Hmmm... I'm still a little dubious what caused your lifter to bind up and not allow oil through? the only thing I can think of would be the push rod not in the cup on one end or the other... There's a few things that could have caused that... One of them is a failing lifter.
I hate to be mr. doom and gloom, and maybe it just jumped out of there due to too little lifter preload when the oil pressure is low... In any case I would seriously inspect the pre-load and take the rocker off and see if it's maybe cracked or fatiqued or something wierd is going on. The rocker shouldn't click... that almost sounds like it was bound up on the bridge somehow... if so why was it bound up? You said it ran well then started running poorly... I think you may have fixed a symptom and the thing that caused it is still unknown...
the rocker did not click, the lifter made the clicking sound when i tapped it. the rocker assembly is fine with no cracking bends or binding, the bridges are new and i made sure they were straight and even. it ran better once the lifter pumped up because it could then open my #3 exhaust valve all the way i guess. there is no noise anymore and the oil is metal free after i drained it as a precaution to what you posted before. i think i just got some luck, or this is a volcano waiting to destroy my engine , i have been keeping a close ear and eye on it so we will see
cool I'll stop raining on your parade, I didn't understand that the lifter made the click.... maybe it was just stuck, wouldnt be the first one. Anyway let us know how it turns out...
I have heard of his situation happening.. possibly a piece of dirt or it was just a bit tight. i had one lifter that didn't bleed down after checking preload once and another one that was assembled wrong, which ran for 300 miles then lost pressure, bent a push rod and damaged a rocker arm.
its cool, i was just as amazed as you guys. i cant explain it, all i know is that the rocker is getting oil now and the noise is gone, and shes running like a champ:rockout:
Nice, I hope to have the same luck that you just had.
Been having a concern with a cold start noise that sounded like a lifter pumping up for one second and then continues rhythmic ticking after that. This started after 6K on a new 4.6L. I'll pull the cover this evening and see what I find.
After reading your thread this seems to make sense of a stuck lifer cup. If the cup is stuck in a certain position, I would them assume that it could bleed down overnight causing the full bleed up the next day with all the noise since the spring and cup are not moving at the initial start.
If it is only on cold start up for a few seconds I wouldn't worry about it too much. Its the lifter bleeding down over night. You can try changing the oil grade/brand and try using a different oil filter.
Comp Cam and lifters
Duration: Intake: 210˚@ .050” Exhaust: 218˚@ .050”, Lift: Intake: .477” Exhaust: .493”
Valve springs - I know that they are heaver than OEM but not at home to take a look at the build sheet.
Oil when the noise started was RP SL rated 10W-40, current change was to VR1 20W-50 with no improvement just wanted to try it out and will go back to RP 10W-40 and will be looking for a good SL rated 5,10W-30 synthetic.
Pulled the valve cover off last night and hit each rocker with a small dead blow before start up. Well no start up noise this time but we'll see in the future. rhythmic tick was the same. Valve cover is staying off until Friday as I have a set of Yella Terra's showing up to see if things quiet down.
These are the no adjustable but hope the shims will cover the lash requirements. One interesting thing is that when I ran the engine last night I marked every push rod with a marker to see how they were spinning. 80% of the rods were spinning very fast and the other 20% were going like a second hand on clock (slow). I assume this is due to the none adjustable lash with the OEM style rockers but is there any concern here?
what caused your lifter to bind up and not allow oil through? the only thing I can think of would be the push rod not in the cup on one end or the other... There's a few things that could have caused that... One of them is a failing lifter.
, i have been keeping a close ear and eye on it so we will see
