ProjecT 9

iTrader: (6)

is this normal wear for cam bearings with 72k? I'm in the middle of changing my cam and noticed the wear. thanks in advance.



on the crank i noticed a pattern, is it normal? what is it from?



Jon

CW00BlackTA

iTrader: (31)

Mine were just starting to break through the silver colored layer at about 50K so I don't think it's unusual. Mine is working fine.

Let's see if anyone else chimes in.

CW00BlackTA

iTrader: (31)

The main thing is they should be very smooth with no metal transfer from one surface to another.

ProjecT 9

iTrader: (6)

ya, i was originally taking the pictures hoping i could see the ones in the back better, but it didnt really work. the bearings are smooth to the touch. i ran my finger nail over them to see if i could get it to catch, but it didnt. i seen the wear so i figured I'd ask. thanks man

Jon

gametech

iTrader: (1)

Looks normal, but at 72k miles, why not err on the side of caution?

GuitsBoy

iTrader: (4)

Perfectly fine. Ive seen 10K mile motors that are showing some copper color. Its normal on these motors.

As for the crank, those are simply machining marks.

Bill Reid

iTrader: (14)

Here is a shot of an LS7 cam bearing... prior to the motor even being assembled at the factory. I have seen the same thing several years ago on brand new C5 LS1 and LS6 motors. Note that these motors have their cam bearings line honed after installation... and it does remove surface material... and its no big deal. Key is to check tolerances. If they are within factory specs leave the cam bearings alone... too many horror stories of folks changing them out during a rebuild because the bearings "didn't look right" or "since yer in there"...



Bill

ProjecT 9

iTrader: (6)

i thought the copper was the outer material, and the silver was under it?

ProjecT 9

iTrader: (6)

thanks man, i had no plans on changing them. i just wanted to make sure it looked alright.