear this… But, you need to pull the engine and completely tear it down and get it into a solvent tank to clean the inside and all the oil passages including the crankshaft. Inspect all the bearings for damage as all that ground up metal was traveling through the oiling system. Check the oil pump as well.
Did you prime the oil pump with a drill before you started cranking to start the engine? just cranking the engine some before it started shouldn’t have caused the cam/lifter interface to fail. If you didn’t prime the oil pump first then all that cranking dry could have caused you failure.
oil pump was primed. we cranked on it ALOT, starter was also bad.
Agree with BossElim69… Complete tear down and clean out…
I currently have an 0-470-50 Continental aircraft engine down in my shop because it ate a magneto drive in the accessory case… It is getting new bearings, new oil pump, new rod bearings, all new hydraulic lifters, new magneto drive gear, new rocker arm bushings all due to metal contamination. Almost 2 grand in parts… All this because a mag drive bushing was installed incorrectly…
Brian
I would tear it down. I just wouldn’t want to take the chance of MORE loose metal making its way into the rest of the engine. That why I always try to make sure the engine cranks quickly on break in. Not brow beating you as it looks like you have had a bad enough day. If it doesn’t start within a couple of revolutions, then I stop and start looking at what is causing the no start condition. I learned this like you just did: The hard way.