Aluminum Cylinder Heads
The last thing you want to do is mess up the spark plug threads in the new aluminum heads. Before installation, we installed a new spark plug in each hole to check the threads and make sure they were clean. (Before installation of the plugs, always use anti-seize on the plug threads.) We performed the same process with the head-bolt holes in the block, installing and removing a new motor oil-coated ARP bolt in all 20 holes. View Related Article
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