318 Head Casting Flaw - Need Advice...

[table30]

I was installing headers on this stock 318 (1973 Satellite) and found what appears to be a serious casting flaw on the drivers side front exhaust port. The slag is about 1/8 thickness where flares out to meets the port. The normal port shape can be seen in the second image (sorry the photos are turned sideways). Can anyone tell me what tool I should used to grind this down properly? I don't have any experience in grinding cast iron. Thanks.

 

[66Satellite_in_NC]

Any good air grinder will do the job

 

[bm02tj]

use a rotary bur (file) in a drill or air grinder
then use a magnet to remove metal or pull head apart to clean

 

[table30]

Okay...thanks guys.

 

[Cranky]

You can stuff a rag into the port and then grind that down. Pull the rag out and then use a mag for anything that might get past the rag. If it was mine, I'd fire it up to blow out anything that may be still lurking in it. Won't hurt it a bit to fire it without the header being on there but you might want to use something to protect the area near the port so you don't burn anything. A couple of quick easy revs should do the trick then shut it off.

 

[table30]

Has anyone ever seen that kind of casting flaw in a mopar factory head? It seems pretty egregious.

 

[1wild&crazyguy]

Its rare to see that... but its been 318 heads mostly from my experience.

do like cranky said with the rag stuffed in...but make sure that exhaust valve is closed and use a shop vac hose taped next to the port while youre grinding to suck up most of the metal, then pull rag and vacuum out the port.

 

[table30]

Well...not a perfect job, but it was fun (I also included some pics of the car)...




...low budget Grandma car fun

 

[dieseldazzle]

Needs more barrels broski!!

 

[table30]

If it starts and runs OK I may look for a torker with a 600cfm holley. As I said, low budget all the way.

 

[moparstuart]

Rolocs pads / discs do a great job and they have several grits to go from course to fine

 

[1wild&crazyguy]

Good deal.

 

[table30]

Incidentally, I've been reading about using Q-jet carbs on mopars....apparently they actually came with them from the factory for a while when Carter went bankrupt. I bought a used Edelbrock Performer spread bore, dual plane manifold, along with a rebuilt mopar Quadrajet. I like the idea of having small primaries and huge demand-type secondaries, all in an affordable carb. I know people think they are junk, but I find the idea kind of interesting. We'll see if is does the job, performance-wise. Also, this was the lowest budget 4bbl. spreadbore solution I could come up with.