Ferm and other vortec guys I need help!

[THEFERMANATOR]

pull the rocker arms and retest. i've seen this twice back when ethanol 1st hit the pumps. the goo in the tanks at the station gummed up the valves which hung them open, and allowed the rocker to kick off. a collapsed lifter normally will not hang a valve open, or cause a rocker to fall off the valve stem. sounds to me like a gummed up valve caused the valve to stick open, and give enough play to allow the rocker to kick off. also, replace the pushrod while your there. i HIGHLY DOUBT a collapsed lifter caused this.

[Stinky_Hooker]

I don't think the lifter cause it either that's what I was trying to say about a possible burnt valve. I was thinking a burnt exhaust valve that stuck closed may have cause the lifter to collapse. You think that could be the root cause....a burnt valve? It would also explain the lost compression?


So you're saying pull the rockers and retest compression?

[smokeonthewater]

Carbon build up on the valve stem.... Decarb time.

OR IF the valve already contacted the piston it may be bent.

[Stinky_Hooker]

Had to take a break to gain my sanity. Working on getting down to the intake and getting it off. Dad walked over and checked the push rod and confirmed the lifter has definatly come apart or is trashed. He'sbuild aa lotof small blocks in his day so I'm working on getting down to it now.


I HATE mechanic work!



... side note: I noticed today that if you have grease on your face it bothers everyone around you much more than it bothers you personally.


back at it will report back later if I don't take my own life.

[Stinky_Hooker]

Two bad lifters...on different cylinders. I'm wondering if dirty oil or additives has caused the other failure. I'm bout to pull the head and all the other lifters and check them

[smokeonthewater]

If it makes you feel better you aren't alone... I've been hit hard by the plague!
Two engines and a transmission ($4000+) in my diesel dually in 105 miles!!!
Yes you read that right.....
Engine cracked a piston.... Found a replacement and somehow managed to drop a nut into the head during installation.... Made it 100 miles before the nut lodged between a valve and seat..... Repaired engine, two new pistons w rings, one rod, all new rod bearings, a head, head gasket, and head bolts..... For it together and in 5 miles the trans locked up and slid me to a stop.... Been working on this damn truck since August!

Just pulled it out of the shop again tonight.... Have a couple loose ends to tie up and then I'm doing a trans, t-case, and header on the jeep... Then gotta get geared up for a 1000 mile trip to TX for a new job..... Wheeeeeeeee

[THEFERMANATOR]

Post up a picture, but it sounds like SEALED power lifters to me. Had this happen to me twice before I learned my lesson about using them.