FastKat

iTrader: (10)

I bought this off of a board member and was a little surprised when I opened it up. I don't think valley covers "wear" so I didn't really push the condition of the part... however now I am wishing I would have asked more questions. It looks like there are little crack lines over parts of the surface. Would you guys use this LS6 valley cover? Is this normal?



Thanks, -Dave

JMBLOWNWS6

iTrader: (17)

Normal casting cracks. When I cleaned up alot of my parts with the bead blaster they looked the same.

muncie21

iTrader: (14)

Looks like casting marks. I wouldn't be worried.

FastKat

iTrader: (10)

So if they were casting marks... I could probably polish them out, right? Not saying I want a polished valley cover, but just to make sure they're casting marks.

muncie21

iTrader: (14)

why bother? It's a cover, it doesn't really seal anything.

bmfcamaro

iTrader: (1)

my was like that. that is the way those parts look. the thermostat housing is the same.

FastKat

iTrader: (10)

I am doing a turbo setup and am wondering if presurizing the engine block (from blow-by) will cause an issue. I don't want any crap falling down off of the valley cover into the oil pan if it does to start to come apart.

I think the valley cover does seal the top of the block, helping to maintain vacuum, doesn't it?

Thanks for the input though... I am going to take another good look at the valley cover tonight to see if those lines are casting marks.

PREDATOR-Z

Yeah that is normal, but if in doubt, take it to a machine shop and magnaflux them. That will tell you if they are indeed cracks.

GuitsBoy

iTrader: (4)

Do they go all the way through to the other side?

FWIW, every LSx cover ive ever seen has those casting lines.

oange ss

iTrader: (50)

if you have that much blowby you might want to consider a rebuild

yes it does, to seal the engine for the PVC system

67Firebird455

iTrader: (27)

Wish you could magnaflux aluminum.

FastKat

iTrader: (10)

I have a forged HPE shortblock and I'm not up and running yet... I'm going to be PISSED if I need a rebuild on a brand new engine!

LS1-IROC

iTrader: (4)

Those are completely normal...I used to work for the die-casting company that made those covers.

LsReddog

Magnaflux doesent work on non-ferrous metals. Those arent cracks just part of the casting.

ls1408cp

iTrader: (37)

here is a pic of mine i polished it and it had the same casting marks

LsReddog

That looks like some badass stuff goin in there What heads (look like ET) and rockers you got there?

PREDATOR-Z

Isn't there another method using UV reflective die? maybe magnaflux is not the right term.

LS1-IROC

iTrader: (4)

Zyglo is the only one I am familiar with.

LsReddog

I believe its called Zyglo its a dye type.

OldSchoolFormula

LS1-IROC, just was impressed witrh the car and wanted to say... NICE.