BIG BAD BLACKSS

iTrader: (4)

I was getting ready to put the heads on my iron 370, but I found a small scratch in the sealing surface from one of the cylindes to one of the coolant jackets right next to it. I can just barley feel it with my fingernail, and I'm planning on pushing a D1SC to its limits on this motor. I was planning on running the 5 layer GM MLS head gastkets, and from what I hear they need a pretty much perfect surface to seal. Does this sound like I will deffinatly need to have it machined? I'm hoping its not nescessary to have to send it back to be re-done, but if it needs to be done it needs to be done.

This was from my camera phone, I will try to get a higher qualty pic but this shows where its at.

Blownz28man

iTrader: (2)

I for sure wouldn't run it. Just think how much static comprssion you'll be running and how much could blow through a lil scratch. You really want to pull it out later? Not a good sealing surface in my opinion. Mls hedgaskets don't have a lot of crush.

NassyVette

iTrader: (22)

Hard to tell how bad it is from the pics... How about using a graphite gasket? Or spray the los gaskets with copper sealer?

Tony Mamo @ AFR

iTrader: (13)

Gasket spray (sealer) might hold water pressure but it wont put up with cylinder pressure. You need a flat mating surface to properly seal the head gaslets and contain the cylinder pressure.

If it was my block I would deck it just to be on the safe side...

Tony

novaflash2002

iTrader: (51)

Run down to your local machinist, and have hime show you a set of heads that have been surffaced, not milled, and you will see that that are all scratched to hell like that.

BIG BAD BLACKSS

iTrader: (4)

I got a quote of around $900 to have it torn down and resurfaced. I think I'm gonna throw it in my truck and have them take a look at it. I can just barely feel it with my nail, not a deep scratch at all, but I hate its location. Gonna have em look at it and give their opinion in a few days. Hopefully its not too bad. May switch to a graphite head gasket as I am pretty sure it would be ok with that type of gasket. The scratch is maybe as deep as a human hair or less I'd say.

BIG BAD BLACKSS

iTrader: (4)

Is O-Ringing a viable option? I imagine the block can have grooves cut without dissasembling the whole motor right? Probably cheaper then $900 to have it decked too, I hope? lol

87silverbullet

iTrader: (11)

O-ringing it is an option but the motor will still have to come apart. I wouldn't want to be cutting grooves in my block with metal particles going everywhere and in my motor. O-ring gaskets cost more also.