1.8 AMC heads: Current state?

[x-faktory]

I recently built a 1911 with 1.8 AMC heads, purchased from AA. runs great! However ,when researching these heads, I came across reported issues related to the seats and valves..i.E. good head castings, but the valves, springs seats were not great......but, that being said.... most of these reports are from 10 years ago.

Does anyone know if AMC addressed these issues in the last 10 years and made improvements? Or????? Please let me know if you have current, direct experience and info.

regards,
al

[x-faktory]

Lot's of people looking, but no one has current experience to share?

regards,
al

[dstar5000]

REPLACE EVERYTHING REPLACEABLE IF YOU WANT 100,000 MILES FROM THE ENGINE....

DON

[Clatter]

The AMC heads will work with the factory parts for quite a while.
Depending upon you app, most 1911s would be built for a car and not a bus,
You would likely have good luck for many tens of thousands of miles.
If you want to run a loaded bus for more than that, then seats/valves etc. would be in order for replacement.

[K70]

I am stripping some and will let you know.
There are lots of cheap ways to do this yourself and save money for the machine shop to do the hard work.
Unless you want to do 10000miles and then take it apart again for fun because the moving parts are worn, that's the only thing to do.