that is exactly what a engine i had looked liked out of a vette. i was going to cam it. i was told it would be fine. but like everyone else i was skeptic. sold the engine b4 i ran it.lol

 

Please look and tell what you think of my front bearing, is it necessary to replace it? We don't have any good shops in here so, after reading some threads, it appears to be risky?? Should I just leave it as it is?

 

The first pic, the scratches at the top position look more like gouges!

I'm not a bearing expert but I would focus on those since it stands out like a sore thumb.. Superficial swirl marks that you can't feel are normal..

Replace it is the best answer

 

Yes that's why I posted these pics... other bearings show some copper (which as i read is normal) but no scoring like this. I'm afraid to screw things more rather than fix them
BTW with new cam (slightly smaller diameter) clearance is going to be .004" on number 2 and 3, and .0045" on first one

 

There's nobody in your area that can replace them?

Now is not the time to cut corners, I would just wait till you can replace them..

I went through this as well, I kept making threads asking people about my engine because I had a lot of concerns and worries that were bugging me.

Some of the advice I didn't want to hear lol

I just replaced brand new ls9 head gaskets with .060 cometics, 2 day setback and $100 wasted ls9 gaskets, new $160 cometics and I had to tear everything apart again..

Welcome to car building

 

clean up the gouges with some 2000# grit sand paper and run them. I've got up to 0.0067" clearance on mine and still have 55-60 psi hot idle. Cam bearings are not as critical as main/rod bearings.

 

It will increase clearance even more though, do you think it's still better than leaving as it is? Do you think this gouge or 2 will break oil film?

 

if the gouge can be caught with your fingernail, then I would smooth it out and re-measure the bearing clearance. You can go up to 0.006ish and run it.