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Finally it's time to actually assemble the heads. Alvarez likes to lube the valves with white lithium grease for protection during initial fire-up. Motor oil also works fine, except it can run off the valve stems before the heads are installed, leaving the valves to operate "dry" until engine oil can reach them. Assembly is straightforward--compress the spring, install the retainer, and snap the locks into place off the valve stem. But whether you're using a pneumatic or a manual valve-spring compressor, make sure not to compress the spring assemblies too far, or you can damage the valve seals. Once the heads are assembled, check to make sure the springs are sitting squarely in their seats, and you're ready to bolt the new heads to your motor. CC View Related Article
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