Pontiac V8 engine
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*[http://www.pontiacpower.net/headcast.html Head casting numbers] | *[http://www.pontiacpower.net/headcast.html Head casting numbers] | ||
*[http://www.bassettracing.cz28.com/custom3.html 1959-'79 head casting numbers] | *[http://www.bassettracing.cz28.com/custom3.html 1959-'79 head casting numbers] | ||
| + | *[http://www.pontiacstreetperformance.com/psp/6XheadID.html 6X head ID] | ||
===Other ID=== | ===Other ID=== | ||
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==Heads== | ==Heads== | ||
===6X (and similar) heads=== | ===6X (and similar) heads=== | ||
| − | Casting 6X heads and similar heads from the "smog era" generally all have hardened exhaust seats, screw-in rocker studs and guide plates, with 2.11" intake x 1.66" exhaust valves. See [http://www.pontiacstreetperformance.com/psp/6XheadID.html ''How to Identify Pontiac's Small Chambered 6X Head''] for more info on ID'ing | + | Casting 6X heads and similar heads from the "smog era" generally all have hardened exhaust seats, screw-in rocker studs and guide plates, with 2.11" intake x 1.66" exhaust valves. See [http://www.pontiacstreetperformance.com/psp/6XheadID.html ''How to Identify Pontiac's Small Chambered 6X Head''] for more info on ID'ing 6X heads. |
When inspecting 6X head and Pontiac heads in general, check the spring installed height to be sure it is equal between the valves. The spring's seat and open pressure is also important but all but impossible to measure unless the springs are checked w/a spring gauge. There are spring gauges that can be used on an assembled head. When buying assembled heads, demand a receipt showing part numbers. That will not guarantee anything but will cut down on the BS. | When inspecting 6X head and Pontiac heads in general, check the spring installed height to be sure it is equal between the valves. The spring's seat and open pressure is also important but all but impossible to measure unless the springs are checked w/a spring gauge. There are spring gauges that can be used on an assembled head. When buying assembled heads, demand a receipt showing part numbers. That will not guarantee anything but will cut down on the BS. | ||
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