AMC Head Repair - weeping corner by bolt

[AMX69PHATTY]

So can an AMC head that is cracked and weeping in the corner by
the lower corner bolt be "repaired" by oven heating and welding ??

[jeepsr4ever]

Typically (And most likely you are talking a 291c) you use some epoxy or block fill but yes it can be repaired.

[tufcj]

I had one that had been welded successfully and pressure tested. Traded it (actually a pair) to MC for a set of 090s. Needed a little less compression for the current project.

I suppose those are waiting for the 4 axis mill to come in? Am I right MC?

Bob
tufcj

[jeepsr4ever]

The day I port a set of 291's ever again is the day I port a set of 291's ever again

[AMX69PHATTY]

Thanks

Yes they are '70 291c's, a pair, and one has the "issue".
The 291c's were planned for the '73 401.
So the epoxy / block filled is applied inside the collant passage(s) ?
Not on the outside surface of the casting ?

I still wonder if it can be caused by lifting, removing, & installing
a fully assembled motor with chains attached to front of head
on the passenger side, especially whith back of engine tilted down.
Now use and engine plate on the carb studs.

[1tuffcj]

glad this got braught up, i have a crack on one of my heads. thats why i ended up buying a set of edlebrock heads. so what's the best way to fix this head if it's fixable.the story on it i sent it out to the machine shop, had new valve guides and spring put in it. there 502-2 heads, the crack also goes up and on top in the area where it was milled for about a 1".

[AMX69PHATTY]

Yep, that's the spot, just like one of the two 3196291-1 castrings I have.
Wish I had a better digital camera.

1tuffcj - How's that 2nd NEW Holley Truck Avenger workin' out ???

[AMX69PHATTY]

See where you're now offereing 291-C castings for sale.

The pair I have are casting number 319 6291-1.

Is there a difference between -1 & -C castings ?

or do people use the -C to indicate closed chambers ?

[tufcj]

No difference in the -C or -I heads. I was just told that the -I heads were cast later as service replacements.

I have one -C and one -I head on my AMX.

Bob
tufcj

[fuzz401]

the c head I think has the smaler ex valves the and the -1 head has the bigger valves