stewdy1

iTrader: (3)

Ok so my cam walked on me and chewed up some lifter rollers, on the lifters that got messed up they were tough to get outta the block, but the other lifters that r still in good shape they came out easy, why is this????

Is my blocked junk or is it just the lifters causing this???
Already have to change cam and lifters, really don't wanna mess with block if I don't have to

NVR_SPDS

iTrader: (39)

What do the lifter bores look like? Are they scored at all? Were the damaged lifters just snug when you were pulling them out, or did you have to force them out?

stewdy1

iTrader: (3)

They were pretty tight I had to pull them out with a pair of needle nose

stewdy1

iTrader: (3)

Just went out and checked and the lifter bores are scarred up pretty good

stewdy1

iTrader: (3)

So basically I need a new motor right??

JPH

iTrader: (2)

cam tunnel might not be straight/parallel to/with lifter bores. Take it to your local machine shop and have it inspected.

NC98Z

iTrader: (1)

I believe what your trying to say is your cam bearings walked on you. If thats what your talking about then you will have to pull the motor and get it line bored and new cam bearing installed. I would not recommend letting someone just trying to replace the bearing the way it sits. I did and wound up paying for it in the end. Your probally looking at a complete rebuild because of all the metal chewed up by the valvetrain. Sorry!

stewdy1

iTrader: (3)

I don't think it's the bearings, I can move the cam back and forth 1/4 I'm pretty sure the cam bolts backed out

SweetS10V8

iTrader: (4)

Comp Makes what you need(ed)!!

http://www.compperformancegroupstore...Category_Code=

stewdy1

iTrader: (3)

Ok got motor out and apart and the bolts did not back out,
The retainer plate is destroyed!!!

What causes this

Steve Gunn

Agree. Your block is probably junk. Mine was.

vettenuts

iTrader: (4)

That is the new retainer plate (countersunk holes). Which bolts did you use and what torque value. If you installed a new cam plate with the old bolts and/or old torque value that is why the plate cracked.

Here is more information: Link #1 Link #2

stewdy1

iTrader: (3)

No this is the one without counter sunk holes. I have a newer one with the countersunk holes so I know what ur talking about. I didn't torque the plate just tightened it up, is it that big a deal about torturing it ???

vettenuts

iTrader: (4)

If you didn't torque it then you don't really know how tight it was. If overtightened, it might have resulted in the cracks but hard to tell since the amount of over tightening (if any) isn't known. I would say get the same non-countersunk plate (available in one of the links I posted) and use a good torque wrench when you re-assemble.

crainholio

iTrader: (2)

The torque spec on the retainer plate bolts is really light, around 18 lb/ft if I recall.

And ensuring all 4 bolts have the same (correct) pressure on them is critical, as you just found out. If not, the plate is being twisted and can fail.

Some people choose the School of Hard Knocks and learn the hard way. It isn't cheap or fun, but I suppose some find it more fulfilling than reading a book.

sepsis

iTrader: (7)

You just can not skip torquing the bolts of an engine properly. There are sequences and guidelines that must be followed. Plain and simple.