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 :idea: :wink:

[AMX69PHATTY]

Thanks :t:

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".
http://i88.photobucket.com/albums/k161/blob_04/Picture066.jpg

[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 ???

:smile:

[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

[tufcj]

All of the -I heads should have the 1.680" exhaust valves. If you have -C heads with the 1.625" valves, they are VERY early 1970 heads. All the mid/late 70 and early 71 -C heads had the 1.680" valves.

Bob
tufcj

[AMX69PHATTY]

Ok, thanks :t:

Read over at amcforums where someone was talking about "Spray Welding" on the coners to prevent cracking, and it can even be used to fix cracks :-|