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| Valve seats w/ OS valves https://slantsix.org/forum/viewtopic.php?t=16389 |
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| Author: | CStryker [ Wed Mar 01, 2006 6:11 pm ] |
| Post subject: | Valve seats w/ OS valves |
During my rebuild, I'm puttting in oversized valves. The head is a '78, and the original seats were still in great shape. Rather than replace what I thought was a perfectly good hardened seat, I just had them cut larger so that the new valves (1.44, 1.70) would fit. Since then I've had a couple people tell me that "hardened" seats are actually only surface hardened, and after cutting, these are no longer adequate. If this is true, where can I find the seats I need? |
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| Author: | Charrlie_S [ Wed Mar 01, 2006 8:01 pm ] |
| Post subject: | |
They are a little more then surface hardened, but, in general, that is true. The machine shop that does the work, should have the seats available. |
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| Author: | slantzilla [ Wed Mar 01, 2006 8:41 pm ] |
| Post subject: | |
My first good head that Mike and Blaine did just had the hardened seats ground out for the big valves. I beat the snot out of that head and never hurt a seat. It was always run on unleaded gas too. I have been told that you are in greater danger of losing an insert than burning the ground out seat anyway. By the time you put in a standard insert and grind it out for the big valves there is not much left.  My new real race car head just has the stock seats ground out too. 
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